NOBUYUKI NAKAMURA
| Institute for Laser Science | Professor |
| Department of Engineering Science | Professor |
| Cluster III (Fundamental Science and Engineering) | Professor |
Researcher Information
Research Keyword
Career
- Apr. 2019 - Present
The University of Electro-Communications, Institute for Laser Science, 教授, Japan - 01 Apr. 2021 - 31 Mar. 2023
核融合科学研究所, 客員教授 - Apr. 2007 - Mar. 2019
The University of Electro-Communications, Institute for Laser Science, 准教授, Japan - Oct. 2015 - Oct. 2018
Northwest Normal University, Visiting Professor - 01 Apr. 2011 - 31 Mar. 2013
核融合科学研究所, 客員准教授 - Jul. 2003 - Mar. 2007
The University of Electro-Communications, Institute for Laser Science, 助教授, Japan - Apr. 2002 - Jun. 2003
理化学研究所, 基礎科学特別研究員 - Feb. 1997 - Dec. 2001
科学技術振興事業団多価冷イオンプロジェクト, 研究員 - Apr. 1995 - Jan. 1997
日本学術振興会, 特別研究員
Educational Background
Research Activity Information
Paper
- Measurement of transition probabilities of La II using Laser Induced Breakdown Spectroscopy (LIBS)
Kodangil Supriya; Nanae Domoto; Masaomi Tanaka; Daiji Kato; Gediminas Gaigalas; Hajime Tanuma; Nobuyuki Nakamura
Last, Journal of Quantitative Spectroscopy and Radiative Transfer, Elsevier BV, 322, 109011-109011, Apr. 2024, Peer-reviwed
Scientific journal, English - Simultaneous observation of noble gases and highly charged ions in an electron beam ion trap for accurate wavelength calibration of optical transitions
Naoki Kimura; Nobuyuki Nakamura
Last, Journal of Physics B: Atomic, Molecular and Optical Physics, IOP Publishing, 56, 22, 225001-225001, 27 Oct. 2023, Peer-reviwed, Abstract
Spectral lines of buffer noble gases injected into an electron beam ion trap (EBIT) have recently been used as a reference to aid accurate determination of the wavelengths of optical transitions of highly charged ions (HCIs). Simultaneous observation of emission lines of HCIs along with those of neutral atoms or singly charged ions represents a reliable method for wavelength calibration that suppresses systematic uncertainties. Here, we present visible and infrared emission spectra of buffer Ne and Ar gases in an EBIT and briefly review the buffer gas calibration method. The experimental conditions required for implementing the calibration method are discussed by investigating the dependence of the emission spectra of mixtures of HCIs and noble gases on electron beam’s parameters and gas pressure.
Scientific journal, English - Injection of metallic elements into an electron-beam ion trap using an electron impact metal vapor source
Naoki Kimura; Genichi Kiyama; Daiki Ito; Nobuyuki Nakamura
Journal of Physics B: Atomic, Molecular and Optical Physics, IOP Publishing, 23 Aug. 2023, Peer-reviwed, Abstract
We demonstrate a versatile method for injecting metallic elements into an electron-beam ion trap using a metal vapor source.
This method is based on the evaporation of a metal target by continuous electron-beam impact. 

We present visible emission spectra of highly charged tungsten ions prepared by the present injection scheme.
By comparison with the conventional injection method using a high-vapor-pressure W(CO)$_6$ compound, several advantages of the present method, i.e., suppressing charge exchange reactions in the trap region and quick recovery of the vacuum condition after stopping the injection, are found.
The present injection method also facilitates the measurement of emission spectra of highly charged niobium ions, which have never previously been observed using electron-beam ion traps.
Scientific journal - Strong Polarization of a J = 1/2 to 1/2 Transition Arising from Unexpectedly Large Quantum Interference
Nobuyuki Nakamura; Naoki Numadate; Simpei Oishi; Xiao-Min Tong; Xiang Gao; Daiji Kato; Hirokazu Odaka; Tadayuki Takahashi; Yutaka Tsuzuki; Yuusuke Uchida; Hirofumi Watanabe; Shin Watanabe; Hiroki Yoneda
Physical Review Letters, American Physical Society (APS), 130, 11, 15 Mar. 2023, Peer-reviwed
Scientific journal - Identification of Visible Lines in Pm-like W13+
Priti; Kota Inadome; Mayuko Funabashi; Nobuyuki Nakamura; Hiroyuki A. Sakaue; Izumi Murakami; Daiji Kato
Atoms, MDPI AG, 11, 3, 57-57, 13 Mar. 2023, Peer-reviwed, To provide spectroscopic data for W13+, the present work is focused on the analysis of spectra observed in the visible range, using a compact electron beam ion trap (CoBIT). Line identification is done by using a collisional radiative model, along with sophisticated structure calculations from FAC and GRASP2018. Most of the identified lines belong to magnetic dipole (M1) transitions between the levels of the 4f125p1 and 4f13 configurations.
Scientific journal - Charge Exchange Spectroscopy of Multiply Charged Erbium Ions
Yuki Nishimura; Saki Imaizumi; Hajime Tanuma; Nobuyuki Nakamura; Yuichiro Sekiguchi; Shinya Wanajo; Hiroyuki A. Sakaue; Daiji Kato; Izumi Murakami; Masaomi Tanaka; Gediminas Gaigalas
Atoms, MDPI AG, 11, 2, 40-40, 15 Feb. 2023, Peer-reviwed, The origin of heavier elements than iron is still under discussion, and recent studies suggest that the contribution of the r-process in neutron star mergers is dominant. Future modeling of such processes will require a huge amount of spectroscopic data on multiply charged ions of heavy elements. However, these experimental data are extremely scarce for heavy elements. In this work, we have performed the measurements of charge exchange spectroscopy for multiply charged Er ions in the visible light range. We report observed emission lines from multiply charged Er ions and their identification based on theoretical estimates.
Scientific journal - Electric-quadrupole transition-rate measurement of a highly charged ion in an electron-beam ion trap using pulsed laser excitation from a metastable state
Naoki Kimura; Priti; Susumu Kuma; Toshiyuki Azuma; Nobuyuki Nakamura
Physical Review A, American Physical Society (APS), 107, 2, 022805, 09 Feb. 2023, Peer-reviwed
Scientific journal - Detailed Analysis of Spectra from Ga-like Ions of Heavy Elements Observed in High-Temperature Plasmas
Chihiro Suzuki; Fumihiro Koike; Izumi Murakami; Daiji Kato; Naoki Tamura; Tetsutarou Oishi; Nobuyuki Nakamura
Atoms, MDPI AG, 11, 2, 33-33, 07 Feb. 2023, Peer-reviwed, This study has systematically investigated the atomic number (Z) dependence of spectra from gallium-like (Ga-like) ions of heavy elements. We have mainly analyzed the experimental spectra recorded in high-temperature plasmas produced in the Large Helical Device (LHD) for various elements with atomic numbers from 57 onward. The measured wavelengths are compared with theoretical values calculated with a multi-configuration Dirac Fock code. As a result, we have successfully obtained Z-dependent wavelengths of several prominent transitions of Ga-like ions, including a magnetic dipole (M1) transition. Many of them have been experimentally identified for the first time in this study. The present results manifest the significant effects of configuration interaction and spin–orbit interaction for highly charged heavy ions.
Scientific journal - Hyperfine-structure-resolved laser spectroscopy of many-electron highly charged ions
Naoki Kimura; Priti; Yasutaka Kono; Pativate Pipatpakorn; Keigo Soutome; Naoki Numadate; Susumu Kuma; Toshiyuki Azuma; Nobuyuki Nakamura
Communications Physics, Springer Science and Business Media LLC, 6, 1, 8, 24 Jan. 2023, Peer-reviwed, Abstract
Hyperfine structures of highly charged ions (HCIs) are favourable spectroscopic targets for exploring fundamental physics along with nuclear properties. Recent proposals of HCI atomic clocks highlight their importance, especially for many-electron HCIs, and they have been theoretically investigated by refining atomic-structure calculations. However, developments in hyperfine spectroscopy of many-electron HCIs have not proceeded due to experimental difficulty. Here, we demonstrate hyperfine-structure-resolved laser spectroscopy of HCIs in an electron beam ion trap plasma, employing the magnetic-dipole transition in the 4d95s state of 127I7+. Ion-state manipulation by controlled electron collisions in the well-defined laboratory plasma enables laser-induced fluorescence spectroscopy of trapped HCIs. The observed spectrum of evaporatively cooled ions under low magnetic fields shows characteristic features reflecting the hyperfine structures. The present demonstration using combined optical and plasma approaches provides a benchmark for state-of-the-art atomic calculations of hyperfine structures in many-electron HCIs, and offers possibilities for a variety of unexploited experiments.
Scientific journal - Energy Dependence of the Line Ratio I(233.9 Å)/I(243.8 Å) in Fe xv Observed with an Electron Beam Ion Trap
Hiroyuki A. Sakaue; Daiji Kato; Norimasa Yamamoto; Izumi Murakami; Hirohisa Hara; Nobuyuki Nakamura
The Astrophysical Journal, American Astronomical Society, 943, 1, 14, 01 Jan. 2023, Peer-reviwed, Abstract
We present the energy dependence of the intensity ratio between the 3s3p3P2—3s3d3D3 transition at 233.9 Å and the 3s3p1P1—3s3d1D2 transition at 243.8 Å in Fe xv studied with an electron beam ion trap over an energy range that spans resonance excitation regions. Clear resonance structures are observed in the electron energy range of 400–600 eV. The energy dependence obtained in the experiment is compared with a collisional-radiative model calculation, including resonance excitations, and overall agreement is found. It is shown that the ratio strongly reflects the population of the 3s3p3P2 metastable state, which is the lower state of the 233.9 Å transition.
Scientific journal - The M1 transitions and visible spectra of W13+ ion
Yile Liu; Cunqiang Wu; Xiaobin Ding; Fengling Zhang; Ling Zhang; Ke Yao; Yang Yang; Fumihiro Koike; Izumi Murakami; Daiji Kato; Hiroyuki A. Sakaue; Nobuyuki Nakamura; Chenzhong Dong
Physics Letters A, Elsevier BV, 454, 128500-128500, Dec. 2022, Peer-reviwed
Scientific journal - Giant retardation effect in electron-electron interaction
Zhimin Hu; Gang Xiong; Zhencen He; Zhihao Yang; Naoki Numadate; Chengwu Huang; Jiamin Yang; Ke Yao; Baoren Wei; Yaming Zou; Chensheng Wu; Yulong Ma; Yong Wu; Xiang Gao; Nobuyuki Nakamura
Physical Review A, American Physical Society (APS), 105, 3, l030801, 29 Mar. 2022, Peer-reviwed
Scientific journal - Z-dependent crossing of excited-state energy levels in highly charged galliumlike lanthanide atomic ions
Fumihiro Koike; Chihiro Suzuki; Izumi Murakami; Daiji Kato; Naoki Tamura; Nobuyuki Nakamura
Physical Review A, American Physical Society (APS), 105, 3, 032802, 04 Mar. 2022, Peer-reviwed
Scientific journal, English - Laser Induced Breakdown Spectroscopy of Er II for Transition Probability Measurements
Yuki Naoi; Masayuki Iwata; Daichi Yokota; Gediminas Gaigalas; Daiji Kato; Izumi Murakami; Hiroyuki A. Sakaue; Yuichiro Sekiguchi; Masaomi Tanaka; Hajime Tanuma; Shinya Wanajo; Nobuyuki Nakamura
Applied Sciences, MDPI AG, 12, 4, 2219-2219, 21 Feb. 2022, Peer-reviwed, We present a laser induced breakdown spectrum of Er II in the near ultraviolet region. To use the spectrum for the evaluation of the transition probabilities, an alloy target with a low content of Er was used to suppress the self-absorption. From the linearity of the Boltzmann plot obtained by using the sensitivity corrected experimental intensity and existing transition probability data, the local thermal equilibrium condition of the plasma and the reliability of the transition probability data are confirmed. The linear function obtained in the Boltzmann plot is used for the determination of a previously unreported transition probability for the line at 393.863 nm.
Scientific journal, English - Polarization measurement of L -shell radiative recombination x rays from highly charged bismuth ions
Naoki Numadate; Shimpei Oishi; Hirokazu Odaka; Priti; Makoto Sakurai; Tadayuki Takahashi; Yutaka Tsuzuki; Yuusuke Uchida; Hirofumi Watanabe; Shin Watanabe; Hiroki Yoneda; Nobuyuki Nakamura
Physical Review A, American Physical Society (APS), 105, 2, 023109, 17 Feb. 2022, Peer-reviwed
Scientific journal - Modeling the wavelength of unresolved transition arrays in the extreme ultraviolet region from Sn to Hf ions by combining theoretical and experimental spectral data
A. Sasaki; K. Fujii; I. Murakami; H. A. Sakaue; T. Nishikawa; H. Ohashi; N. Nakamura
AIP Advances, AIP Publishing, 12, 2, 025309, 01 Feb. 2022, Peer-reviwed
Scientific journal - Electron Density Dependence of Extreme Ultraviolet Line Intensity Ratios in Ar XIV
Nobuyuki Nakamura; Naoki Numadate; Yasutaka Kono; Izumi Murakami; Daiji Kato; Hiroyuki A. Sakaue; Hirohisa Hara
The Astrophysical Journal, American Astronomical Society, 921, 2, 115, 01 Nov. 2021, Peer-reviwed
Scientific journal - Emission Lines in 290–360 nm of Highly Charged Tungsten Ions W20+–W29+
Shota Era; Daiji Kato; Hiroyuki A. Sakaue; Toshiki Umezaki; Nobuyuki Nakamura; Izumi Murakami
Atoms, MDPI AG, 9, 3, 63, 08 Sep. 2021, Peer-reviwed, Forbidden transitions in the near-UV and visible wavelength of highly charged tungsten (W) ions are potentially useful as novel tungsten diagnostics means of fusion plasmas. Emission lines in 290–360 nm from Wq+ ions interacting with an electron beam of 540–1370 eV are measured, using a compact electron-beam-ion-trap. The charge states of 64 lines are identified as W20+–W29+. A magnetic-dipole (M1) line of W29+ between the excited states (4d84f)[ (4d5/2−2)44f7/2]13/2→[ (4d5/2−2)44f5/2]13/2 is newly identified; the wavelength is determined as 351.03(10) nm in air. The theoretical wavelength calculated using the multiconfiguration Dirac–Hartree–Fock method is in a good agreement with the measurement.
Scientific journal - Evaluation of Fe XIV Intensity Ratio for Electron Density Diagnostics by Laboratory Measurements
Nagaaki Kambara; Tomoko Kawate; Tetsutarou Oishi; Yasuko Kawamoto; Hiroyuki A. Sakaue; Daiji Kato; Nobuyuki Nakamura; Hirohisa Hara; Izumi Murakami
Atoms, MDPI AG, 9, 3, 60-60, 30 Aug. 2021, Peer-reviwed, The intensity ratio of Fe XIV 264.765A/274.203A is useful to determine the electron density of solar corona, and the relationship between the electron density and the intensity ratio obtained from a model should be evaluated using laboratory plasmas to estimate the electron density more precisely. We constructed a new collisional–radiative model (CR-model) for Fe XIV (an Al-like iron ion) by considering the processes of proton-impact excitation and electron-impact ionization to the excited states of a Mg-like iron ion. The atomic data used in the CR-model were calculated using the HULLAC atomic code. The model was evaluated based on laboratory experiments using a compact electron beam ion trap, called CoBIT, and the Large Helical Device (LHD). The measured Fe XIV 264.785 Å/274.203 Å line intensity ratio with CoBIT was 1.869 ± 0.036, and it agreed well with our CR-model results. Concurrently, the measured ratio using LHD was larger than the results of our CR-model and CHIANTI. The estimated electron densities using our CR-model agreed with those from CHIANTI within a factor of 1.6–2.4 in the range of ne≈1010−11cm−3. Further model development is needed to explain the ratio in a high-electron density region.
Scientific journal - An application of a Si/CdTe Compton camera for the polarization measurement of hard x rays from highly charged heavy ions
Yutaka Tsuzuki; Shin Watanabe; Shimpei Oishi; Nobuyuki Nakamura; Naoki Numadate; Hirokazu Odaka; Yuusuke Uchida; Hiroki Yoneda; Tadayuki Takahashi
Review of Scientific Instruments, AIP Publishing, 92, 6, 063101, 01 Jun. 2021, Peer-reviwed
Scientific journal - Highly sensitive detection of H2 O adsorbed on Si(111)7 × 7 and Si(100)2 × 1 surfaces by means of slow highly charged Xe ions
Satoshi Takahashi; Masahide Tona; Nobuyuki Nakamura; Chikashi Yamada; Makoto Sakurai; Shunsuke Ohtani
Surface Science, Elsevier BV, 707, 121785, May 2021, Peer-reviwed
Scientific journal - 5p − 4f level crossing in palladium-like ions and its effect on metastable states
Naoki Kimura; Ryunosuke Kodama; Priti; Naoki Numadate; Kento Suzuki; Masashi Monobe; Nobuyuki Nakamura
Physical Review A, American Physical Society (APS), 102, 3, 032807, 09 Sep. 2020, Peer-reviwed
Scientific journal - Interactions of slow highly charged Bismuth ions with highly oriented pyrolytic graphite surface
S. Das; H. Ohashi; N. Nakamura
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Elsevier BV, 478, 163-168, Sep. 2020, Peer-reviwed
Scientific journal - Collisional-radiative modeling of the 5p − 5s spectrum of W xiv–W xvi ions
Xiaobin Ding; Fengling Zhang; Yang Yang; Ling Zhang; Fumihiro Koike; Izumi Murakami; Daiji Kato; Hiroyuki A. Sakaue; Nobuyuki Nakamura; Chenzhong Dong
Physical Review A, American Physical Society (APS), 101, 4, 042509, 27 Apr. 2020, Peer-reviwed
Scientific journal - Resonant electron impact excitation of highly charged Fe ions studied with a compact electron beam ion trap
Masashi Monobe; Hiroyuki A. Sakaue; Daiji Kato; Izumi Murakami; Hirohisa Hara; Tetsuya Watanabe; Nobuyuki Nakamura
X-Ray Spectrometry, Wiley, 49, 4, 511-514, 09 Mar. 2020, Peer-reviwed
Scientific journal - Observation of electric octupole emission lines strongly enhanced by the anomalous behavior of a cascading contribution
Hiroyuki A. Sakaue; Daiji Kato; Izumi Murakami; Hayato Ohashi; Nobuyuki Nakamura
Physical Review A, American Physical Society (APS), 100, 5, 052515, 27 Nov. 2019, Peer-reviwed
Scientific journal - Direct determination of the energy of the first excited fine-structure level in Ba6+
N. Kimura; R. Kodama; K. Suzuki; S. Oishi; M. Wada; K. Okada; N. Ohmae; H. Katori; N. Nakamura
Physical Review A, American Physical Society (APS), 100, 5, 052508, 21 Nov. 2019, Peer-reviwed
Scientific journal - Direct Wavelength Measurement of the Visible M1 Transition in Ba<sup>7+ </sup>with a Novel Calibration Method
Naoki KIMURA; Ryunosuke KODAMA; Kento SUZUKI; Shimpei OISHI; Michiharu WADA; Kunihiro OKADA; Noriaki OHMAE; Hidetoshi KATORI; Nobuyuki NAKAMURA
Plasma and Fusion Research, Japan Society of Plasma Science and Nuclear Fusion Research, 14, 1201021, 23 Jan. 2019, Peer-reviwed
Scientific journal - Collisional radiative model for the M1 transition spectrum of the highly-charged W 54+ ions
Xiaobin Ding; Jiaoxia Yang; Linfan Zhu; Fumihiro Koike; Izumi Murakami; Daiji Kato; Hiroyuki A. Sakaue; Nobuyuki Nakamura; Chenzhong Dong
Physics Letters A, Elsevier BV, 382, 34, 2321-2325, Aug. 2018, Peer-reviwed
Scientific journal - Properties of Kilonovae from Dynamical and Post-merger Ejecta of Neutron Star Mergers
Masaomi Tanaka; Daiji Kato; Gediminas Gaigalas; Pavel Rynkun; Laima Radžiūtė; Shinya Wanajo; Yuichiro Sekiguchi; Nobuyuki Nakamura; Hajime Tanuma; Izumi Murakami; Hiroyuki A. Sakaue
The Astrophysical Journal, American Astronomical Society, 852, 2, 109, 12 Jan. 2018, Peer-reviwed
Scientific journal - Iontrap experiment for sympathetic cooling of highly charged ion II
Kimura Naoki; Wada Michiharu; Okada Kunihiro; Kato Hidetoshi; Nakamura Nobuyuki; Ohmae Noriaki; Katori Hidetoshi
Meeting Abstracts of the Physical Society of Japan, The Physical Society of Japan, 73.1, 719-719, 2018
Japanese - Energy levels, lifetimes and radiative data of W LV
Xiao-bin Ding; Rui Sun; Fumihiro Koike; Izumi Murakami; Daiji Kato; Hiroyuki A. Sakaue; Nobuyuki Nakamura; Chen-zhong Dong
Atomic Data and Nuclear Data Tables, Elsevier BV, 119, 354-425, Jan. 2018, Peer-reviwed
Scientific journal - Theoretical investigation on the soft X-ray spectrum of the highly-charged W54+ ions
Xiaobin Ding; Jiaoxia Yang; Fumihiro Koike; Izumi Murakami; Daiji Kato; Hiroyuki A Sakaue; Nobuyuki Nakamura; Chenzhong Dong
Journal of Quantitative Spectroscopy and Radiative Transfer, Elsevier BV, 204, 7-11, Jan. 2018, Peer-reviwed
Scientific journal - Resonant Electron Impact Excitation of 3dLevels in Fe14+and Fe15+
Takashi Tsuda; Erina Shimizu; Safdar Ali; Hiroyuki A. Sakaue; Daiji Kato; Izumi Murakami; Hirohisa Hara; Tetsuya Watanabe; Nobuyuki Nakamura
The Astrophysical Journal, American Astronomical Society, 851, 2, 82-82, 14 Dec. 2017, Peer-reviwed
Scientific journal - Resonant excitation of Fe 14+ observed with a compact electron beam ion trap
Takashi Tsuda; Erina Shimizu; Safdar Ali; Hiroyuki A. Sakaue; Daiji Kato; Izumi Murakami; Hirohisa Hara; Tetsuya Watanabe; Nobuyuki Nakamura
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Elsevier BV, 408, 191-193, Oct. 2017, Peer-reviwed
Scientific journal - Visible spectra of highly charged holmium ions observed with a compact electron beam ion trap
Takayuki Nakajima; Kunihiro Okada; Michiharu Wada; Vladimir A. Dzuba; Marianna S. Safronova; Ulyana I. Safronova; Noriaki Ohmae; Hidetoshi Katori; Nobuyuki Nakamura
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Elsevier BV, 408, 118-121, Oct. 2017, Peer-reviwed
Scientific journal - Extreme ultraviolet spectroscopy of highly charged xenon and barium with a compact electron beam ion trap
Safdar Ali; Nobuyuki Nakamura
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Elsevier BV, 408, 122-124, Oct. 2017, Peer-reviwed
Scientific journal - Extreme ultraviolet spectra of S IX and S X relevant to solar coronal plasmas
Safdar Ali; Hiroyuki Kato; Nobuyuki Nakamura
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Elsevier BV, 408, 34-37, Oct. 2017, Peer-reviwed
Scientific journal - Solar wind charge exchange in laboratory – Observation of forbidden X-ray transitions
Naoki Numadate; Hirofumi Shimaya; Takuya Ishida; Kunihiro Okada; Nobuyuki Nakamura; Hajime Tanuma
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Elsevier BV, 408, 114-117, Oct. 2017, Peer-reviwed
Scientific journal - Population trapping: The mechanism for the lost resonance lines in Pm-like ions
Daiji Kato; Hiroyuki A. Sakaue; Izumi Murakami; Nobuyuki Nakamura
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Elsevier BV, 408, 16-20, Oct. 2017, Peer-reviwed
Scientific journal - High resolution EUV spectroscopy of xenon ions with a compact electron beam ion trap
Safdar Ali; Nobuyuki Nakamura
Journal of Quantitative Spectroscopy and Radiative Transfer, Elsevier BV, 198, 112-116, Sep. 2017, Peer-reviwed
Scientific journal - Theoretical study on the soft X-ray spectra of E1 transition of W LV ion
Jiaoxia Yang; Xiaobin Ding; Rui Sun; Fumihiro Koike; Izumi Murakami; Daiji Kato; Hiroyuki A Sakaue; Nobuyuki Nakamura; Chenzhong Dong
Journal of Physics: Conference Series, IOP Publishing, 875, 052029-052029, Jul. 2017
Scientific journal - Neon-like Iron Ion Lines Measured in NIFS/Large Helical Device (LHD) andHinode/EUV Imaging Spectrometer (EIS)
Tetsuya Watanabe; Hirohisa Hara; Izumi Murakami; Daiji Kato; Hiroyuki A. Sakaue; Shigeru Morita; Chihiro Suzuki; Naoki Tamura; Norimasa Yamamoto; Nobuyuki Nakamura
The Astrophysical Journal, American Astronomical Society, 842, 1, 12-12, 07 Jun. 2017, Peer-reviwed
Scientific journal - Measurements of density dependent intensity ratios of extreme ultraviolet line emission from Fe X, XI, and XII
Erina Shimizu; Safdar Ali; Takashi Tsuda; Hiroyuki A. Sakaue; Daiji Kato; Izumi Murakami; Hirohisa Hara; Tetsuya Watanabe; Nobuyuki Nakamura
Astronomy and Astrophysics, EDP Sciences, 601, A111-A111, 15 May 2017, Peer-reviwed
Scientific journal - Experimental evaluation of fractional abundance data for W23+–W28+
Keisuke Fujii; Daiji Kato; Nobuyuki Nakamura; Motoshi Goto; Shigeru Morita; Masahiro Hasuo
Journal of Physics B: Atomic, Molecular and Optical Physics, IOP Publishing, 50, 5, 055004-055004, 14 Feb. 2017, Peer-reviwed
Scientific journal - E1, M1, E2 transition energies and probabilities of W54+ions
Xiao-bin Ding; Rui Sun; Jia-xin Liu; Fumihiro Koike; Izumi Murakami; Daiji Kato; Hiroyuki A Sakaue; Nobuyuki Nakamura; Chen-zhong Dong
Journal of Physics B: Atomic, Molecular and Optical Physics, IOP Publishing, 50, 4, 045004-045004, 31 Jan. 2017, Peer-reviwed
Scientific journal - Iontrap experiment for sympathetic cooling of highly charged ion
Kimura Naoki; Wada Michiharu; Okada Kunihiro; Kato Hidetoshi; Nakamura Nobuyuki; Ohmae Noriaki; Katori Hidetoshi
Meeting Abstracts of the Physical Society of Japan, The Physical Society of Japan, 72.2, 443-443, 2017
Japanese - Intensity ratio measurements of EUV spectra from Fe ions relevant to solar corona diagnostics
Safdar Ali; Erina Shimizu; Takashi Tsuda; Hiroyuki A. Sakaue; Daiji Kato; Izumi Murakami; Hirohisa Hara; Tetsuya Watanabe; Nobuyuki Nakamura
AIP Conference Proceedings, Author(s), 1811, 030001, 2017
International conference proceedings - シリーズ 多価イオンの物理とその応用：これまでの進展と今後の展開 第４回 多価イオンと電子の相対論的相互作用
中村信行
Lead, 原子衝突学会誌しょうとつ, 13, 2, 47-54, Mar. 2016 - Laser-produced multi-charged heavy ions as efficient soft x-ray sources
Takeshi Higashiguchi; Yuhei Suzuki; Masato Kawasaki; Hayato Ohashi; Nobuyuki Nakamura; Chihiro Suzuki; Hiroyuki A. Sakaue; Daiji Kato; Izumi Murakami; Fumihiro Koike; Shinsuke Fujioka; Hiroaki Nishimura; Atsushi Sunahara; Bowen Li; Padraig Dunne; Gerry O’Sullivan
Research Report NIFS PROC, 99, 77-87, Feb. 2016, We demonstrate EUV and soft x-ray sources in the 2 to 7 nm spectral region related to the beyond EUV (BEUV) question at 6x nm and a water window source based on laser-produced high-Z plasmas. Resonance emission from multiply charged ions merges to produce intense unresolved transition arrays (UTAs), extending below the carbon K edge (4.37 nm). An outline of a microscope design for single-shot live cell imaging is proposed based on a high-Z plasma UTA source, coupled to x-ray optics. We will discuss the progress and Z-scaling of UTA emission spectra to achieve lab-scale table-top, efficient, high-brightness high-Z plasma EUV-soft x-ray sources for in vivo bio-imaging applications.
English - Collisional-radiative model for the visible spectrum of W 26+ ions
Xiaobin Ding; Jiaxin Liu; Fumihiro Koike; Izumi Murakami; Daiji Kato; Hiroyuki A. Sakaue; Nobuyuki Nakamura; Chenzhong Dong
Physics Letters A, Elsevier BV, 380, 7-8, 874-877, Feb. 2016, Peer-reviwed
Scientific journal - 21pBE-6 Laboratory observation of the forbidden X-ray transitions in SWCX
Numadate N.; Shimada K.; Uchikura Y.; Shimaya H.; Ishida T.; Yamada S.; Ezoe Y.; Ishisaki Y.; Ohashi T.; Okada K.; Nakamura N.; Shinozaki K.; Mitsuda K.; Liu L.; Wang J-G.; Tanuma H.
Meeting Abstracts of the Physical Society of Japan, The Physical Society of Japan (JPS), 71, 735-735, 2016
Japanese - Electron density dependence of emission lines from highly charged iron ions.
Sakaue H. A.; Nakamura N.; Kato D.; Murakami I.
Meeting Abstracts of the Physical Society of Japan, The Physical Society of Japan, 71, 468-468, 2016,我々は、太陽観測において重要である鉄多価イオンのEUV発光線の分光研究を電子ビームイオントラップ装置(CoBIT)を用いて行ってきた。それらの研究で、Fe XV からの発光線強度比の電子密度依存性が、理論値と大きく違っていることが見出された。今回は電子密度がCoBITより4桁程度高い核融合プラズマ装置(LHD)を用い、高電子密度領域でのFe XV からの発光線強度比を測定した。当日は広範囲の電子密度依存性ついて報告する。
Japanese - Measurement of fractional abundance data for W23-W28 based on near-UV spectroscopy in LHD
Fujii Keisuke; Kato Daiji; Nakamura Nobuyuki; Goto Motoshi; Morita Shigeru; Hasuo Masahiro
Meeting Abstracts of the Physical Society of Japan, The Physical Society of Japan, 71, 687-687, 2016,タングステン禁制線20本の発光強度の電子温度依存性を複数のLHDプラズマから計測することで、23-28価タングステンイオンの相対密度データを実験的に評価した。各価数イオンの相対密度データの中心電子温度は、これまで報告されたもの[Plasma Phys. Contrl. Fusion, 50, 085016 (2008)]に比べ、約200 eV小さかった。
Japanese - Development of cryogenic combined ion trap toward Highly charged ion spectroscopy
Kimura Naoki; Okada Kunihiro; Wada Michiharu; Nakamura Nobuyuki; Ohmae Noriaki; Katori Hidetoshi
Meeting Abstracts of the Physical Society of Japan, The Physical Society of Japan, 71, 557-557, 2016,我々のグループでは、微細構造定数αの時間依存性検証を目的とした『多価イオン精密分光』の研究を計画している。計画の実現に向け、現在ペニングトラップと線形ポールトラップを4Kチャンバー内で組み合わせた"冷却コンバインドイオントラップ"の設計・製作を行っている。講演では、製作したイオントラップの概要と、それを用いて行う『Be+イオンのレーザー冷却』『多価イオン生成』の進捗に関して説明する予定である。
Japanese - Visible emission spectroscopy of highly charged tungsten ions in LHD: I. Survey of new visible emission lines
M Shinohara; K Fujii; D Kato; N Nakamura; M Goto; S Morita; M Hasuo
Physica Scripta, IOP Publishing, 90, 12, 125402-125402, 06 Nov. 2015, Peer-reviwed, Abstract
We found 12 unknown visible emission lines from the core plasma of large helical device with highly charged tungsten ions accumulated. The observation was made with our home-built échelle spectrometer, which covers the wavelength range of 450–715 nm with a wavelength resolution of <0.05 nm for two lines of sight; one line passes both the core and edge plasmas and the other passes only the edge plasma. These emission lines are attributed to highly charged tungsten ions because (1) they were observed only after a tungsten pellet was injected into the plasma, (2) they were observed only from the core plasma where the electron temperature is 1 keV, (3) they show line broadenings that are close to the Doppler widths of tungsten ions with 1 keV temperature and (4) the wavelengths of some of these emission lines are close to the calculation results for tungsten ions in the charge state of 25–28.
Scientific journal - Intensity ratio in EUV spectra of highly charged Fe ions: Experimental evaluation of astrophysical plasma model
Erina Shimizu; Safdar Ali; Hiroyuki A Sakaue; Daiji Kato; Izumi Murakami; Hirohisa Hara; Tetsuya Watanabe; Nobuyuki Nakamura
Journal of Physics: Conference Series, IOP Publishing, 635, 5, 052061-052061, 07 Sep. 2015, Peer-reviwed
Scientific journal - Extreme ultraviolet and visible spectroscopy of promethiumlike heavy ions
Yusuke Kobayashi; Kai Kubota; Kazuki Omote; Akihiro Komatsu; Junpei Sakoda; Maki Minoshima; Daiji Kato; Jiguang Li; Hiroyuki A. Sakaue; Izumi Murakami; Nobuyuki Nakamura
Physical Review A, American Physical Society (APS), 92, 2, 022510, 24 Aug. 2015, Peer-reviwed
Scientific journal - Intensity ratio measurements for density sensitive lines of highly charged Fe ions
Safdar Ali; Erina Shimizu; Hiroyuki A. Sakaue; Daiji Kato; Izumi Murakami; Norimasa Yamamoto; Hirohisa Hara; Tetsuya Watanabe; Nobuyuki Nakamura
Hyperfine Interactions, Springer Science and Business Media LLC, 235, 1-3, 45-49, 08 Jul. 2015, Peer-reviwed
Scientific journal - Mechanism of dominance of the Breit interaction in dielectronic recombination
Xiao-Min Tong; Zhimin Hu; Yueming Li; Xiaoyin Han; Daiji Kato; Hirofumi Watanabe; Nobuyuki Nakamura
Journal of Physics B: Atomic, Molecular and Optical Physics, IOP Publishing, 48, 14, 144002-144002, 28 May 2015, Peer-reviwed
Scientific journal - Intensity ratio of EUV emission lines in Fe XV studied with electron beam ion traps
Erina Shimizu; Hiroyuki A. Sakaue; Daiji Kato; Izumi Murakami; Norimasa Yamamoto; Hirohisa Hara; Tetsuya Watanabe; Nobuyuki Nakamura
Journal of Physics: Conference Series, Institute of Physics Publishing, 583, 012019, 2015, Peer-reviwed, We present emission spectra of highly charged Fe ions in the extreme ultraviolet range obtained with two electron beam ion traps. The intensity ratio between the 3s3p3P2 - 3s3d 3D3 (233.9 Å) and 3s3p 1P1 - 3s3d 1D2 (243.8 Å) transitions in Fe XV is given for various electron beam parameters. The experimental ratios are compared with theoretical model calculation as well as our previous experiment, where significant discrepancy with theoretical model was found. The present result, which has been obtained with a higher resolution spectrometer to investigate possible line blending, confirms that the discrepancy is not due to line blending.
International conference proceedings, English - Atomic-number dependence of the magnetic-sublevel population in the autoionization state formed in dielectronic recombination
Zhimin Hu; Yueming Li; Xiaoying Han; Daiji Kato; Xiaomin Tong; Hirofumi Watanabe; Nobuyuki Nakamura
Physical Review A, American Physical Society (APS), 90, 6, 062702, 01 Dec. 2014, Peer-reviwed
Scientific journal - EUV spectroscopy of highly charged high Z ions in the Large Helical Device plasmas
C Suzuki; F Koike; I Murakami; N Tamura; S Sudo; H A Sakaue; N Nakamura; S Morita; M Goto; D Kato; T Nakano; T Higashiguchi; C S Harte; G OʼSullivan
Physica Scripta, IOP Publishing, 89, 11, 114009-114009, 01 Nov. 2014, Peer-reviwed
Scientific journal - Development of a Kingdon ion trap system for trapping externally injected highly charged ions
Naoki Numadate; Kunihiro Okada; Nobuyuki Nakamura; Hajime Tanuma
Review of Scientific Instruments, AIP Publishing, 85, 10, 103119, 01 Oct. 2014, Peer-reviwed, We have developed a Kingdon ion trap system for the purpose of the laboratory observation of the x-ray forbidden transitions of highly charged ions (HCIs). Externally injected Arq+ (q = 5−7) with kinetic energies of 6q keV were successfully trapped in the ion trap. The energy distribution of trapped ions is discussed in detail on the basis of numerical simulations. The combination of the Kingdon ion trap and the time-of-flight mass spectrometer enabled us to measure precise trapping lifetimes of HCIs. As a performance test of the instrument, we measured trapping lifetimes of Arq+ (q = 5−7) under a constant number density of H2 and determined the charge-transfer cross sections of Arq+(q = 5, 6)-H2 collision systems at binary collision energies of a few eV. It was confirmed that the present cross section data are consistent with previous data and the values estimated by some scaling formula.
Scientific journal - Indirect processes in x-ray line emissions of 5f→ 3d transitions of highly charged gold ions
Zhimin Hu; Nobuyuki Nakamura; Jiyan Zhang; Jian Sun; Jiamin Yang; Hirofumi Watanabe; Shunsuke Ohtani; Baohan Zhang
Journal of Physics: Conference Series, IOP Publishing, 488, 6, 062023-062023, 10 Apr. 2014, Peer-reviwed
Scientific journal - Spectroscopic study of promethiumlike bismuth with an electron-beam ion trap: Search for alkali-metal-like resonance lines
Yusuke Kobayashi; Daiji Kato; Hiroyuki A. Sakaue; Izumi Murakami; Nobuyuki Nakamura
Physical Review A, American Physical Society (APS), 89, 1, 010501, 27 Jan. 2014, Peer-reviwed
Scientific journal - Tuning extreme ultraviolet emission for optimum coupling with multilayer mirrors for future lithography through control of ionic charge states
Hayato Ohashi; Takeshi Higashiguchi; Bowen Li; Yuhei Suzuki; Masato Kawasaki; Tatsuhiko Kanehara; Yuya Aida; Shuichi Torii; Tetsuya Makimura; Weihua Jiang; Padraig Dunne; Gerry O'Sullivan; Nobuyuki Nakamura
Journal of Applied Physics, AIP Publishing, 115, 3, 033302-033302, 21 Jan. 2014, Peer-reviwed
Scientific journal - Relativistic CI calculations of spectroscopic data for the 2p6 and 2p53l configurations in Ne-like ions between Mg III and Kr XXVII
P. Jönsson; P. Bengtsson; J. Ekman; S. Gustafsson; L.B. Karlsson; G. Gaigalas; C. Froese Fischer; D. Kato; I. Murakami; H.A. Sakaue; H. Hara; T. Watanabe; N. Nakamura; N. Yamamoto
Atomic Data and Nuclear Data Tables, Elsevier BV, 100, 1, 1-154, Jan. 2014, Peer-reviwed
Scientific journal - Validation of Spectroscopic Model for Fe Ions in Non-Equilibrium Ionization Plasma in LHD and Hinode
Izumi MURAKAMI; Tetsuya WATANABE; Chihiro SUZUKI; Shigeru MORITA; Chunfeng DONG; Naoki TAMURA; Norimasa YAMAMOTO; Daiji KATO; Hiroyuki A. SAKAUE; Hirohisa HARA; Nobuyuki NAKAMURA; Shigeru SUDO
Plasma and Fusion Research, Japan Society of Plasma Science and Nuclear Fusion Research, 9, 1401056-1401056, 2014, Peer-reviwed
Scientific journal - KLL dielectronic-recombination measurement for Li-like to O-like gold
Gang Xiong; Jiyan Zhang; Zhimin Hu; Nobuyuki Nakamura; Yueming Li; Xiaoying Han; Jiamin Yang; Baohan Zhang
Physical Review A, American Physical Society (APS), 88, 4, 042704, 10 Oct. 2013, Peer-reviwed
Scientific journal - EUV spectroscopy ions of plasma light sources by use of electron beam ion trap
Hayato Ohashi; Takeshi Higashiguchi; Hiroyuki A. Sakaue; Nobuyuki Nakamura
Reports on Topical Meeting of the Laser Society of Japan, 31-35, Oct. 2013
Japanese - Observation of visible forbidden lines from highly charged tungsten ions at the large helical device
D Kato; M Goto; S Morita; I Murakami; H A Sakaue; X B Ding; S Sudo; C Suzuki; N Tamura; N Nakamura; H Watanabe; F Koike
Physica Scripta, IOP Publishing, T156, 014081-014081, 01 Sep. 2013, Peer-reviwed
Scientific journal - Visible transitions of highly charged tungsten ions observed with a compact electron beam ion trap
Maki Minoshima; Junpei Sakoda; Akihiro Komatsu; Hiroyuki A Sakaue; Xiao-Bin Ding; Daiji Kato; Izumi Murakami; Chen-Zhong Dong; Fumihiro Koike; Hirofumi Watanabe; Nobuyuki Nakamura
Physica Scripta, IOP Publishing, T156, 014010-014010, 01 Sep. 2013, Peer-reviwed
Scientific journal - Comparison between leaky and pulsed modes of ion extraction from an electron beam ion trap
Zhimin Hu; Yusuke Ishiguro; Hirofumi Watanabe; Shunsuke Ohtani; Nobuyuki Nakamura
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Elsevier BV, 298, 96-99, Mar. 2013, Peer-reviwed
Scientific journal - EBIT spectroscopy of highly charged heavy ions relevant to hot plasmas
Nobuyuki Nakamura; Xiao-Bin Ding; Chen-Zhong Dong; Hirohisa Hara; Daiji Kato; Fumihiro Koike; Izumi Murakami; Tomohide Nakano; Hayato Ohashi; Hiroyuki A. Sakaue; Hirofumi Watanabe; Tetsuya Watanabe; Norimasa Yamamoto
AIP Conference Proceedings, AIP, 1545, 62-71, 2013, Peer-reviwed
International conference proceedings - A study of tungsten spectra using large helical device and compact electron beam ion trap in NIFS
S. Morita; C. F. Dong; M. Goto; D. Kato; I. Murakami; H. A. Sakaue; M. Hasuo; F. Koike; N. Nakamura; T. Oishi; A. Sasaki; E. H. Wang
AIP Conference Proceedings, AIP, 1545, 143-152, 2013, Peer-reviwed
International conference proceedings - Spectra of highly charged Fe ions excited by electron collisions: Dependence on electron energy and density
Hiroyuki A Sakaue; Daiji Kato; Izumi Murakami; Hirohisa Hara; Tetsuya Watanabe; Norimasa Yamamoto; Hayato Ohashi; Nobuyuki Nakamura
Journal of Physics: Conference Series, IOP Publishing, 388, 6, 062011-062011, 05 Nov. 2012
Scientific journal - Lines from highly charged tungsten ions observed in the visible region between 340 and 400 nm
Hirofumi Watanabe; Nobuyuki Nakamura; Daiji Kato; Hiroyuki A. Sakaue; Shunsuke Ohtani
Canadian Journal of Physics, Canadian Science Publishing, 90, 5, 497-501, May 2012, Peer-reviwed, A spectroscopic study of highly charged tungsten ions was performed in the visible region from 340 to 400 nm with an electron beam ion trap (EBIT). The tungsten ions were produced by electron impacts in the EBIT with electrons with energies between 1 and 1.7 keV. Several lines attributed to the tungsten ions W26+ to W33+ were measured.
Scientific journal - Experimental Demonstration of the Breit Interaction which Dominates the Angular Distribution of X-ray Emission in Dielectronic Recombination
Zhimin Hu; Xiaoying Han; Yueming Li; Daiji Kato; Xiaomin Tong; Nobuyuki Nakamura
Physical Review Letters, American Physical Society (APS), 108, 7, 073002, 15 Feb. 2012, Peer-reviwed
Scientific journal - M1 transition energies and probabilities between the multiplets of the ground state of Ag-like ions withZ= 47–92
Xiao-Bin Ding; Fumihiro Koike; Izumi Murakami; Daiji Kato; Hiroyuki A Sakaue; Chen-Zhong Dong; Nobuyuki Nakamura
Journal of Physics B: Atomic, Molecular and Optical Physics, IOP Publishing, 45, 3, 035003-035003, 11 Jan. 2012, Peer-reviwed
Scientific journal - Spectroscopy of highly charged tungsten ions with Electron Beam Ion Traps
Hiroyuki A. Sakaue; Daiji Kato; Xiaobin Ding; Izumi Murakami; Fumihiro Koike; Tomohide Nakano; Norimasa Yamamoto; Hayato Ohashi; Junji Yatsurugi; Nobuyuki Nakamura
AIP Conference Proceedings, AIP, 1438, 91-96, 2012
International conference proceedings - Visible Transitions in Highly Charged Tungsten Ions: 365 - 475 nm
Akihiro KOMATSU; Junpei SAKODA; Maki MINOSHIMA; Hiroyuki A. SAKAUE; Xiao-Bin DING; Daiji KATO; Izumi MURAKAMI; Fumihiro KOIKE; Nobuyuki NAKAMURA
Plasma and Fusion Research, Japan Society of Plasma Science and Nuclear Fusion Research, 7, 1201158-1201158, 2012, Peer-reviwed
Scientific journal - INTENSITY RATIO OF DENSITY-SENSITIVE LINES IN Fe IONS OBSERVED WITH A WELL-DEFINED LABORATORY PLASMA
Nobuyuki Nakamura; Etsushi Watanabe; Hiroyuki A. Sakaue; Daiji Kato; Izumi Murakami; Norimasa Yamamoto; Hirohisa Hara; Tetsuya Watanabe
The Astrophysical Journal, American Astronomical Society, 739, 1, 17-17, 30 Aug. 2011, Peer-reviwed
Scientific journal - High resolution extreme ultraviolet spectrometer for an electron beam ion trap
Hayato Ohashi; Junji Yatsurugi; Hiroyuki A. Sakaue; Nobuyuki Nakamura
Review of Scientific Instruments, AIP Publishing, 82, 8, 083103, 01 Aug. 2011, Peer-reviwed, An extreme ultraviolet spectrometer has been developed for spectroscopic studies of highly charged ions with an electron beam ion trap. It has a slit-less configuration with a spherical varied-line-spacing grating that provides a flat focal plane for grazing incidence light. Alternative use of two different gratings enables us to cover the wavelength range 1–25 nm. Test observations with the Tokyo electron beam ion trap demonstrate the high performance of the present spectrometer such as a resolving power of above 1000.
Scientific journal - Ab initio multi-configuration Dirac–Fock calculation of M1 visible transitions among the ground state multiplets of the W26 +ion
Xiao-Bin Ding; Fumihiro Koike; Izumi Murakami; Daiji Kato; Hiroyuki A Sakaue; Chen-Zhong Dong; Nobuyuki Nakamura; Akihiro Komatsu; Junpei Sakoda
Journal of Physics B: Atomic, Molecular and Optical Physics, IOP Publishing, 44, 14, 145004-145004, 29 Jun. 2011, Peer-reviwed
Scientific journal - Structure and dynamics of highly charged heavy ions studied with the electron beam ion trap in Tokyo
Nobuyuki Nakamura; Zhimin Hu; Hirofumi Watanabe; Yueming Li; Daiji Kato; Fred J. Currell; Xiao-Min Tong; Tsutomu Watanabe; Shunsuke Ohtani
Hyperfine Interactions, Springer Science and Business Media LLC, 199, 1-3, 123-130, 15 Apr. 2011, Peer-reviwed
Scientific journal - Electron density dependence of intensity ratio for FeXXII extreme ultraviolet emission lines arising from different ground levels in electron beam ion trap and large helical device
H. A. Sakaue; N. Yamamoto; S. Morita; N. Nakamura; C. Chen; D. Kato; H. Kikuchi; I. Murakami; S. Ohtani; H. Tanuma; T. Watanabe; H. Tawara
Journal of Applied Physics, AIP Publishing, 109, 7, 073304-073304, Apr. 2011, Peer-reviwed
Scientific journal - Characterization and parametrization in terms of atomic number of x-ray emission from K -shell filling during ion-surface interactions
S. J. McMahon; A. P. Kavanagh; H. Watanabe; J. Sun; M. Tona; N. Nakamura; S. Ohtani; F. J. Currell
Physical Review A, American Physical Society (APS), 83, 2, 022901, 28 Feb. 2011, Peer-reviwed
Scientific journal - Visible spectroscopy of Rh-like ions
Junpei Sakoda; Akihiro Komatsu; Hiroyuki Kikuchi; Nobuyuki Nakamura
Physica Scripta T, T144, 2011, Peer-reviwed, The visible transition of a multiply charged Ba ion was observed by using an electron beam ion trap. From the dependence of the line intensity on electron beam energy, it is identified as a magnetic dipole transition between ground-state fine-structure levels (4d92D5/2- 2D3/2) of Rh-like Ba. The wavelength determined from the present experiment is compared with the existing theoretical values as well as the indirect experimental value estimated from the wavelength difference between previously reported VUV transitions 4d85p-4d92D 5/2 and 2D3/2. © 2011 The Royal Swedish Academy of Sciences.
International conference proceedings, English - Two-photon observations of dielectronic recombination processes
Zhi-Min Hu; Yue-Ming Li; Akira Yamazaki; Nobuyuki Nakamura
Physica Scripta T, T144, 2011, Peer-reviwed, We present here coincidence measurements for two K x-rays emitted in the dielectronic recombination process of hydrogen-like krypton. We report the first observation of clear coincidence signals obtained from two Ge detectors placed in such a way that the Tokyo electron beam ion trap was between them. The doubly differential cross section is obtained by normalizing the coincidence counts to the radiative recombination x-ray counts. © 2011 The Royal Swedish Academy of Sciences.
International conference proceedings, English - Visible spectroscopy of highly charged tungsten ions
Akihiro Komatsu; Junpei Sakoda; Nobuyuki Nakamura; Hiroyuki A. Sakaue; Xiao-Bin Ding; Daiji Kato; Izumi Murakami; Fumihiro Koike
Physica Scripta T, T144, 2011, Peer-reviwed, We present visible spectra of highly charged tungsten ions observed by using a compact electron beam ion trap. The newly observed lines and the ions responsible for them, identified by the electron energy dependence of the lines, are presented. Theoretical calculations performed for the detailed identification of the lines are also presented. Finally, the experimental and the theoretical results are compared. © 2011 The Royal Swedish Academy of Sciences.
International conference proceedings, English - Database and Related Activities in Japan
Izumi Murakami; Daiji Kato; Masatoshi Kato; Hiroyuki A. Sakaue; Takako Kato; Xiaobin Ding; Shigeru Morita; Masashi Kitajima; Fumihiro Koike; Nobuyuki Nakamura; Naoki Sakamoto; Akira Sasaki; Igor Skobelev; Hidetsugu Tsuchida; Artemiy Ulantsev; Tetsuya Watanabe; Norimasa Yamamoto
AIP Conference Proceedings, AIP, 1344, 96-106, 2011, Peer-reviwed
International conference proceedings - A compact EBIT for spectroscopic studies of moderate charge state ions
H A Sakaue; N Nakamura; E Watanabe; A Komatsu; T Watanabe
Journal of Instrumentation, IOP Publishing, 5, 08, C08010-C08010, 24 Aug. 2010, Peer-reviwed
Scientific journal - Activities at the Tokyo EBIT 2010
N Nakamura; F J Currell; Z Hu; D Kato; A Komatsu; Y Li; I Murakami; H Ohashi; S Ohtani; H A Sakaue; M Sakurai; M Tona; X -M Tong; H Watanabe; T Watanabe; T Watanabe; C Yamada; N Yamamoto; A Yamazaki
Journal of Instrumentation, IOP Publishing, 5, 08, C08007-C08007, 18 Aug. 2010, Peer-reviwed
Scientific journal - Dielectronic recombination in He-like, Li-like, and Be-like highly charged ions in the KLL and KLM manifolds
A. P. Kavanagh; H. Watanabe; Y. M. Li; B. E. O’Rourke; H. Tobiyama; N. Nakamura; S. McMahon; C. Yamada; S. Ohtani; F. J. Currell
Physical Review A, American Physical Society (APS), 81, 2, 022712, 17 Feb. 2010, Peer-reviwed
Scientific journal - Development and application of highly charged ion source
Makoto Sakurai; Hiroyuki Onishi; Ken Asakura; Masahide Tona; Hirofumi Watanabe; Nobuyuki Nakamura; Shunsuke Ohtani; Toshifumi Terui; Shinro Mashiko; Hiroyuki A. Sakaue
Vacuum, Elsevier BV, 84, 5, 530-533, Dec. 2009, Peer-reviwed
Scientific journal - Green’s function for multielectron ions and its application to radiative recombination involving dielectronic recombinations
X. M. Tong; N. Nakamura; S. Ohtani; T. Watanabe; N. Toshima
Physical Review A, American Physical Society (APS), 80, 4, 042502, 06 Oct. 2009, Peer-reviwed
Scientific journal - Asymmetric profiles observed in the recombination of Bi79 + : A benchmark for relativistic theories involving interference
Nobuyuki Nakamura; Anthony P. Kavanagh; Hirofumi Watanabe; Hiroyuki A. Sakaue; Yueming Li; Daiji Kato; Fred J. Currell; Xiao-Min Tong; Tsutomu Watanabe; Shunsuke Ohtani
Physical Review A, American Physical Society (APS), 80, 1, 014503, 31 Jul. 2009, Peer-reviwed
Scientific journal - Guiding and blocking of highly charged ions through a single glass capillary
R. Nakayama; M. Tona; N. Nakamura; H. Watanabe; N. Yoshiyasu; C. Yamada; A. Yamazaki; S. Ohtani; M. Sakurai
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Elsevier BV, 267, 14, 2381-2384, Jul. 2009, Peer-reviwed
Scientific journal - Analysis of EUV spectra from highly charged iron ions with a compact EBIT
N Yamamoto; H A Sakaue; D Kato; I Murakami; T Kato; N Nakamura; E Watanabe; H Nishimura; T Watanabe
Journal of Physics: Conference Series, IOP Publishing, 163, 012023-012023, 01 Apr. 2009, Peer-reviwed
Scientific journal - Complementary spectroscopy of tin ions using ion and electron beams
H Ohashi; S Suda; H Tanuma; S Fujioka; H Nishimura; K Nishihara; T Kai; A Sasaki; H A Sakaue; N Nakamura; S Ohtani
Journal of Physics: Conference Series, IOP Publishing, 163, 012071-012071, 01 Apr. 2009, Peer-reviwed
Scientific journal - Development and applications of electron beam ion source for nanoprocesses
M Sakurai; M Tona; H Watanabe; Nobuyuki Nakamura; Shunsuke Ohtani; T Terui; S Mashiko; H A Sakaue
Journal of Physics: Conference Series, IOP Publishing, 163, 012115-012115, 01 Apr. 2009, Peer-reviwed
Scientific journal - Fe XIII DENSITY DIAGNOSTICS IN THE EIS OBSERVING WAVELENGTHS
T. Watanabe; H. Hara; N. Yamamoto; D. Kato; H. A. Sakaue; I. Murakami; T. Kato; N. Nakamura; P. R. Young
The Astrophysical Journal, American Astronomical Society, 692, 2, 1294-1304, 20 Feb. 2009, Peer-reviwed
Scientific journal - ‘Programming’ Electron Beam Ion Traps To Produce Atomic Data Relevant To Plasma Physics
Fred Currell; Brian O’Rourke; Anthony Kavanagh; Yueming Li; Nobuyuki Nakamura; Shunsuke Ohtani; Hirofumi Watanabe; Kevin B. Fournier
AIP Conference Proceedings, AIP, 1161, 87-94, 2009, Peer-reviwed
International conference proceedings - Collision Processes of Highly Charged Ions with Electrons Studied with an Electron Beam Ion Trap
Nobuyuki Nakamura; Anthony P. Kavanagh; Hirofumi Watanabe; Hiroyuki A. Sakaue; Yueming Li; Daiji Kato; Fred J. Currell; Xiao-Ming Tong; Tsutomu Watanabe; Shunsuke Ohtani; Kevin B. Fournier
AIP Conference Proceedings, AIP, 1161, 96, 2009, Peer-reviwed
International conference proceedings - Measurement of the QED energy shift in the 1s2 2p3 ∕ 2 – 1s2 2s1 ∕ 2 x-ray transition in Li-like 208Pb79+
Xuemei Zhang; Nobuyuki Nakamura; Chongyang Chen; Martin Andersson; Yong Liu; Shunsuke Ohtani
Physical Review A, American Physical Society (APS), 78, 3, 032504, 04 Sep. 2008
Scientific journal - Compact electron beam ion trap for spectroscopy of moderate charge state ions
Nobuyuki Nakamura; Hiroyuki Kikuchi; Hiroyuki A. Sakaue; Tetsuya Watanabe
Review of Scientific Instruments, AIP Publishing, 79, 6, 063104, 01 Jun. 2008, Peer-reviwed, A compact electron beam ion trap (EBIT) has been constructed for spectroscopic studies of moderate charge state ions. The electron beam energy range of the present EBIT is 100–1000eV, for which it is rather difficult to operate an ordinary EBIT which used to be designed for operation with higher electron energy (∼10keV or more). To cut down the running costs, a superconducting wire with a high critical temperature is used for the central magnet so that it can be operated without liquid helium. The performance of the compact EBIT has been investigated through visible spectroscopy of highly charged krypton and iron ions.
Scientific journal - Fluorescence of an organic-dye thin film by interaction with individual slow highly charged ions
Masahide Tona; Takashi Abe; Hirofumi Watanabe; Jian Sun; Nobuyuki Nakamura; Chikashi Yamada; Masahiro Kotani; Shunsuke Ohtani
Physical Review A, American Physical Society (APS), 77, 5, 052902, 27 May 2008, Peer-reviwed
Scientific journal - K and L x-ray emission from hollow atoms produced in the interaction of slow H-like ( I 52 + ) and bare ( I 53 + ) ions with different target materials
Jian Sun; Hirofumi Watanabe; Masahide Tona; Tsutomu Watanabe; Nobuyuki Nakamura; Chikashi Yamada; Shunsuke Ohtani
Physical Review A, American Physical Society (APS), 77, 3, 032901, 03 Mar. 2008
Scientific journal - Spectroscopy of Highly Charged Ion with an EBIT
H.A. Sakaue; H. Kikuchi; N. Nakamura; S. Ohtani; H. Tanuma; N. Yamamoto; D. Kato; T. Kato; H. Hara; T. Watanabe
Proc. of Japan-China Joint Seminar on Atomic and Molecular Processes in Plasma: NIFS-PROC, 73, 54, Mar. 2008
International conference proceedings, English - Resonant Processes in Electron-Highly Charged Ion Collisions Observed with the Tokyo Electron Beam Ion Trap
N. Nakamura; A.P. Kavanagh; H. Watanabe; H.A. Sakaue; Y.M. Li; D. Kato; F.J. Currell; S. Ohtani
Proc. of Japan-China Joint Seminar on Atomic and Molecular Processes in Plasma: NIFS-PROC, 73, 123, Mar. 2008
International conference proceedings, English - Evidence for Strong Breit Interaction in Dielectronic Recombination of Highly Charged Heavy Ions
Nobuyuki Nakamura; Anthony P. Kavanagh; Hirofumi Watanabe; Hiroyuki A. Sakaue; Yueming Li; Daiji Kato; Fred J. Currell; Shunsuke Ohtani
Physical Review Letters, American Physical Society (APS), 100, 7, 073203, 22 Feb. 2008, Peer-reviwed
Scientific journal - Two-electron QED contributions to the ground-state binding energy in He-like Kr34+ ions
P. H. Mokler; J. R. Crespo López-Urrutia; F. J. Currell; N. Nakamura; S. Ohtani; C. J. Osborne; H. Tawara; J. Ullrich; H. Watanabe
Physical Review A, American Physical Society (APS), 77, 1, 012506, 17 Jan. 2008, Peer-reviwed
Scientific journal - Growth of ionization balance from F-like to bare ions of heavy atoms in an electron beam ion trap
Jian Sun; Nobuyuki Nakamura; Masahide Tona; Chikashi Yamada; Hirofumi Watanabe; Shunsuke Ohtani; Yunqing Fu
Plasma and Fusion Research, vol 3. 052-1--6 (2008), 3, 052-1--6, 2008, Peer-reviwed
Scientific journal, English - Recent activities at the Tokyo EBIT 2006
N Nakamura; F J Currell; D Kato; A P Kavanagh; Y M Li; S Ohtani; H A Sakaue; M Sakurai; J Sun; S Takahashi; M Tona; H Watanabe; C Yamada; N Yoshiyasu
Canadian Journal of Physics, Canadian Science Publishing, 86, 1, 315-319, 01 Jan. 2008, Peer-reviwed, The electron beam ion trap (EBIT) in Tokyo was constructed about 10 years after the first EBIT at Lawrence Livermore National Laboratory was built, and has been being stably operated since then. In this paper, we present recent experimental activities at the Tokyo EBIT. In particular, experiments utilizing slow, very highly charged ion beams extracted from the EBIT are reported. PACS Nos.: 39.10.+j, 32.30.Rj, 34.50.Dy, 34.80.Kw
Scientific journal - Relativistic effects on resonant interactions between electrons and highly charged ions
N Nakamura; A P Kavanagh; H Watanabe; H A Sakaue; Y Li; D Kato; F J Currell; S Ohtani
Journal of Physics: Conference Series, IOP Publishing, 88, 012066-012066, 01 Nov. 2007, Peer-reviwed
Scientific journal - X-ray emission in collisions of highly charged I, Pr, Ho, and Bi ions with a W surface
H. Watanabe; J. Sun; M. Tona; N. Nakamura; M. Sakurai; C. Yamada; N. Yoshiyasu; S. Ohtani
Physical Review A, American Physical Society (APS), 75, 6, 062901, 01 Jun. 2007, Peer-reviwed
Scientific journal - Activities at the Tokyo-EBIT 2005
Nakamura Nobuyuki; Nagata Kazuo; Ohtani Shunsuke; Sakurai Makoto; Takahashi Satoshi; Tona Masahide; Yamada Chikashi; Yoshiyasu Nobuo
Journal of Physics: Conference Series, IOP Publishing, 72, 012005-012005, 01 Jun. 2007, Peer-reviwed
Scientific journal - Potential sputtering from a Si surface by very highly charged ion impact
Masahide Tona; Hirofumi Watanabe; Satoshi Takahashi; Nobuyuki Nakamura; Nobuo Yoshiyasu; Makoto Sakurai; Chikashi Yamada; Shunsuke Ohtani
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Elsevier BV, 258, 1, 163-166, May 2007, Peer-reviwed
Scientific journal - Nano-scale surface modification of materials with slow, highly charged ion beams
M. Sakurai; M. Tona; S. Takahashi; H. Watanabe; N. Nakamura; N. Yoshiyasu; C. Yamada; S. Ohtani; H.A. Sakaue; Y. Kawase; K. Mitsumori; T. Terui; S. Mashiko
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Elsevier BV, 257, 1-2, 297-300, Apr. 2007, Peer-reviwed
Scientific journal - Interference between dielectronic and radiative recombination in electron - highly charged Bi collisions
Hirotsugu Tobiyama; Hiroaki Nohara; Anthony P Kavanagh; Nobuyuki Nakamura; Hirofumi Watanabe; Hiroyuki A Sakaue; Yueming Li; Daiji Kato; Fred J Currell; Chikashi Yamada; Shunsuke Ohtani
Journal of Physics: Conference Series, IOP Publishing, 58, 239-242, 01 Mar. 2007, Peer-reviwed
Scientific journal - Resonant electron processes with open-shell highly charged ion targets
Nobuyuki Nakamura; Hirotsugu Tobiyama; Hiroaki Nohara; Anthony P Kavanagh; Hirofumi Watanabe; Hiroyuki A Sakaue; Yueming Li; Daiji Kato; Fred J Currell; Chikashi Yamada; Shunsuke Ohtani
Journal of Physics: Conference Series, IOP Publishing, 58, 267-270, 01 Mar. 2007, Peer-reviwed
Scientific journal - Observation of HCI-induced nanostructures with a scanning probe microscope
Masahide Tona; Hirofumi Watanabe; Satoshi Takahashi; Yuso Fujita; Takashi Abe; Sun Jian; Nobuyuki Nakamura; Nobuo Yoshiyasu; Chikashi Yamada; Makoto Sakurai; Shunsuke Ohtani
Journal of Physics: Conference Series, IOP Publishing, 58, 331-334, 01 Mar. 2007, Peer-reviwed
Scientific journal - Injection of refractory metals into EBIT using a Knudsen cell
C Yamada; K Nagata; N Nakamura; S Ohtani; S Takahashi; H Tobiyama; M Tona; H Watanabe; N Yoshiyasu; M Sakurai; A P Kavanagh; F J Currell
Journal of Physics: Conference Series, IOP Publishing, 58, 403-406, 01 Mar. 2007, Peer-reviwed
Scientific journal - Radiation from K-shell filling in highly charged ions: a driver for resonant combination cancer therapy?
A P Kavanagh; J D Gillaspy; D G Hirst; M H Mendenhall; N Nakamura; S Ohtani; H Watanabe; F J Currell
Journal of Physics: Conference Series, IOP Publishing, 58, 439-442, 01 Mar. 2007, Peer-reviwed
Scientific journal - Nanofabrication on a Si surface by slow highly charged ion impact
Masahide Tona; Hirofumi Watanabe; Satoshi Takahashi; Nobuyuki Nakamura; Nobuo Yoshiyasu; Makoto Sakurai; Toshifumi Terui; Shinro Mashiko; Chikashi Yamada; Shunsuke Ohtani
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Elsevier BV, 256, 1, 543-546, Mar. 2007
Scientific journal - Nano-crater formation on a Si(111)-(7×7) surface by slow highly charged ion-impact
Masahide Tona; Hirofumi Watanabe; Satoshi Takahashi; Nobuyuki Nakamura; Nobuo Yoshiyasu; Makoto Sakurai; Toshifumi Terui; Shinro Mashiko; Chikashi Yamada; Shunsuke Ohtani
Surface Science, Elsevier BV, 601, 3, 723-727, Feb. 2007
Scientific journal - Production and extraction of highly charged ions from Tokyo EBIT
Yunqing Fu; Jian Sun; Makoto Sakurai; Nobuyuki Nakamura; Masahide Tona; Hirofumi Watanabe; Chikashi Yamada; Nobuo Yoshiyasu; Shunsuke Ohtani
Plasma and Fusion Research, 2, 028 1-3, 2007, Peer-reviwed
Scientific journal, English - Autoionization states in xenon investigated by electron impact
Z-S Yuan; Y Sakai; N Umeda; Y Fujita; T Takayanagi; C Yamada; N Nakamura; S Ohtani; L-F Zhu; K-Z Xu
Journal of Physics B: Atomic, Molecular and Optical Physics, IOP Publishing, 39, 24, 5097-5103, 23 Nov. 2006, Peer-reviwed
Scientific journal - Investigation of resonant inner-shell processes with an electron beam ion trap
Nobuyuki Nakamura; Hirotsugu Tobiyama; Hiroaki Nohara; Daiji Kato; Hirofumi Watanabe; Fred J. Currell; Shunsuke Ohtani
Radiation Physics and Chemistry, Elsevier BV, 75, 11, 1749-1752, Nov. 2006, Peer-reviwed
Scientific journal - Dissipation of potential energy through x-ray emission in slow highly charged ion-surface collisions
H. Watanabe; S. Takahashi; M. Tona; N. Yoshiyasu; N. Nakamura; M. Sakurai; C. Yamada; S. Ohtani
Physical Review A, American Physical Society (APS), 74, 4, 042901, 27 Oct. 2006, Peer-reviwed
Scientific journal - Injection of metallic elements into an electron-beam ion trap using a Knudsen cell
C. Yamada; K. Nagata; N. Nakamura; S. Ohtani; S. Takahashi; T. Tobiyama; M. Tona; H. Watanabe; N. Yoshiyasu; M. Sakurai; A. P. Kavanagh; F. J. Currell
Review of Scientific Instruments, AIP Publishing, 77, 6, 066110, 01 Jun. 2006, Peer-reviwed, A method of injecting metallic elements into an electron-beam ion trap (EBIT) is described. The method is advantageous over the conventional coaxial and pulsed injection methods in two ways: (a) complicated switching of injection and extraction beams can be avoided when extracting beams of highly charged ions from the EBIT and (b) a beam of stable intensity can be achieved. This method may be applicable to any metallic elements or metallic compounds that have vapor pressures of ∼0.1Pa at a temperature lower than 1900°C. We have employed this method for the extraction of highly charged ions of Bi, Er, Fe, and Ho.
Scientific journal - Observation of resonant-excitation double autoionization in electron-I50+ collisions
Nobuyuki Nakamura; Hirotsugu Tobiyama; Hiroaki Nohara; Daiji Kato; Hirofumi Watanabe; Fred J. Currell; Shunsuke Ohtani
Physical Review A, American Physical Society (APS), 73, 2, 020705, 21 Feb. 2006, Peer-reviwed
Scientific journal - Demonstrative Experiment for Single-Ion Implantation Technique Using Highly Charged Ions
Nobuo Yoshiyasu; Satoshi Takahashi; Masa-aki Shibata; Hiroshi Shimizu; Kazuo Nagata; Nobuyuki Nakamura; Masahide Tona; Makoto Sakurai; Chikashi Yamada; Shunsuke Ohtani
Japanese Journal of Applied Physics, IOP Publishing, 45, 2A, 995-997, 08 Feb. 2006, Peer-reviwed
Scientific journal - Some characteristics in the interaction of slow highly charged Iq+ ions with a Si(111) 1×1-H surface
Masahide Tona; Kazuo Nagata; Satoshi Takahashi; Nobuyuki Nakamura; Nobuo Yoshiyasu; Makoto Sakurai; Chikashi Yamada; Shunsuke Ohtani
Surface Science, Elsevier BV, 600, 1, 124-132, Jan. 2006, Peer-reviwed
Scientific journal - Surface modification on highly oriented pyrolytic graphite by slow highly charged ions
Yukari Baba; Kazuo Nagata; Satoshi Takahashi; Nobuyuki Nakamura; Nobuo Yoshiyasu; Makoto Sakurai; Chikashi Yamada; Shunsuke Ohtani; Masahide Tona
Surface Science, Elsevier BV, 599, 1-3, 248-254, Dec. 2005
Scientific journal - Coulomb explosion potential sputtering induced by slow highly charged ion impact
Masahide Tona; Satoshi Takahashi; Kazuo Nagata; Nobuo Yoshiyasu; Chikashi Yamada; Nobuyuki Nakamura; Shunsuke Ohtani; Makoto Sakurai
Applied Physics Letters, AIP Publishing, 87, 22, 224102, 21 Nov. 2005, Peer-reviwed, We have observed secondary ion emission from a hydrogen-terminated Si(111) 1×1 surface and a native SiO2 thin film on the Si substrate (SiO2∕Si) irradiated with slow (vion<vBohr) iodine highly charged ions (HCIs) in a wide range of charge state q from q=15 up to 50. The yields of secondary ions evaluated from time-of-flight mass spectra showed rapid increases with q of the projectile. The relation of the yields to the potential energy of HCIs is discussed in terms of the Coulomb explosion model. It was found that the simultaneous emission of multiple Si+ ions occurs in an event of a single high-q HCI impact onto the SiO2∕Si.
Scientific journal - DIET in highly charged ion interaction with silicon surfaces
S. Takahashi; K. Nagata; M. Tona; M. Sakurai; N. Nakamura; C. Yamada; S. Ohtani
Surface Science, Elsevier BV, 593, 1-3, 318-323, Nov. 2005, Peer-reviwed
Scientific journal - Toward over unity proton sputtering yields from a hydrogen-terminated Si(111) 1×1 surface irradiated by slow highly charged Xe ions
Satoshi Takahashi; Masahide Tona; Kazuo Nagata; Nobuyuki Nakamura; Nobuo Yoshiyasu; Chikashi Yamada; Shunsuke Ohtani; Makoto Sakurai
Applied Physics Letters, AIP Publishing, 87, 6, 063111, 03 Aug. 2005, Peer-reviwed, The emission of sputtered ions from a hydrogen-terminated Si(111) 1×1 surface has been measured for impact of slow (v<0.25vBohr) highly charged Xe ions. Proton sputtering yields increase strongly with projectile charge q (qγ;γ∼4) and reach to the value greater than one for Xeq+ impact (q≧44). Yields of Si+ remain constant (∼0.1) for lower q (14≦q≦29) but increase with q for higher q region which shows that the apparent Coulomb explosion-like potential sputtering might set in and enhances the sputtering yield drastically over q=29.
Scientific journal - Dielectronic recombination of hydrogen-like ions
H. Watanabe; A.P. Kavanagh; H. Kuramoto; Y.M. Li; N. Nakamura; S. Ohtani; B.E. O’Rourke; A. Sato; H. Tawara; X.M. Tong; F.J. Currell
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Elsevier BV, 235, 1-4, 261-264, Jul. 2005, Peer-reviwed
Scientific journal - In and ex situ optical spectroscopy of HCI-bombarded solid surfaces
Masahide Tona; Yukari Baba; Satoshi Takahashi; Kazuo Nagata; Nobuyuki Nakamura; Nobuo Yoshiyasu; Chikashi Yamada; Shunsuke Ohtani
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Elsevier BV, 235, 1-4, 443-447, Jul. 2005, Peer-reviwed
Scientific journal - Observation of an HCI-induced nano-dot on an HOPG surface with STM and AFM
Masashi Terada; Nobuyuki Nakamura; Yoichi Nakai; Yasuyuki Kanai; Shunsuke Ohtani; Ken-ichiro Komaki; Yasunori Yamazaki
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Elsevier BV, 235, 1-4, 452-455, Jul. 2005, Peer-reviwed
Scientific journal - Observation of surface modification and secondary particle emission in HCI–surface interaction
Satoshi Takahashi; Masahide Tona; Kazuo Nagata; Nobuo Yoshiyasu; Nobuyuki Nakamura; Makoto Sakurai; Chikashi Yamada; Shunsuke Ohtani
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Elsevier BV, 235, 1-4, 456-459, Jul. 2005, Peer-reviwed
Scientific journal - Development of electron beam ion source for nanoprocess using highly charged ions
Makoto Sakurai; Fumiharu Nakajima; Takunori Fukumoto; Nobuyuki Nakamura; Shunsuke Ohtani; Shinro Mashiko; Hiroyuki Sakaue
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Elsevier BV, 235, 1-4, 519-523, Jul. 2005, Peer-reviwed
Scientific journal - Secondary ion emission from solid surfaces irradiated with highly charged ions
Masahide Tona; Kazuo Nagata; Satoshi Takahashi; Nobuyuki Nakamura; Nobuo Yoshiyasu; Makoto Sakurai; Chikashi Yamada; Shunsuke Ohtani
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Elsevier BV, 232, 1-4, 249-253, May 2005, Peer-reviwed
Scientific journal - SPM observation of nano-dots induced by slow highly charged ions
Nobuyuki Nakamura; Masashi Terada; Yoichi Nakai; Yasuyuki Kanai; Shunsuke Ohtani; Ken-ichiro Komaki; Yasunori Yamazaki
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Elsevier BV, 232, 1-4, 261-265, May 2005, Peer-reviwed
Scientific journal - EBIT (Electron Beam Ion Trap) potential for atomic data production
N Nakamura; S Ohtani
AIP Conference Proceedings, AMER INST PHYSICS, 771, 209-218, 2005, Peer-reviwed, An electron beam ion trap (EBIT) is a versatile device for studying the physics of highly charged ions. Since the first EBIT was developed about 15 years ago, about 10 EBITs have been constructed in the world and many atomic data for highly charged ions have been accumulated by using them. The data contain various important information which can be obtained only with an EBIT. This paper presents the potential of an EBIT for atomic data production by introducing some results obtained with EBITs.
International conference proceedings, English - Compact electron beam ion source with high-TC bulk superconductors
Nobuyuki Nakamura; Yoichi Nakai; Yasuyuki Kanai; Ken-ichiro Komaki; Atsumi Endo; Yasunori Yamazaki
Review of Scientific Instruments, AIP Publishing, 75, 9, 3034-3038, 01 Sep. 2004, Peer-reviwed, We have developed an electron beam ion source (EBIS) assembling three rings made of high-TC superconductor as a solenoid coil, which enables us to construct a “table-top” EBIS operated at the liquid N2 temperature with a strong magnetic field. Optimizing a pulse field magnetization procedure, the assembly yielded a magnetic field as high as 0.8 T under a persistent mode, which stably lasted more than two days. An electron beam of 12 keV-50 mA was compressed to a current density of about 300 A/cm2 and guided by the magnetic field along the axis of the drift tube. After exiting the drift tube, the electron beam was decelerated to 2 keV and collected with an electron collector with an efficiency of more than 99%. We have succeeded in extracting highly charged ions such as Ar17+ and Xe42+.
Scientific journal - Application of bulk high-TCsuperconductors to electron beam ion sources: present status and outlook
Nobuyuki Nakamura; Masashi Terada; Atsumi Endo; Yoichi Nakai; Yasuyuki Kanai; Ken-ichiro Komaki; Yasunori Yamazaki
Journal of Physics: Conference Series, IOP Publishing, 2, 1-8, 01 Jan. 2004, Peer-reviwed
Scientific journal - Electron transfer and decay processes of highly charged iodine ions
Hiroyuki A Sakaue; Atsunori Danjo; Kazumoto Hosaka; Daiji Kato; Masahiro Kimura; Atsushi Matsumoto; Nobuyuki Nakamura; Shunsuke Ohtani; Makoto Sakurai; Hiroyuki Tawara; Ichihiro Yamada; Masuhiro Yoshino
Journal of Physics B: Atomic, Molecular and Optical Physics, IOP Publishing, 37, 2, 403-415, 17 Dec. 2003, Peer-reviwed
Scientific journal - X-ray spectroscopy of high- Z highly charged ions with the Tokyo EBIT
Nobuyuki Nakamura; Daiji Kato; Shunsuke Ohtani
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Elsevier BV, 205, 57-61, May 2003, Peer-reviwed
Scientific journal - A compact electron beam ion source equipped with a bulk high- T c superconductor solenoid
Atsumi Endo; Nobuyuki Nakamura; Yasuyuki Kanai; Yoichi Nakai; Ken-ichiro Komaki; Yasunori Yamazaki
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Elsevier BV, 205, 187-190, May 2003, Peer-reviwed
Scientific journal - X-ray spectroscopy on neon-like heavy ions
N Nakamura; D Kato; S Ohtani
X-ray and Inner-Shell Processes, AMER INST PHYSICS, 652, 291-300, 2003, Peer-reviwed, The atomic structure and electron-impact-excitation processes of neonlike heavy ions have been systematically investigated through X-ray spectroscopy with the Tokyo electron beam ion trap. Several n = 3-2 transitions for Z = 50 to 56 were observed with a flat crystal spectrometer. From the observed spectra, wavelengths and relative line intensities were obtained as functions of Z and electron energy. Through the wavelength measurements, strong configuration interaction among n = 3 excited levels were investigated, while the electron-impact-excitation processes were investigated through the line intensity measurements. Theoretical calculation has also been performed to reproduce the experimental spectra. The theoretical results were found to agree well with the experiment both for wavelength and for line intensity. Near future plan with a new spectrometer which is recently developed for hard X-rays (> 15 keV) are also presented.
International conference proceedings, English - Intensity ratio between Lyman-alpha1 and -alpha2 lines of hydrogenlike titanium observed in an electron-beam ion trap
Nobuyuki Nakamura; Daiji Kato; Nozomu Miura; Tetsuro Nakahara; Shunsuke Ohtani
Physical Review A, American Physical Society (APS), 63, 2, 024501, 04 Jan. 2001, Peer-reviwed
Scientific journal - Analysis of Dielectronic Recombination Transitions for Highly Charged Iron Ions
Y.M., Li; D., Kato; X.M., Tong; H; Watanabe; B., O'Rourke; H., Kuramoto; N., Nakamura; F.J., Currell; C., Yamada; S., Ohtani
J. Plasma and Fusion Res., 12, 1175-1176, Jan. 2001, Peer-reviwed
Scientific journal, English - Large area flat crystal x-ray spectrometer with high integrated intensity for an electron beam ion trap
Nobuyuki Nakamura
Review of Scientific Instruments, AIP Publishing, 71, 11, 4065-4069, 01 Nov. 2000, Peer-reviwed, A flat crystal x-ray spectrometer has been constructed for spectroscopic studies of highly charged ions with an electron beam ion trap. It consists of a flat crystal and a position sensitive proportional counter. Employment of a flat crystal yields easy alignment, easy processing of the crystal, and high flexibility. The proportional counter has been designed to have a large effective area, which is needed to compensate for weak focusing power of a flat crystal. The utility of the new spectrometer has been demonstrated with the Tokyo electron beam ion trap.
Scientific journal - Systematic study on multi-electron atomic structures along isoelectronic sequences with highly charged ions
D. Kato; X.-M. Tong; N. Nakamura; H. Watanabe; C. Yamada; S. Ohtani; T. Watanabe
25th Annual Meeting of Atomic Collision Research Association, Okazaki, Aichi, Japan, Aug. 2000
English - Application to argon ions of a new technique to measure the two-electron contribution to the ground state energy of helium-like ions
F J Currell; J Asada; T V Back; C Z Dong; H S Margolis; N Nakamura; S Ohtani; J D Silver; H Watanabe
Journal of Physics B: Atomic, Molecular and Optical Physics, IOP Publishing, 33, 4, 727-734, 03 Feb. 2000, Peer-reviwed
Scientific journal - Injection of various metallic elements into an electron beam ion trap: Techniques needed for systematic investigations of isoelectronic sequences
Nobuyuki Nakamura; Tohru Kinugawa; Hiroshi Shimizu; Hirofumi Watanabe; Satoshi Ito; Shunsuke Ohtani; Chikashi Yamada; Kiyohiko Okazaki; Makoto Sakurai; Michael R. Tarbutt; Joshua D. Silver
Review of Scientific Instruments, AIP Publishing, 71, 2, 684-686, Feb. 2000, Peer-reviwed
Scientific journal - High energy operation of the Tokyo-electron beam ion trap/present status
Hideharu Kuramoto; Hiroshi Shimizu; Nobuyuki Nakamura; Fredric J. Currell; Daiji Kato; Tohru Kinugawa; Xiao M. Tong; Hirofumi Watanabe; Tsunemitsu Fukami; Yueming Li; Shunsuke Ohtani; Emma J. Sokell; Chikashi Yamada; Takato Hirayama; Kenji Motohashi; Seiji Tsurubuchi; Kiyohiko Okazaki; Makoto Sakurai; Michael R. Tarbutt; Joshua D. Silver
Review of Scientific Instruments, AIP Publishing, 71, 2, 687-689, Feb. 2000, Peer-reviwed
Scientific journal - Evidence for strong configuration mixing in n=3 excited levels in neonlike ions
Nobuyuki Nakamura; Daiji Kato; Shunsuke Ohtani
Physical Review A - Atomic, Molecular, and Optical Physics, AMERICAN PHYSICAL SOC, 61, 5, 052510, 2000, Peer-reviwed, Wavelengths have been measured for x-ray transitions from the excited states with strong configuration mixing between [Formula Presented] and [Formula Presented] to the ground states in neonlike [Formula Presented] [Formula Presented] and [Formula Presented] The measurements were made with a flat crystal spectrometer on the Tokyo electron beam ion trap. The experimental wavelengths are compared to theoretical values calculated with the multiconfigurational Dirac-Fock method and other existing theoretical results. Using the present results, the degree of mixing in the wave functions between the two excited electronic configurations is investigated. The present investigation gives a clear demonstration for strong configuration mixing in highly charged ions through observation of an avoided crossing. © 2000 The American Physical Society.
Scientific journal, English - Studies on atomic property change as functions of Z along Ne-like and Ti-like sequences
D. Kato; X.-M. Tong; N. Nakamura; H. Watanabe; C. Yamada; S. Ohtani; T. Watanabe
Atomic Collision Research in Japan - Progress Report, 26, 117-119, 2000
English - A new method for nondestructively monitoring the position of a charged particle beam in real time
J. Asada; F. J. Currell; T. Fukami; N. Nakamura; E. Nojikawa; S. Ohtani; H. Watanabe
Review of Scientific Instruments, AIP Publishing, 70, 5, 2288-2292, 01 May 1999, Peer-reviwed, The design and construction of a simple new device for nondestructively monitoring the position of an electron beam is described. By modulating a small portion of the electron-beam current, changes in the amounts of charge induced on the monitor electrodes are detected as currents. These currents are related to the location of the “center of charge” of the electron beam. Calculations and experimental results which illustrate the performance of the device are reported. This device is primarily intended for use in electron-beam ion sources and traps, although it could be applied to other situations where the beam current can be modulated.
Scientific journal - High-resolution x-ray spectromicroscopy with the Tokyo electron beam ion trap
N. Nakamura; A. Ya. Faenov; T. A. Pikuz; E. Nojikawa; H. Shiraishi; F. J. Currell; S. Ohtani
Review of Scientific Instruments, AIP Publishing, 70, 3, 1658-1664, 01 Mar. 1999, Peer-reviwed, A high-resolution x-ray spectrometer with a spherically bent quartz crystal and an x-ray sensitive charge coupled device (CCD) have been applied to the observation of highly charged ions produced and trapped in the Tokyo electron beam ion trap (EBIT). The spectrometer made it possible to measure the spatial distribution and wavelength of the radiation at the same time. A simple, but lower energy resolution method was also used, by taking advantage of the intrinsic energy resolution of the CCD. The possibility to apply such techniques to diagnostics of an EBIT is discussed.
Scientific journal - Spectroscopic observation for electron impact excitations of highly charged Ne-like ions
N Nakamura; D Kato; S Ohtani
X-RAY LASERS 1998, IOP PUBLISHING LTD, 159, 423-426, 1999, Peer-reviwed, Ne-like ions have been investigated with a flat crystal X-ray crystal spectrometer at the Tokyo electron beam ion trap facility. For several n = 3 to 2 transitions in Ne-like Ba and Cs, wavelengths have been determined with an accuracy of about 200 ppm. The experimental wavelengths are compared with previous theoretical and experimental results. For Ne-like Ha, transitions have been observed to obtain the collision strength for electron impact excitation at the electron energy of just above threshold.
Scientific journal, English - Atomic physics experiments using the Tokyo electron beam ion trap
S Ohtani; N Nakamura
JOURNAL OF THE KOREAN PHYSICAL SOCIETY, KOREAN PHYSICAL SOC, 32, 3, 353-355, Mar. 1998, Peer-reviwed, A new electron-beam ion trap (EBIT) has been constructed at the Institute for Laser Science, University of Electro-Communications. The general features of the Tokyo EBIT, as well as its design and operation, are given. During the first test phase, X-ray spectra from Ne-like Ba and W ions and also from bare and hydrogen-like Kr ions were observed. This paper also shows the propsed experimental program.
Scientific journal, English - The present status of the Tokyo electron beam ion trap
N. Nakamura; J. Asada; F. J. Currell; T. Fukami; T. Hirayama; D. Kato; K. Motohashi; E. Nojikawa; S. Ohtani; K. Okazaki; M. Sakurai; H. Shimizu; N. Tada; S. Tsurubuchi; H. Watanabe
Review of Scientific Instruments, AIP Publishing, 69, 2, 694-696, Feb. 1998, Peer-reviwed
Scientific journal - Recent research using the Oxford electron beam ion trap
HS Margolis; J Asada; TV Back; DJ Bieber; FJ Currell; EG Myers; N Nakamura; S Ohtani; PK Oxley; M Sakurai; JD Silver; H Watanabe
Hyperfine Interactions, BALTZER SCI PUBL BV, 115, 1-4, 139-142, 1998, Peer-reviwed, An overview is given of the current spectroscopic effort on the Oxford electron beam ion trap. Recent results from three different experiments are discussed: a precision measurement of the 1s2s S-3(1)-1s2p P-3(2) transition in helium-like neon by VUV emission spectroscopy, a measurement of the two-electron contribution to the ground state energy of helium-like argon using absorption edge spectroscopy, and a study of the lifetime of the 1s(2)2s2p P-3(2) level in beryllium-like argon.
Scientific journal, English - Characteristics of the Tokyo Electron-Beam Ion Trap
Hirofumi Watanabe; Junji Asada; Frederick John Currell; Tsunemitsu Fukami; Takato Hirayama; Kenji Motohashi; Nobuyuki Nakamura; Eimitsu Nojikawa; Shunsuke Ohtani; Kiyohiko Okazaki; Makoto Sakurai; Hiroshi Shimizu; Naoko Tada; Seiji Tsurubuchi
Journal of the Physical Society of Japan, Physical Society of Japan, 66, 12, 3795-3800, 15 Dec. 1997, Peer-reviwed
Scientific journal - Study of electron capture collisions of O6++He by visible spectroscopy
H Watanabe; FJ Currell; H Kano; N Kobayashi; N Nakamura; S Ohtani; K Okazaki; H Tanuma; UI Safronova
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, PHYSICAL SOC JAPAN, 66, 12, 3790-3794, Dec. 1997, Peer-reviwed, Single and double electron capture processes by O6+ from He at 90 keV have been investigated by observation of the emission spectrum in the wavelength region of 290-510 nm. In addition to transitions from excited states of O5+ populated by Single electron capture processes, Yrast transitions from Rydberg states (1s(2)2snl) of O4+ populated by double electron capture have been observed. Transfer target excitation processes have been confirmed by the observation of transitions from excited states of He+.
Scientific journal, English - Dependence of radiative stabilization on the projectile charge state after double-electron-transfer processes in slow, highly charged ion-molecule collisions
Franciszek Krok; Inga Yu. Tolstikhina; Hiroyuki A. Sakaue; Ichihiro Yamada; Kazumoto Hosaka; Masahiro Kimura; Nobuyuki Nakamura; Shunsuke Ohtani; Hiroyuki Tawara
Physical Review A, American Physical Society (APS), 56, 6, 4692-4699, 01 Dec. 1997, Peer-reviwed
Scientific journal - Multielectron transfer processes of highly charged ion I+ (6 ≤ q ≤ 30) atom collisions
Hiroyuki A Sakaue; Hiroyuki Tawara; Ichihiro Yamada; Kazumoto Hosaka; Frederick J Currel; Nobuyuki Nakamura; Shunsuke Ohtani; Hirofumi Watanabe; Atunori Danjo; Masahiro Kimura; Atsushi Matsumoto; Makoto Sakurai; Masuhiro Yoshino
Fusion Engineering and Design, Elsevier BV, 34-35, 785-788, Mar. 1997, Peer-reviwed
Scientific journal - A scaling law for charge transfer cross-sections
Kazumoto Hosaka; Frederick J Currel; Atsunori Danjo; Masahiro Kimura; Atsushi Matsumoto; Nobuyuki Nakamura; Shunsuke Ohtani; Hiroyuki A Sakaue; Makoto Sakurai; Hiroyuki Tawara; Hirofumi Watanabe; Ichihiro Yamada; Masuhiro Yoshino
Fusion Engineering and Design, Elsevier BV, 34-35, 781-783, Mar. 1997, Peer-reviwed
Scientific journal - X-ray spectroscopy at the Tokyo electron beam ion trap
J Asada; F J Currell; T Fukami; T Hirayama; K Motohashi; N Nakamura; E Nojikawa; S Ohtani; K Okazaki; M Sakurai; H Shiraishi; S Tsurubuchi; H Watanabe
Physica Scripta, IOP Publishing, T73, 90-92, 01 Jan. 1997, Peer-reviwed
Scientific journal - An overview of the Tokyo electron beam ion trap
N Nakamura; J Asada; F J Currell; T Fukami; T Hirayama; K Motohashi; T Nagata; E Nojikawa; S Ohtani; K Okazaki; M Sakurai; H Shiraishi; S Tsurubuchi; H Watanabe
Physica Scripta, IOP Publishing, T73, 362-364, 01 Jan. 1997, Peer-reviwed
Scientific journal - Control system of the Tokyo electron beam ion trap
H Watanabe; J Asada; F J Currell; T Fukami; T Hirayama; K Motohashi; N Nakamura; E Nojikawa; S Ohtani; K Okazaki; M Sakurai; H Shiraishi; S Tsurubuchi
Physica Scripta, IOP Publishing, T73, 365-367, 01 Jan. 1997, Peer-reviwed
Scientific journal - Extraction of trapped ions from the Tokyo electron beam ion trap
K Motohashi; J Asada; F J Currell; T Fukami; T Hirayama; K Mochiji; N Nakamura; E Nojikawa; K Okazaki; S Ohtani; M Sakurai; H Shiraishi; S Tsurubuchi; H Watanabe
Physica Scripta, IOP Publishing, T73, 368-370, 01 Jan. 1997, Peer-reviwed
Scientific journal - Detector systems for use with an electron beam ion trap
F J Currell; J Asada; T Fukami; H Hirayama; N Nakamura; K Motohashi; E Nojikawa; K Okazaki; S Ohtani; M Sakurai; H Shiraishi; S Tsurubuchi; H Watanabe
Physica Scripta, IOP Publishing, T73, 371-372, 01 Jan. 1997, Peer-reviwed
Scientific journal - Multiple electron capture processes between highly charged ions and molecules
Kazumoto Hosaka; Hiroyuki Tawara; Ichihiro Yamada; Hiroyuki A Sakaue; Franciszek Krok; Frederik J Currell; Nobuyuki Nakamura; Shunsuke Ohtani; Hirofumi Watanabe; Atsunori Danjo; Masahiro Kimura; Atsushi Matsumoto; Makoto Sakurai; Masuhiro Yoshino
Physica Scripta, IOP Publishing, T73, 273-275, 01 Jan. 1997, Peer-reviwed
Scientific journal - Double electron transfer in slow, highly charged ion-molecule collisions
F Krok; H Tawara; I Yu Tolstikhina; H A Sakaue; I Yamada; K Hosaka; M Kimura; A Matsumoto; N Nakamura; S Ohtani; M Sakurai; H Watanabe; M Yoshino
Physica Scripta, IOP Publishing, T73, 264-266, 01 Jan. 1997, Peer-reviwed
Scientific journal - Projectile charge dependence of multi-electron transfer processes in highly charged ion-atom collisions
H A Sakaue; H Tawara; I Yamada; K Hosaka; F Krok; F J Currell; N Nakamura; S Ohtani; H Watanabe; A Danjo; M Kimura; A Matsumoto; M Sakurai; M Yoshino
Physica Scripta, IOP Publishing, T73, 182-184, 01 Jan. 1997, Peer-reviwed
Scientific journal - A New Versatile Electron-Beam Ion Trap
Frederick John Currell; Junji Asada; Koichi Ishii; Arimichi Minoh; Kenji Motohashi; Nobuyuki Nakamura; Kazou Nishizawa; Shunsuke Ohtani; Kiyohiko Okazaki; Makoto Sakurai; Hiroshi Shiraishi; Seiji Tsurubuchi; Hirofumi Watanabe
Journal of the Physical Society of Japan, Physical Society of Japan, 65, 10, 3186-3192, 15 Oct. 1996, Peer-reviwed
Scientific journal - Electron spectra from doublet and quartet states of N4+(1s3l3l') produced by 60 keV N6++H-2, O-2 collisions
N Nakamura; Y Awaya; F J Currell; T Kambara; Y Kanai; S Kitazawa; M Koide; S Ohtani; U I Safronova; H Suzuki; T Takayanagi; K Wakiya
Journal of Physics B: Atomic, Molecular and Optical Physics, IOP Publishing, 29, 10, 1995-2006, 28 May 1996, Peer-reviwed
Scientific journal - Electron spectra from singlet and triplet states of O4+(1s23l3l', 1s23l4l') produced by 60 and 120 keV O6++He, Ne, Ar collisions
N Nakamura; H Ida; Y Matsui; K Wakiya; T Takayanagi; M Koide; F J Currell; S Kitazawa; H Suzuki; S Ohtani; U I Safronova; M Sekiguchi
Journal of Physics B: Atomic, Molecular and Optical Physics, IOP Publishing, 28, 22, 4743-4758, 28 Nov. 1995, Peer-reviwed
Scientific journal - A scaling law of cross sections for multiple electron transfer in slow collisions between highly charged ions and atoms
M Kimura; N Nakamura; H Watanabe; I Yamada; A Danjo; K Hosaka; A Matsumoto; S Ohtani; H A Sakaue; M Sakurai; H Tawara; M Yoshino
Journal of Physics B: Atomic, Molecular and Optical Physics, IOP Publishing, 28, 20, L643-L647, 28 Oct. 1995, Peer-reviwed
Scientific journal - Target dependence of multi-electron processes in Iq+(q=10, 15)+rare gas (Ne, Ar, Kr and Xe) collisions
N Nakamura; F J Currell; A Danjo; M Kimura; A Matsumoto; S Ohtani; H A Sakaue; M Sakurai; H Tawara; H Watanabe; I Yamada; M Yoshino
Journal of Physics B: Atomic, Molecular and Optical Physics, IOP Publishing, 28, 14, 2959-2972, 28 Jul. 1995, Peer-reviwed
Scientific journal - Ejected electron spectra from triplet states of doubly-excited O4+ and Ne6+
Yasuyuki Kanai; Tadashi Kambara; Yohko Awaya; Hayato Ida; Yasuyuki Matsui; Toshinobu Takayanagi; Kazuyoshi Wakiya; Nobuyuki Nakamura; Michi Koide; Sin-iti Kitazawa; Syunsuke Ohtani
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Elsevier BV, 98, 1-4, 81-84, May 1995, Peer-reviwed
Scientific journal - Absolute cross sections for the multielectron processes in 15 keV I10+ + rare gas collisions
Nobuyuki Nakamura; Frederick J. Currell; Atsunori Danjo; Masahiro Kimura; Atsushi Matsumoto; Shunsuke Ohtani; Hiroyuki A. Sakaue; Makoto Sakurai; Hiroyuki Tawara; Hirofumi Watanabe; Ichihiro Yamada; Masuhiro Yoshino
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Elsevier BV, 98, 1-4, 284-287, May 1995, Peer-reviwed
Scientific journal - Decay of multiply excited Rydberg ions produced in I10+-rare-gas collisions
I Yamada; F J Currell; A Danjo; M Kimura; A Matsumoto; N Nakamura; S Ohtani; H A Sakaue; M Sakurai; H Tawara; H Watanabe; M Yoshino
Journal of Physics B: Atomic, Molecular and Optical Physics, IOP Publishing, 28, 1, L9-L13, 14 Jan. 1995, Peer-reviwed
Scientific journal - Ejected-electron spectra from the triplet states of O4+(1s23l3l') produced by O6++O2collisions
N Nakamura; T Nabeshima; F J Currell; Y Kanai; S Kitazawa; M Koide; H A Sakaue; H Ida; Y Matsui; K Wakiya; T Takayanagi; T Kambara; Y Awaya; H Suzuki; S Ohtani; U I Safronova
Journal of Physics B: Atomic, Molecular and Optical Physics, IOP Publishing, 27, 24, L785-L793, 28 Dec. 1994, Peer-reviwed
Scientific journal - Doubly-excited states of He-like and Be-like ions in highly-charged ions
Yasuyuki Kanai; Hiroyuki A. Sakaue; Tadashi Kambara; Yohko Awaya; Nobuyuki Nakamura; Sin-iti Kitazawa; Michi Nagata; Shunsuke Ohtani; Hirosi Suzuki; Takayuki Nabeshima; Tomoo Negishi; Toshinobu Takayanagi; Kazuyoshi Wakiya
AIP Conference Proceedings, AIP, 1993, Peer-reviwed
International conference proceedings - Coincidence measurement of electron capture processes between highly charged Iq+ ions and Xe atoms
Makota Sakurai; Hiroyuki Tawara; Ichihiro Yamada; Masahiro Kimura; Nobuyuki Nakamura; Shunsuke Ohtani; Atsunori Danjo; Masuhiro Yoshino; Atsushi Matsumoto
AIP Conference Proceedings, AIP, 1993, Peer-reviwed
International conference proceedings - Ejected electron spectra from doubly-excited states (2lnl') of He-like ions produced by the B5+, C6+-He collisions
H A Sakaue; Y Awaya; A Danjo; T Kambara; Y Kanai; T Nabeshima; N Nakamura; S Ohtani; H Suzuki; T Takayanagi; K Wakiya; I Yamada; M Yoshino
Journal of Physics B: Atomic, Molecular and Optical Physics, IOP Publishing, 24, 17, 3787-3795, 14 Sep. 1991, Peer-reviwed
Scientific journal - Electron spectroscopy of doubly-excited helium-like ions
Y. Kanai; H. A. Sakaue; S. Ohtani; K. Wakiya; H. Suzuki; T. Takayanagi; T. Kambara; A. Danjo; M. Yoshino; Y. Awaya
Zeitschrift fur Physik D Atoms, Molecules and Clusters, Springer Science and Business Media LLC, 21, S1, S225-S226, Mar. 1991, Peer-reviwed
Scientific journal
MISC
- 多価イオンの再結合硬 X 線の偏光度測定
中村信行
Lead, Jul. 2023, 原子衝突学会誌しょうとつ, 20, 4, 74-87, Japanese, Peer-reviwed, Invited, Introduction scientific journal - 29pCH-9 Polarization Resolved High Resolution Spectroscopy of Forbidden Visible Lines of Tungsten in LHD Plasma
Fujii K.; Kato D.; Nakamura N.; Sakaue H.; Nakai Y.; Shinohara M.; Takahashi Y.; Goto M.; Morita S.; Hasuo M.
The Physical Society of Japan (JPS), 05 Mar. 2014, Meeting abstracts of the Physical Society of Japan, 69, 1, 210-210, Japanese, 1342-8349, 110009834299, AA11439205 - 28pED-4 Development of a Kingdon ion trap for the purpose of laboratory observation of the X-ray forbidden transitions caused by solar wind
Numadate N.; Okada K.; Nakamura N.; Tanuma H.
The Physical Society of Japan (JPS), 26 Mar. 2013, Meeting abstracts of the Physical Society of Japan, 68, 1, 230-230, Japanese, 1342-8349, 110009643242, AA11439205 - 28pED-5 Development of an extreme ultraviolet spectrometer for charge exchange spectroscopy
Aida Y.; Ohashi H.; Okada K.; Tanuma H.; Nakamura N.
The Physical Society of Japan (JPS), 26 Mar. 2013, Meeting abstracts of the Physical Society of Japan, 68, 1, 230-230, Japanese, 1342-8349, 110009643243, AA11439205 - 26aEF-11 Observation of M1 transitions of highly charged tungsten ions at the LHD and evaluation of ionization/recombination rate coefficients
Kato Daiji; Sakaue Hiroyuki A.; Goto Motoshi; Morita Shigeru; Murakami Izumi; Suzuki Chihiro; Tamura Naoki; Sudo Shigeru; Nakamura Nobuyuki; Watanabe Hirofumi; Koike Fumihiro; Ding Xiaobin; Sasaki Akira
The Physical Society of Japan (JPS), 26 Mar. 2013, Meeting abstracts of the Physical Society of Japan, 68, 1, 263-263, Japanese, 1342-8349, 110009643374, AA11439205 - 23pRA-5 Line spectra analysis of iron ions in solar/laboratory plasma and atomic data
Yamamoto N.; Kato T.; Sato K.; Funaba H.; Tamura N.; Suzuki C.; Kato D.; Sakaue H.; Nakamura N.; Beiersdofer P.; Lepson J. K.; Nishimura H.; Watanabe T.
The Physical Society of Japan (JPS), 29 Feb. 2008, Meeting abstracts of the Physical Society of Japan, 63, 1, 153-153, Japanese, 1342-8349, 110007196877, AA11439205 - Fundamental Atomic Processes and Increasing Applications of Highly Charged Ions
中村信行
高温フ?ラス?マ中の多価イオンスヘ?クトルの観測は禁制遷移の同定を含め,多価イオンのエネルキ?ー構造を明 らかにする上て?原子物理学に大きな貢献を果たしてきている.ここて?はフ?ラス?マ診断への応用として,多価イオ ンの発するスヘ?クトルのうちて?,禁制線と荷電交換反応による可視,紫外の長波長スヘ?クトル線を利用した高分 解能分光によるフ?ラス?マ診断について述へ?る., プラズマ・核融合学会, Aug. 2007, プラズマ・核融合学会誌, 83, 8, 658, Japanese, Peer-reviwed, Introduction other, 120005962042 - 多価イオン生成の方法
坂上裕之; 中村信行
Aug. 2007, プラズマ・核融合学会誌, 83, 8, 671, Japanese, Peer-reviwed, Introduction other - ナノプロセス用電子ビーム多価イオン源の開発
櫻井誠; 中嶌史晴; 福本卓典; 中村信行; 大谷俊介; 益子信郎
2005, J. Vac. Soc. Jpn., 48, 317-320, Japanese, Peer-reviwed, Introduction other - Analysis of resonance transitions in X-ray spectra of electron interaction with highly charged iron ions
Yue-Ming LI; Daiji KATO; Xiao-Min TONG; Hirofumi WATANABE; Tsutomu WATANABE; Braian O'ROURKE; Hideharu KURAMOTO; Nobuyuki NAKAMURA; Frederick J. CURRELL; Chikashi YAMADA; Shunsuke OHTANI
2003, J.Plasma and Fusion Res., 79, 1, 52-60, 0918-7928 - Studies of Highly Charged Ions Using an Electron Beam Ion Trap
Nobuyuki Nakamura; Hiroshi Shimizu; Shunsuke Ohtani
2001, J. Mass Spectrom. Soc. Jpn, 49, 229, Japanese, Peer-reviwed, Introduction other - Electron-ion interactions and spectroscopy of highly charged ions studied using the Tokyo EBIT
EJ Currell; D Kato; N Nakamura; S Ohtani; EJ Sokell; H Watanabe; C Yamada
We have been using the Tokyo EBIT to study a wide range of electron ion interactions and to measure the energies of transitions in highly charged ions. Transition energies were investigated using visible and X-ray spectroscopy. The two electron contribution to the ground state energy of Helium-like Krypton was measured using absorption-edge spectroscopy. Dielectronic recombination processes were measured by mapping the yield of X-rays as a function of electron energy whilst the time dependence of the evolution of charge states was measured, towards the determination of ionization cross-sections. A brief review of these activities is given., ROYAL SWEDISH ACAD SCIENCES, 1999, PHYSICA SCRIPTA, T80A, 154-157, English, 0281-1847, WOS:000082093000032 - 電子ビームイオントラップ（EBIT）の開発と多価イオンの研究
中村信行; 大谷俊介
The Physical Society of Japan (JPS), 1997, 日本物理学会誌, 52, 12, 919-923, Japanese, Peer-reviwed, Introduction other, 0029-0181, 110002069045, AN00196952 - ELECTRON-SPECTROSCOPY OF DOUBLY-EXCITED HELIUM-LIKE IONS
S OHTANI; Y KANAI; YAMADA, I; HA SAKAUE; Y AWAYA; T KAMBARA; T NABESHIMA; N NAKAMURA; H SUZUKI; T TAKAYANAGI; K WAKIYA; A DANJO; M YOSHINO
Spectroscopic investigations of electrons coming from doubly-excited states of helium-like C and B ions have been made with zero-degree spectroscopies. These excited states are produced by two-electron capture collisions of bare ions with helium atoms. Electrons from the configurations of 2/nl' are observed in a wide energy range. Total angular momentum distributions in the double-electron transfer collisions are briefly discussed., ELSEVIER SCIENCE BV, Apr. 1991, NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, 53, 4, 383-386, English, 0168-583X, WOS:A1991FP55200006
Books and other publications
Lectures, oral presentations, etc.
- Be様多価イオンAr14+の時間分解レーザー分光
木村直樹A; 宮由輝B; 伊藤大貴B; PritiC; 加藤太治C; D; 馬場正昭E; 久間晋A; 東俊行A; 中村信行B
Oral presentation, Japanese, 日本物理学会2024年秋季大会
19 Mar. 2024
18 Mar. 2024- 21 Mar. 2024 - 5sおよび4f準安定状態が引き起こす特異なプラズマイオン化平衡
木村直樹; Priti; 沼舘直樹; 児玉龍之介; 中村信行
Oral presentation, Japanese, 日本物理学会2024年秋季大会
19 Mar. 2024
18 Mar. 2024- 21 Mar. 2024 - Transition Probability Measurement of Lanthanide Elements Using Laser Induced Breakdown Spectroscopy (LIBS)
Supriya Kodangil; Masaomi Tanaka; Nanae Domoto; Daiji Kato; Hajime Tanuma; Nobuyuki Nakamura
Oral presentation, English, 2023年合同素過程研究会
22 Dec. 2023
20 Dec. 2023- 22 Dec. 2023 - 多価イオン照射グラファイトからのバルマー線発光観測
岡田凌; 中村信行; 櫻井誠
Poster presentation, Japanese, 原子衝突学会第48回年会
25 Nov. 2023
25 Nov. 2023- 26 Nov. 2023 - 真空紫外域におけるタングステン多価イオン発光線の探索
伊藤 大貴; 稲留 康太; 木村 直樹; Priti; 中村 信行
Poster presentation, Japanese, 原子衝突学会第48回年会
25 Nov. 2023
25 Nov. 2023- 26 Nov. 2023 - Be様多価イオンAr14+のプラズマアシストレーザー分光
宮由輝; 木村直樹; 伊藤大貴; Priti; 馬場正昭; 久間晋; 東俊行; 中村信行
Poster presentation, Japanese, 原子衝突学会第48回年会
25 Nov. 2023
25 Nov. 2023- 26 Nov. 2023 - HYPERFINE INTERACTIONS OF HIGHLY CHARGED IONS STUDIED WITH MAGNETIC-FIELD-FREE ION STORAGE DEVICES
Naoki Kimura; Priti; Nobuyuki Nakamura; Sakumi Harayama; Kiattichart Chartkunchand; Susumu Kuma; Yuji Nakano; Toshiyuki Azuma
Invited oral presentation, English, International Conference on Hyperfine Interactions and their Applications (HYPERFINE2023), Invited
14 Nov. 2023
13 Nov. 2023- 17 Nov. 2023 - Spectroscopy of highly charged ions with two complementary electron beam ion traps in Tokyo
Nobuyuki Nakamura
Invited oral presentation, English, 7th Asia-Pacific Conference on Plasma Physics (AAPPS-DPP2023), Invited
13 Nov. 2023
12 Nov. 2023- 17 Nov. 2023 - Continuous injection of metallic elements into an electron-beam ion trap using an electron-beam evaporator
Naoki Kimura; Genichi Kiyama; Daiki Ito; Nobuyuki Nakamura
Poster presentation, XXXIII International Conference on Photonic, Electronic and Atomic Collisions
28 Jul. 2023
25 Jul. 2023- 01 Aug. 2023 - Plasma-assisted laser spectroscopy of highly charged ions: Application of the study on collisional processes in a laboratory plasma
N Kimura; Priti; S Kuma; T Azuma; N Nakamura
Oral presentation, 28th International Symposium on Ion-Atom Collisions (ISIAC 2023)
23 Jul. 2023
21 Jul. 2023- 24 Jul. 2023 - TRANSITION PROBABILITY MEASUREMENTS FOR LANTHANIDE ELEMENTS USING LASER-INDUCED BREAKDOWN SPECTROSCOPY
Kodangil Supriya; Masayuki Iwata; Daiji Kato; Masaomi Tanaka; Hajime Tanuma; Nobuyuki Nakamura
Poster presentation, English, THE 14TH INTERNATIONAL COLLOQUIUM ON ATOMIC SPECTRA AND OSCILLATOR STRENGTHS FOR ASTROPHYSICAL AND LABORATORY PLASMAS (ASOS14)
10 Jul. 2023
10 Jul. 2023- 14 Jul. 2023 - Exploring hyperfine structures of many-electron ions using laser spectroscopy
Naoki Kimura; Priti; Keigo Soutome; Naoki Numadate; Nobuyuki Nakamura; Pipatpakorn Pativate; Susumu Kuma; Toshiyuki Azuma; Yasutaka Kono
Oral presentation, The 21st meeting on Atomic Processes in Plasmas
17 May 2023
15 May 2023- 19 May 2023 - 電子ビームイオントラップを用いた多価イオンの真空紫外分光
中村信行
核融合科学研究所素過程研究会, Invited
23 Dec. 2022
21 Dec. 2022- 23 Dec. 2022 - 二電子性再結合X線の偏光度測定:J=1/2-1/2遷移に大きな偏光度を生じたメカニズムについて
中村信行
核融合科学研究所素過程研究会
22 Dec. 2022
21 Dec. 2022- 23 Dec. 2022 - 多価イオンの物理と実験手法
中村信行
核融合科学研究所素過程研究会, Invited
21 Dec. 2022
21 Dec. 2022- 23 Dec. 2022 - Plasma atomic processes studied with two complementary electron beam ion traps in Tokyo
Nobuyuki NAKAMURA
Invited oral presentation, English, The 31st International Toki Conference on Plasma and Fusion Research (ITC31), Invited, International conference
09 Nov. 2022
08 Nov. 2022- 11 Nov. 2022 - Polarization measurements for recombination X-rays
NAKAMURA Nobuyuki
Invited oral presentation, English, Workshop on Physics with Trapped Charged Particles (WPTCP 2022), Invited, International conference
27 Oct. 2022
27 Oct. 2022- 28 Oct. 2022 - 多電子多価イオン超微細相互作用の実験研究どう観るか？なぜ観るか？
木村直樹; Priti,久間晋; 中村信行; 東俊行
Invited oral presentation, Japanese, 原子衝突学会第47回年会, Domestic conference
08 Sep. 2022
08 Sep. 2022- 09 Sep. 2022 - 電子ビームイオン源による多価イオン-固体表面衝突実験
岡田凌; 早乙女京吾; 中村信行; 櫻井誠
Poster presentation, Japanese, 原子衝突学会第47回年会, Domestic conference
08 Sep. 2022
08 Sep. 2022- 09 Sep. 2022 - 電子衝撃加熱蒸着源による電子ビームイオントラップへの金属試料導入
木山 源一; 木村 直樹; 伊藤 大貴; 池田 大和; 緒方海都; 東俊行; 中村信行
Poster presentation, Japanese, 原子衝突学会第47回年会, Domestic conference
08 Sep. 2022
08 Sep. 2022- 09 Sep. 2022 - レーザー誘起ブレークダウン分光によるランタンイオンの遷移確率の測定
岩田昌幸; 田中雅臣; 加藤太治; 田沼肇; 中村信行
Poster presentation, Japanese, 原子衝突学会第47回年会, Domestic conference
08 Sep. 2022
08 Sep. 2022- 09 Sep. 2022 - 高速中性水素原子ビーム源の開発
浅野裕哉; 中村信行; 坂上裕之; 飯田進平; 田沼肇
Poster presentation, Japanese, 原子衝突学会第47回年会, Domestic conference
08 Sep. 2022
08 Sep. 2022- 09 Sep. 2022 - 5p-5s spectrum in highly charged WXII - WXIV Ions
Priti; Momoe Mita; Daiji Kato; Izumi Murakami; Hiroyuki A. Sakaue; Nobuyuki Nakamura
Invited oral presentation, English, 20th International Conference on the Physics of Highly Charged Ions (HCI2022), International conference
01 Sep. 2022
29 Aug. 2022- 03 Sep. 2022 - Collisional-radiative model for the spectra of M1 transition of W53+ ion
Y. L. Xu; X. B. Ding; Y. Yang; K. Yao; L. Zhang; F. Koike; D. Kato; I. Murakami; H. A. Sakaue; N. Nakamura; C. Z. Dong
Invited oral presentation, English, 20th International Conference on the Physics of Highly Charged Ions (HCI2022), International conference
01 Sep. 2022
29 Aug. 2022- 03 Sep. 2022 - Identification of magnetic-dipole lines from W25+ ions in the 4f3 ground state
Daiji Kato; Toshiki Umezaki; Hiroyuki A. Sakaue; Nobuyuki Nakamura; Tomoko Kawate; Izumi Murakami
Poster presentation, English, 20th International Conference on the Physics of Highly Charged Ions (HCI2022), International conference
31 Aug. 2022
29 Aug. 2022- 03 Sep. 2022 - Charge exchange spectroscopy of multiply charged erbium ions
Yuki Nishimura; Saki Imaizumi; Hajime Tanuma; Nobuyuki Nakamura; Yuichiro Sekiguchi; Shinya Wanajo; H.A. Sakaue; Daiji Kato; Izumi Murakami; Masaomi Tanaka; Gediminas Gaigalas
Poster presentation, English, 20th International Conference on the Physics of Highly Charged Ions (HCI2022), International conference
31 Aug. 2022
29 Aug. 2022- 03 Sep. 2022 - Detailed analysis of spectra from Ga-like ions of heavy elements observed in high temperature plasmas
Chihiro Suzuki; Fumihiro Koike; Izumi Murakami; Daiji Kato; Naoki Tamura; Tetsutarou Oishi; Nobuyuki Nakamura
Poster presentation, English, 20th International Conference on the Physics of Highly Charged Ions (HCI2022), International conference
31 Aug. 2022
29 Aug. 2022- 03 Sep. 2022 - A collisional-radiative model for water window EUV spectra of bismuth ions
Dingbao Song; Daiji Kato; Hayato Ohashi; Hiroyuki A. Sakaue; Nobuyuki Nakamura
Poster presentation, English, 20th International Conference on the Physics of Highly Charged Ions (HCI2022), International conference
31 Aug. 2022
29 Aug. 2022- 03 Sep. 2022 - Soft x-ray emission spectroscopy of bismuth ions with an electron beam ion trap
Hayato Ohashi; Ryota Iwami; Dingbao Song; Daiji Kato; Hiroyuki A. Sakaue; Izumi Murakami; Nobuyuki Nakamura
Poster presentation, English, 20th International Conference on the Physics of Highly Charged Ions (HCI2022), International conference
31 Aug. 2022
29 Aug. 2022- 03 Sep. 2022 - Atomic Number Dependence of Electric Octupole Decay in Electron Beam Ion Trap
Hiroyuki. A. Sakaue; Daiji Kato; Izumi Murakami; Hayato Ohashi; Nobuyuki Nakamura
Poster presentation, English, 20th International Conference on the Physics of Highly Charged Ions (HCI2022), International conference
31 Aug. 2022
29 Aug. 2022- 03 Sep. 2022 - Hyperfine splitting of the clock candidate transition in 93Nb10+
Naoki Kimura; Genichi Kiyama; Priti; Michiharu Wada; Toshiyuki Azuma; Nobuyuki Nakamura
Poster presentation, English, 20th International Conference on the Physics of Highly Charged Ions (HCI2022), International conference
31 Aug. 2022
29 Aug. 2022- 03 Sep. 2022 - Detailed analysis of atomic processes relevant to the line intensity ratio of FeXV(233.9Å/243.8Å) in a compact electron beam ion trap
Norimasa Yamamoto; Hiroyuki A. Sakaue; Daiji Kato; Nobuyuki Nakamura
Poster presentation, English, 20th International Conference on the Physics of Highly Charged Ions (HCI2022), International conference
31 Aug. 2022
29 Aug. 2022- 03 Sep. 2022 - Observation of extreme ultraviolet to visible spectra of tungsten ions with a compact electron ion beam trap
Kota Inadome; Mayuko Funabashi; Priti; Daiji Kato; Hiroyuki A. Sakaue; Izumi Murakami; Nobuyuki Nakamura
Poster presentation, English, 20th International Conference on the Physics of Highly Charged Ions (HCI2022), International conference
31 Aug. 2022
29 Aug. 2022- 03 Sep. 2022 - HCI-surface collision experiments with an electron beam ion source
Keigo Soutome; Ryo Okada; Naofumi Nishida; Makoto Sakurai; Nobuyuki Nakamura
Poster presentation, English, 20th International Conference on the Physics of Highly Charged Ions (HCI2022), International conference
31 Aug. 2022
29 Aug. 2022- 03 Sep. 2022 - Observation of vacuum ultraviolet transitions relevant to astrophysical plasmas with a compact electron beam ion trap
Masayoshi Hosoya; Daiji Kato; Nobuyuki Nakamura
Poster presentation, English, 20th International Conference on the Physics of Highly Charged Ions (HCI2022), International conference
31 Aug. 2022
29 Aug. 2022- 03 Sep. 2022 - Observation of extreme ultraviolet spectra relevant to the electron density diagnostics of solar corona active regions
Yasutaka Kono; Norimasa Yamamoto; Daiji Kato; Hiroyuki A. Sakaue; Izumi Murakami; Hirohisa Hara; Nobuyuki Nakamura
Poster presentation, English, 20th International Conference on the Physics of Highly Charged Ions (HCI2022), International conference
31 Aug. 2022
29 Aug. 2022- 03 Sep. 2022 - Relativistic effects on radiative properties and electronic collisions of highly charged heavy ions
Zhimin Hu; Xiang Gao; Ke Yao; Chensheng Wu; Naoki Numadate; Yulong Ma; Yong Wu; Baoren Wei; Yaming Zou; Nobuyuki Nakamura
Invited oral presentation, English, 20th International Conference on the Physics of Highly Charged Ions (HCI2022), Invited, International conference
29 Aug. 2022
29 Aug. 2022- 03 Sep. 2022 - Lifetime measurement of the microsecond-order electric-quadrupole transition: Application of plasma-assisted laser spectroscopy
Naoki Kimura; Priti; Susumu Kuma; Toshiyuki Azuma; Nobuyuki Nakamura
Invited oral presentation, English, 20th International Conference on the Physics of Highly Charged Ions (HCI2022)
29 Aug. 2022
29 Aug. 2022- 03 Sep. 2022 - Atomic physics of highly charged heavy ions studied at the Tokyo electron beam ion trap
Nobuyuki NAKAMURA
Invited oral presentation, English, 15th Asia Pacific Physics Conference (APPC15), Invited, International conference
23 Aug. 2022
21 Aug. 2022- 26 Aug. 2022 - 二電子性再結合X線の偏光度測定III
中村信行; 大石晋平; 沼館直樹; 内田悠介; 小高裕和; Xiang Gao; 加藤太治; 高橋忠幸; 都築豊; Xiaomin Tong; 米田浩基; 渡辺伸; 渡邉裕文
Oral presentation, Japanese, 日本物理学会第77回年次大会, Domestic conference
17 Mar. 2022
15 Mar. 2022- 19 Mar. 2022 - 核融合プラズマ診断への応用に向けたタングステン多価イオンの近紫外域禁制遷移の同定
梅﨑智暉; 加藤太治; 坂上裕之; 中村信行; 川手朋子; 村上泉
Oral presentation, Japanese, 日本物理学会第77回年次大会, Domestic conference
16 Mar. 2022
15 Mar. 2022- 19 Mar. 2022 - FeXV（233 Å/243 Å）線強度比の密度依存性
山本則正; 加藤太治; 坂上裕之; 中村信行
Oral presentation, Japanese, 日本物理学会第77回年次大会, Domestic conference
16 Mar. 2022
15 Mar. 2022- 19 Mar. 2022 - EBITによるタングステン極端紫外域UTAスペクトルの観測
中村信行
Oral presentation, Japanese, 核融合科学研究所2021年合同素過程研究会, Domestic conference
24 Dec. 2021
22 Dec. 2021- 24 Dec. 2021 - Sn様・In様イオンの可視領域発光線の観測
Pativate Pipatpakorn; 中村信行
Oral presentation, Japanese, 核融合科学研究所2021年合同素過程研究会, Domestic conference
22 Dec. 2021
22 Dec. 2021- 24 Dec. 2021 - Hyperfine-structures in a highly charged 127I7+ ion observed by laser spectroscopy
Priti, N Kimura; Y Kono; P Pipatpakorn; K Soutome; R Kodama; N Numadate; S Kuma; T Azuma; N Nakamura
Oral presentation, English, 核融合科学研究所2021年合同素過程研究会, Domestic conference
22 Dec. 2021
22 Dec. 2021- 24 Dec. 2021 - 多価イオン照射実験用電子ビームイオン源による実験計画
早乙女京吾; 岡田凌; 櫻井誠; 中村信行
Poster presentation, Japanese, 原子衝突学会第46回年会
27 Oct. 2021
26 Oct. 2021- 28 Oct. 2021 - 多価イオンの極端紫外域発光線の強度比測定
細谷征由; 河野泰隆; 坂上裕之; 加藤太治; 村上泉; 原弘久; 中村信行
Poster presentation, Japanese, 原子衝突学会第46回年会, Domestic conference
27 Oct. 2021
26 Oct. 2021- 28 Oct. 2021 - ホルミウム多価イオンの可視域発光線の観測
木山源一; 木村直樹; Priti; 和田道治; 中村信行
Poster presentation, Japanese, 原子衝突学会第46回年会, Domestic conference
27 Oct. 2021
26 Oct. 2021- 28 Oct. 2021 - 電子ビームイオントラップによる4fn(n=3-4)イオンの可視領域
Pativate Pipatpakorn; 中村信行
Poster presentation, Japanese, 原子衝突学会第46回年会, Domestic conference
27 Oct. 2021
26 Oct. 2021- 28 Oct. 2021 - タングステンの真空紫外領域発光線の観測
稲留康太; 舩橋茉由子; 坂上裕之; 加藤太治; 村上泉; 中村信行
Poster presentation, Japanese, 原子衝突学会第46回年会, Domestic conference
27 Oct. 2021
26 Oct. 2021- 28 Oct. 2021 - レーザー誘起ブレークダウン分光によるエルビウムイオンの遷移確率の測定
岩田昌幸; 緒方海都; 田中雅臣; 和南城伸也; 関口雄一郎; Gedimanas Gaigalas; 坂上裕之; 加藤太治; 村上泉; 田沼肇; 中村信行
Poster presentation, Japanese, 原子衝突学会第46回年会, Domestic conference
27 Oct. 2021
26 Oct. 2021- 28 Oct. 2021 - 太陽フレアの密度診断に有用なEUV発光線強度比の測定
河野泰隆; 細谷征由; 沼館直樹; 坂上裕之; 加藤太治; 村上泉; 原弘久; 中村信行
Poster presentation, Japanese, 原子衝突学会第46回年会, Domestic conference
27 Oct. 2021
26 Oct. 2021- 28 Oct. 2021 - 多価イオン禁制遷移に対するプラズマアシストレーザー分光法の実証および超微細構造分裂の観測
木村直樹; Priti; 河野泰隆; Pativate Pipatpakorn; 早乙女京吾; 沼舘直樹; 久間晋; 東俊行; 中村信行
Invited oral presentation, Japanese, 原子衝突学会第46回年会, Domestic conference
26 Oct. 2021
26 Oct. 2021- 28 Oct. 2021 - タングステン多価イオンの近紫外域禁制遷移の同定
梅﨑智暉; 加藤太治; 坂上裕之; 中村信行; 川手朋子; 村上泉
Invited oral presentation, Japanese, 原子衝突学会第46回年会, Domestic conference
26 Oct. 2021
26 Oct. 2021- 28 Oct. 2021 - Laboratory experiments with an electron beam ion trap
NAKAMURA Nobuyuki
Oral presentation, Japanese, r-EMU Workshop 2021, Domestic conference
18 Oct. 2021
18 Oct. 2021- 19 Oct. 2021 - 電子ビームイオントラップによるSn様・In様イオンの可視領域発光線の観測
Pativate Pipatpakorn; 中村信行
Oral presentation, Japanese, 日本物理学会2021年秋季大会
22 Sep. 2021
20 Sep. 2021- 23 Sep. 2021 - Ar XIVにおけるEUV発光線強度比の電子密度依存性
河野泰隆; 沼館直樹; 大野望海; 坂上裕之; 加藤太治; 村上泉; 原弘久; 中村信行
Oral presentation, Japanese, 日本物理学会2021年秋季大会
22 Sep. 2021
20 Sep. 2021- 23 Sep. 2021 - EBITを用いた銀様多価イオンからの電気八重極子遷移の観測 II
坂上裕之; 加藤太治; 村上泉; 大橋隼人; 中村信行
Oral presentation, Japanese, 日本物理学会2021年秋季大会
22 Sep. 2021
20 Sep. 2021- 23 Sep. 2021 - 中性子星合体による重元素合成の基礎研究としての多価イオン電荷交換分光III
西村勇輝; 今泉咲希; 田沼肇; 中村信行; 関口雄一郎; 和南城伸也; 坂上裕之; 加藤太治; 村上泉; 田中雅臣; Gediminas Gaigalas
Oral presentation, Japanese, 日本物理学会2021年秋季大会
22 Sep. 2021
20 Sep. 2021- 23 Sep. 2021 - Pd様多価イオンI7+の禁制遷移レーザー分光
木村直樹; Priti; 河野泰隆; Pipatopakorn Pativate; 早乙女京吾; 児玉龍之介; 沼舘直樹; 久間晋; 東俊行; 中村信行
Oral presentation, Japanese, 日本物理学会2021年秋季大会
22 Sep. 2021
20 Sep. 2021- 23 Sep. 2021 - Hyperfine Induced Lifetime of Metastable State in Pd-like Ions
Priti; Naoki Kimura; Nobuyuki Nakamura
Oral presentation, English, 日本物理学会2021年秋季大会
22 Sep. 2021
20 Sep. 2021- 23 Sep. 2021 - Polarization of recombination X-rays studied with a state-of-the-art polarimeter installed at the Tokyo-EBIT
Nobuyuki Nakamura; Naoki Numadate; Shimpei Oishi; Daiji Kato; Hirokazu Odaka; Priti; Makoto Sakurai; Tadayuki Takahashi; Xiao-Min Tong; Yutaka Tsuzuki; Yuusuke Uchida; Hirofumi Watanabe; Shin Watanabe; Hiroki Yoneda
Oral presentation, English, 18th SPARC workshop, International conference
09 Sep. 2021
06 Sep. 2021- 09 Sep. 2021 - 核融合プラズマ研究への利用に向けたタングステン多価イオンの紫外可視磁気双極子線の同定
惠良彰太; 梅﨑智暉; 坂上裕之; 村上泉; 中村信行; 加藤太治
Oral presentation, Japanese, 日本物理学会第76回年次大会, Domestic conference
12 Mar. 2021
12 Mar. 2021- 15 Mar. 2021 - Breit interaction effects on recombination processes of highly charged ions
Nobuyuki Nakamura
Invited oral presentation, English, AAMOS20: Advances in Atomic, Molecular, and Optical Sciences 2020, Invited, International conference
17 Dec. 2020 - 電子ビームイオントラップによる多価イオンEUVスペクトル強度比の電子密度依存性
河野泰隆; 沼館直樹; 大野望海; 坂上裕之; 加藤太治; 村上泉; 原弘久; 中村信行
Oral presentation, Japanese, 2020年合同素過程研究会, Domestic conference
17 Dec. 2020 - 二電子性再結合X線の偏光度測定
中村信行
Oral presentation, Japanese, 2020年合同素過程研究会, Domestic conference
17 Dec. 2020 - EUV Transitions in Highly Charged W6+ -W13+ Ions Observed with an Electron Beam Ion Trap
Priti,Daiji Kato; Izumi Murakami; Hiroyuki A. Sakaue; Nobuyuki Nakamura
Poster presentation, English, 原子衝突学会第45回年会, Domestic conference
08 Dec. 2020 - Sn様及びIn様多価イオンにおける可視領域発光線の観測
Pipatpakorn Pativate; 中村信行
Poster presentation, Japanese, 原子衝突学会第45回年会, Domestic conference
08 Dec. 2020 - 強制非平衡イオン発光計測による多価イオンの電子衝突電離断面積の 実験的評価
佐々木 康; 物部 将士; 中村 信行; 坂上 裕之; 村上 泉; 加藤 太治
Poster presentation, Japanese, 原子衝突学会第45回年会, Domestic conference
08 Dec. 2020 - 長寿命準安定準位がプラズマ中の電離平衡に与える特異性
木村 直樹; Priti; 児玉 龍之介; 沼舘 直樹; 中村 信行
Poster presentation, Japanese, 原子衝突学会第45回年会, Domestic conference
08 Dec. 2020 - 電子ビームイオントラップ用無絶縁高温超伝導コイルの評価
河野 泰隆; 坂上 裕之; 寺﨑 義朗; 柳 長門; 中村 信行
Poster presentation, Japanese, 原子衝突学会第45回年会, Domestic conference
08 Dec. 2020 - 遷移確率の測定を目的としたランタノイドイオンのレーザー誘起 ブレークダウン分光分析Ⅰ
直井 祐樹; 岩田 昌幸; 田中 雅臣; 和南城 伸也; 関口 雄一郎; Gediminas Gaigalas; 坂上 裕之; 加藤 太治; 村上 泉; 田沼 肇; 中村信行
Poster presentation, Japanese, 原子衝突学会第45回年会, Domestic conference
08 Dec. 2020 - 遷移確率の測定を目的としたランタノイドイオンのレーザー誘起 ブレークダウン分光分析II
岩田 昌幸; 直井 祐樹; 田中 雅臣; 和南城 伸也; 関口 雄一郎; Gediminas Gaigalas; 坂上 裕之; 加藤 太治; 村上 泉; 田沼 肇; 中村信行
Poster presentation, Japanese, 原子衝突学会第45回年会, Domestic conference
08 Dec. 2020 - 強制非平衡イオン分光による重元素多価イオンの電子衝突電離断面積測定の試み
佐々木康; 物部将士; 中村信行; 坂上裕之; 村上泉; 加藤太治
Poster presentation, Japanese, プラズマ・核融合学会 第37回年会, Domestic conference
03 Dec. 2020 - 遷移確率の測定を目的としたエルビウムイオンのレーザー誘起ブレークダウン分光分析
直井祐樹; 田中雅臣; 和南城伸也; 関口雄一郎; Gediminas Gaigalas; 坂上裕之; 加藤太治; 村上泉; 田沼肇; 中村信行
Oral presentation, Japanese, 日本物理学会2020年秋季大会, Domestic conference
08 Sep. 2020 - Analysis of the energy dependence of the emission lines in Rh- to Cd-like ions through CR Modeling
Priti; Naoki Kimura; Ryunosuke Kodama; Naoki Numadate; Nobuyuki Nakamura
Oral presentation, English, 日本物理学会2020年秋季大会, Domestic conference
08 Sep. 2020 - 放射性再結合X線の偏光度測定
沼舘直樹; 大石晋平; 都築豊; 渡辺伸; 内田悠介; 米田浩基; 小高裕和; 高橋忠幸; 櫻井誠; 渡邉裕文; 中村信行
Oral presentation, Japanese, 日本物理学会第75回年次大会, Domestic conference
16 Mar. 2020 - Observation and Identification of Visible Transitions in Tungsten Ions
Priti; Daiji Kato; Izumi Murakami; Hiroyuki A. Sakaue; Nobuyuki Nakamura
Oral presentation, Japanese, 日本物理学会第75回年次大会, Domestic conference
16 Mar. 2020 - Cd様-Rh様多価イオンの可視/極端紫外領域の発光観測
児玉龍之介; 木村直樹; 鈴木健人; 物部 将士; 沼舘直樹; 東俊行; 中村信行
Oral presentation, Japanese, 2019年合同素過程研究会, Domestic conference
25 Dec. 2019 - Analysis of Visible Transitions in WIX and WX observed with an Electron Beam Ion Trap
Priti; Daiji Kato; Izumi Murakami; Hiroyuki A. Sakaue; Nobuyuki Nakamura
Oral presentation, Japanese, 2019年合同素過程研究会, Domestic conference
25 Dec. 2019 - INTERACTIONS OF SLOW HIGHLY CHARGED Biq+ IONS WITH HOPG SURFACE
Susanta Das; Hayato Ohashi; Nobuyuki Nakamura
Poster presentation, English, 23rd International Workshop on Inelastic Ion-Surface Collisions (IISC-23), International conference
20 Nov. 2019 - 電子ビームイオントラップ中へのバッファーガス導入と多価イオン可視光遷移波長測定への応用
木村直樹; 児玉龍之介; 鈴木健人; 大石晋平; 和田道治; 岡田邦宏; 大前宣昭; 香取秀俊; 中村信行
Oral presentation, Japanese, 日本物理学会2019年秋季大会, Domestic conference
12 Sep. 2019 - バリウム多価イオン電離過程の特異なエネルギー依存性
木村直樹; 沼館直樹; 物部将士; 児玉龍之介; 鈴木健人; 和田道治; 岡田邦宏; 東俊行; 中村信行
Oral presentation, Japanese, 日本物理学会2019年秋季大会, Domestic conference
12 Sep. 2019 - 二電子性再結合X線の偏光度測定I
都築豊; 渡辺伸; 大石晋平; 沼館直樹; 櫻井誠; 渡邉裕文; 中村信行; 内田悠介; 米田浩基; 小高裕和; 高橋忠幸
Oral presentation, Japanese, 日本物理学会2019年秋季大会, Domestic conference
12 Sep. 2019 - 二電子性再結合X線の偏光度測定II
大石晋平; 沼館直樹; 都築豊; 渡辺伸; 内田悠介; 米田浩基; 小高裕和; 高橋忠幸; 櫻井誠; 渡邉裕文; 中村信行
Oral presentation, Japanese, 日本物理学会2019年秋季大会, Domestic conference
12 Sep. 2019 - 電子ビームイオントラップを用いたエルビウムイオンの可視領域発光線の観測
市東佑介; 中村信行
Poster presentation, Japanese, 原子衝突学会第44回年会, Domestic conference
06 Sep. 2019 - Pd様イオンの長寿命準安定状態を介した電離過程の観測とその応用
木村直樹; 児玉龍之介; 鈴木健人; 沼舘直樹; 東俊行; 中村信行
Poster presentation, Japanese, 原子衝突学会第44回年会, Domestic conference
06 Sep. 2019 - Modeling of spectra from multiply charged tungsten ions observed with CoBIT
Priti; Daiji Kato; Izumi Murakami; Hiroyuki A. Sakaue; Nobuyuki Nakamura
Poster presentation, English, 原子衝突学会第44回年会, Domestic conference
06 Sep. 2019 - Li様Biイオンへの二電子性再結合X線の偏光度測定
大石晋平; 沼館直樹; 都築豊; 渡辺伸; 内田悠介; 米田浩基; 小高裕和; 高橋忠幸; 櫻井誠; 渡邉裕文; 中村信行
Poster presentation, Japanese, 原子衝突学会第44回年会, Domestic conference
06 Sep. 2019 - Si/CdTeコンプトンカメラの原子物理実験における偏光測定への応用
都築豊; 渡辺伸; 大石晋平; 沼館直樹; 櫻井誠; 渡邉裕文; 中村信行; 内田悠介; 米田浩基; 小高裕和; 高橋 忠幸
Poster presentation, Japanese, 原子衝突学会第44回年会, Domestic conference
06 Sep. 2019 - Bi多価イオンのL殻放射性再結合X線に対する偏光度測定
沼舘直樹; 大石晋平; 都築豊; 渡辺伸; 内田悠介; 米田浩基; 小高裕和; 高橋忠幸; 櫻井誠; 渡邉裕文; 中村信行
Poster presentation, Japanese, 原子衝突学会第44回年会, Domestic conference
05 Sep. 2019 - レーザー誘起ブレークダウン分光分析装置を用いたエルビウムの可視域発光の観測
直井祐樹; 横田大地; 田中雅臣; 和南城伸也; 関口雄一郎; Gediminas Gaigalas; 坂上裕之; 加藤太治; 村上泉; 田沼肇; 中村信行
Poster presentation, Japanese, 原子衝突学会第44回年会, Domestic conference
05 Sep. 2019 - バリウムおよびヨウ素多価イオンの可視／極端紫外領域の発光観測
児玉龍之介; 木村直樹; 鈴木健人; 物部将士; 沼舘直樹; 東俊行; 中村信行
Poster presentation, Japanese, 原子衝突学会第44回年会, Domestic conference
05 Sep. 2019 - 極低温多価イオン源用小型超伝導コイルの開発
鈴木健人; 木村直樹; 児玉龍之介; 和田道治; 岡田邦宏; 中村信行; 大前宣昭; 香取秀俊
Poster presentation, Japanese, 原子衝突学会第44回年会, Domestic conference
05 Sep. 2019 - Laboratory spectroscopic studies of heavy ions of astrophysical interest
NAKAMURA Nobuyuki
Oral presentation, Japanese, 宇宙における物質進化(r-EMU)--原子核・原子・分子--第1回シンポジウム, Domestic conference
02 Aug. 2019 - Quantum electrodynamics of highly charged heavy ions studied with state-of-the-art cosmic x-ray detectors
中村信行
Others, Japanese, 新学術領域研究「宇宙観測検出器と量子ビームの出会い。新たな応用への架け橋。」ワークショップ（第1回領域全体会議）, Domestic conference
15 Jul. 2019 - Tungsten spectra observed with an electron beam ion trap
NAKAMURA Nobuyuki
Invited oral presentation, English, Atomic and molecular data for plasma applications, Satellite Workshop of XXXIV ICPIG & ICRP-10, Invited, International conference
14 Jul. 2019 - VISIBLE SPECTROSCOPY OF MULTIPLY CHARGED IONS WITH A COMPACT ELECTRON BEAM ION TRAP
NAKAMURA Nobuyuki
Invited oral presentation, English, 13th International Colloquium on Atomic Spectra and Oscillator Strengths for Astrophysical and Laboratory Plasmas (ASOS2019), Invited, International conference
24 Jun. 2019 - Measurement of High-Multipole Forbidden Transitions in Highly-Charged Ions Produced with EBITs
NAKAMURA Nobuyuki
Invited oral presentation, English, 20th International Conference on Atomic Processes in Plasmas (APiP2019), Invited, International conference
09 Apr. 2019 - 太陽大気プラズマ診断への実験室からの貢献
中村信行
Invited oral presentation, Japanese, 日本物理学会第74回年次大会, Domestic conference
17 Mar. 2019 - 中性子星合体による重元素合成の基礎研究としての多価イオン電荷交換分光II
山田陽平; 阿久津卓土; 沼舘直樹; 田沼肇; 中村信行; 関口雄一郎; 和南城伸也; 坂上裕之; 加藤太治; 村上泉; 田中雅臣; Gediminas Gaigalas
Oral presentation, Japanese, 日本物理学会第74回年次大会, Domestic conference
15 Mar. 2019 - EBITを用いた銀様多価イオンからの電子八重極子遷移の観測
坂上裕之; 加藤太治; 村上泉; 大橋隼人; 中村信行
Oral presentation, Japanese, 日本物理学会第74回年次大会, Domestic conference
15 Mar. 2019 - 銀様多価イオンの電気八重極遷移発光線強度の原子番号依存性
加藤太治; 坂上裕之; 村上泉; 大橋隼人; 中村信行
Oral presentation, Japanese, 日本物理学会第74回年次大会, Domestic conference
15 Mar. 2019 - クリプトンイオンの磁気双極子遷移の観測
近藤丈洋; 田中雅臣; 和南城伸也; 関口雄一郎; Gediminas Gaigalas; 坂上裕之; 加藤太治; 村上泉; 田沼肇; 中村信行
Oral presentation, Japanese, 日本物理学会第74回年次大会, Domestic conference
15 Mar. 2019 - 電子ビームイオントラップによるクリプトンイオンの磁気双極子遷移の観測
近藤丈洋; 田中雅臣; 和南城伸也; 関口雄一郎; Gediminas Gaigalas; 坂上裕之; 加藤太治; 村上泉; 田沼肇; 中村信行
Oral presentation, Japanese, 「原子分子過程研究と受動・能動分光計測の高度化のシナジー効果によるプラズマ科学の展開」「原子分子データ応用フォーラムセミナー」合同研究会, Domestic conference
20 Dec. 2018 - 先端的宇宙X線検出器で探る 多価重イオンの物理
中村信行
Oral presentation, Japanese, 新学術領域研究「宇宙観測検出器と量子ビームの出会い。新たな応用への架け橋。」キックオフシンポジウム, Domestic conference
17 Dec. 2018 - Recent experiments with the Tokyo-EBIT and CoBIT
NAKAMURA Nobuyuki
Oral presentation, English, TMU Symposium on Physics of Highly Charged Ions, International conference
15 Dec. 2018 - Visible spectra of multiply charged Ba ions observed with a compact electron beam ion trap
Kento SUZUKI; Naoki KIMURA; Ryunosuke KODAMA; Shimpei OISHI; Michiharu WADA; Kunihiro OKADA; Noriaki OHMAE; Hidetoshi KATORI; Nobuyuki NAKAMURA
Oral presentation, English, TMU Symposium on Physics of Highly Charged Ions, International conference
15 Dec. 2018 - Recent results on tungsten spectra obtained with a compact electron beam ion trap
NAKAMURA Nobuyuki
Invited oral presentation, English, 1st Meeting of the Global Network for the Atomic and Molecular Physics of Plasmas, Invited, International conference
19 Nov. 2018 - Collisional and radiative processes of highly charged iron ions studied with an electron beam ion trap
Nobuyuki Nakamura
Invited oral presentation, English, 2nd Asia-Pacific Conference on Plasma Physics (AAPPS-DPP2018), Invited, International conference
12 Nov. 2018 - Observation of 4f-5s Electric Octupole (E3) Transition in the EUV Spectrum of Ag-like Tungsten
H. A. Sakaue; D. Kato; I. Murakami; H. Ohashi; N. Nakamura
Invited oral presentation, English, 13th International Symposium on Electron Beam Ion Sources and Traps (EBIST2018), Invited, International conference
27 Oct. 2018 - Modeling for emission line spectra of tungsten highly charged ions and its applications to tungsten measurements for fusion plasmas
Daiji Kato; Shota Era; Hiroyuki A. Sakaue; Izumi Murakami; Motoshi Goto; Tetsutaro Oishi; Chihiro Suzuki; Nobuyuki Nakamura; Shigeru Morita
Invited oral presentation, English, 13th International Symposium on Electron Beam Ion Sources and Traps (EBIST2018), Invited, International conference
26 Oct. 2018 - Applications of buffer gas in a compact EBIT for reliable spectroscopic calibration
Naoki Kimura; Ryuunosuke Kodama; Kenta Suzuki; Shimpei Oishi; Michiharu Wada; Kunihiro Okada; Noriaki Ohmae; Hidetoshi Katori; Nobuyuki Nakamura
Invited oral presentation, English, 13th International Symposium on Electron Beam Ion Sources and Traps (EBIST2018), Invited, International conference
26 Oct. 2018 - 4f-5s電気八重極子遷移(E3)の観測とその強いZ依存性
坂上裕之; 加藤太治; 村上泉; 大橋隼人; 中村信行
Poster presentation, Japanese, 原子衝突学会第43回年会, Domestic conference
13 Oct. 2018 - バリウム多価イオン可視光遷移波長の直接測定
木村直樹; 児玉龍之介; 鈴木健人; 大石晋平; 和田道治; 岡田邦宏; 大前宣昭; 香取秀俊; 中村信行
Poster presentation, Japanese, 原子衝突学会第43回年会, Domestic conference
13 Oct. 2018 - 二電子性再結合X線の偏光度測定I. 実験
市東佑介; 大石晋平; 都築豊; 米田浩基; 小高裕和; 櫻井誠; 渡邉裕文; 渡辺伸; 高橋忠幸; 中村信行
Poster presentation, Japanese, 原子衝突学会第43回年会, Domestic conference
13 Oct. 2018 - 二電子性再結合X線の偏光度測定Ⅱ. 偏光度の導出
大石晋平; 市東佑介; 都築豊; 米田浩基; 小高裕和; 櫻井誠; 渡邉裕文; 渡辺伸; 高橋忠幸; 中村信行
Poster presentation, Japanese, 原子衝突学会第43回年会, Domestic conference
13 Oct. 2018 - 鉄多価イオン－電子衝突における共鳴励起過程の観測III
児玉龍之介; 物部将士; 坂上裕之; 加藤太治; 村上泉; 原弘久; 渡邊鉄哉; 中村信行
Oral presentation, Japanese, 日本物理学会2018年秋季大会, Domestic conference
11 Sep. 2018 - Development of a high temperature superconducting magnet for use in a cryogen-free electron beam ion trap
Toshihiro Tamai; Hiroyuki A Sakaue; Yoshiro Terazaki; Nagato Yanagi; Nobuyuki Nakamura
Poster presentation, English, 19th International Conference Physics of Highly Charged Ions (HCI2018), International conference
06 Sep. 2018 - Resonant electron impact excitation of highly charged Fe ions studied with a compact electron beam ion trap
Masashi Monobe; Takashi Tsuda; Hiroyuki A. Sakaue; Daiji Kato; Izumi Murakami; Hirohisa Hara; Tetsuya Watanabe; Nobuyuki Nakamura
Poster presentation, English, 19th International Conference Physics of Highly Charged Ions (HCI2018), International conference
06 Sep. 2018 - Charge Exchange Spectroscopy for Multiply Charged Ions of Heavy Elements in the Extreme Ultra-Violet Region
Takumi Ohna; Naoki Numadate; Yohei Yamada; Masaomi Tanaka; Shinya Wanajo; Yuichiro Sekiguchi; Daiji Kato; Izumi Murakami; Hiroyuki A. Sakaue; Nobuyuki Nakamura; Hajime Tanuma
Poster presentation, English, 19th International Conference Physics of Highly Charged Ions (HCI2018), International conference
06 Sep. 2018 - Visible spectra of heavy ions with an open 4f shell
Shunichi Murata; Takayuki Nakajima; Marianna S; Safronova; Ulyana I. Safronova; Nobuyuki Nakamura
Poster presentation, English, 19th International Conference Physics of Highly Charged Ions (HCI2018), International conference
04 Sep. 2018 - Observation of electric octupole (E3) transitions in the EUV spectra of tungsten ions
H. A. Sakaue; D. Kato; I. Murakami; H. Ohashi; N. Nakamura
Invited oral presentation, English, 19th International Conference Physics of Highly Charged Ions (HCI2018), International conference
03 Sep. 2018 - Visible Spectroscopy of Highly Charged Barium Ions in a Compact Electron Beam Ion Trap with a Buffer Gas Calibration Method
N. Kimura; R. Kodama; K. Suzuki; S. Ohishi; M. Wada; K. Okada; N. Ohamae; H. Katori; N. Nakamura
Oral presentation, English, 19th International Conference Physics of Highly Charged Ions (HCI2018), International conference
03 Sep. 2018 - Visible spectra of multiply charged heavy ions obtained with a compact electron beam ion trap
NAKAMURA Nobuyuki
Oral presentation, English, The 7th China- Japan-Korea Joint Seminar on Atomic and Molecular Processes in Plasma (AMPP2018), International conference
26 Jul. 2018 - 電子ビームイオントラップによるランタノイドイオンのEUVスペクトル測定
Safdar ALI; 加藤弘行; 中村信行
Oral presentation, Japanese, 「原子分子過程研究と受動・能動分光計測の高度化のシナジー効果によるプラズマ科学の展開」研究会, Domestic conference
21 Dec. 2017 - 4f開殻重元素イオンの可視域発光スペクトルの観測
村田隼一; 中島貴之; Mariana S; Safronova; Ulyana I. Safronova; 中村信行
Oral presentation, Japanese, 「原子分子過程研究と受動・能動分光計測の高度化のシナジー効果によるプラズマ科学の展開」研究会, Domestic conference
21 Dec. 2017 - EUV spectra of highly charged ions observed with a compact electron beam ion trap
Nobuyuki Nakamura
Invited oral presentation, English, EUV Litho 2017 Source Workshop, International conference
07 Nov. 2017 - 鉄多価イオン 電子衝突における共鳴励起過程の観測II
津田峻志; 清水恵理奈; Safdar Ali; 坂上裕之; 加藤太治; 村上泉; 原弘久; 渡邊鉄哉; 中村信行
Oral presentation, Japanese, 日本物理学会2017年秋季大会, Domestic conference
21 Sep. 2017 - プロメチウム様イオン発光スペクトルの時間発展計測
物部将士; 加藤太治; 中村信行
Oral presentation, Japanese, 日本物理学会2017年秋季大会, Domestic conference
21 Sep. 2017 - 多価イオン共同冷却実験に向けたイオン生成と捕捉
木村直樹; 和田道治; 岡田邦宏; 加藤英俊; 中村信行; 大前宣昭; 香取秀俊
Oral presentation, Japanese, 日本物理学会2017年秋季大会, Domestic conference
21 Sep. 2017 - 中性子星合体による重元素合成の基礎研究としての多価イオン電荷交換分光
阿久津卓土; 沼舘直樹; 島田健人; 山田陽平; 田沼肇; 中村信行; 関口雄一郎; 和南城伸也; 坂上裕之; 加藤大治; 村上泉; 田中雅臣
Oral presentation, Japanese, 日本物理学会2017年秋季大会, Domestic conference
21 Sep. 2017 - Status of the Tokyo Electron Beam Ion Trap
中村信行; 櫻井誠; 渡邉裕文
Poster presentation, Japanese, 原子衝突学会第42回年会, Domestic conference
09 Sep. 2017 - 準安定状態へのポピュレーショントラップの時間発展計測
物部将士; 加藤太治; 中村信行
Poster presentation, Japanese, 原子衝突学会第42回年会, Domestic conference
09 Sep. 2017 - Tokyo electron beam ion trap の X 線観測による状態診断
寺西若葉; 渡邉裕文; 櫻井誠; 中村信行
Poster presentation, Japanese, 原子衝突学会第42回年会, Domestic conference
09 Sep. 2017 - タングステンイオン W VII-XIV の可視・EUV 領域発光スペクトルの観測
三田百恵; 村上泉; 加藤太治; 坂上裕之; 中村信行
Poster presentation, Japanese, 原子衝突学会第42回年会, Domestic conference
08 Sep. 2017 - 無冷媒電子ビームイオントラップのための高温超伝導コイルの製作
玉井駿宏; 寺西若葉; 坂上裕之; 柳長門; 中村信行
Poster presentation, Japanese, 原子衝突学会第42回年会, Domestic conference
08 Sep. 2017 - 冷却多価イオン生成に向けたイオントラップ装置の開発とその機能試験
木村直樹; 和田道治; 岡田邦宏; 加藤英俊; 中村信行; 大前宣昭; 香取英俊
Poster presentation, Japanese, 原子衝突学会第42回年会, Domestic conference
08 Sep. 2017 - 連中性子星合体の r-process 元素によるオパシティの理論計算
加藤太治; 田中雅臣; Gediminas Gaigalas; 和南城伸也; 関口雄一郎; 中村信行; 田沼肇; 坂上裕之; 村上泉
Poster presentation, Japanese, 原子衝突学会第42回年会, Domestic conference
08 Sep. 2017 - タングステン多価イオンの未同定発光線の探索
近藤丈洋; 村上泉; 加藤太治; 坂上裕之; 中村信行
Poster presentation, Japanese, 原子衝突学会第42回年会, Domestic conference
08 Sep. 2017 - 4f開殻重元素イオンの可視域発光スペクトルの観測
村田隼一; 中島貴之; Marianna S; Safronova; Ulyana I. Safronova; 中村信行
Poster presentation, Japanese, 原子衝突学会第42回年会, Domestic conference
08 Sep. 2017 - レーザー誘起ブレークダウン分光分析装置の立ち上げ
横田大地; 中村信行; 田沼肇; 関口雄一郎; 和南城伸也; 坂上裕之; 加藤太治; 村上泉; Gediminas Gaigalas; 田中雅臣
Poster presentation, Japanese, 原子衝突学会第42回年会, Domestic conference
08 Sep. 2017 - Theoretical study on the soft X-ray spectra of E1 transition of W LV ion
Jiaoxia Yang; Xiaobin Ding; Rui Sun; Fumihiro Koike; Izumi Murakami; Daiji Kato; Hiroyuki Sakaue; Nobuyuki Nakamura; Chenzhong Don
Poster presentation, English, 30th International Conference on Photonic, Electronic and Atomic Collisions (ICPEAC XXX), International conference
31 Jul. 2017 - CoBIT Spectroscopy of Mo and Y ions relevant to beyond EUV source development
Emma Sokell; Safdar Ali; John Sheil; Hiroyuki Kato; Nobuyuki Nakamura
Poster presentation, English, 30th International Conference on Photonic, Electronic and Atomic Collisions (ICPEAC XXX), International conference
31 Jul. 2017 - Extreme ultraviolet spectra of multiply charged tungsten ions
Momoe Mita; Hiroyuki A. Sakaue; Daiji Kato; Izumi Murakami; Nobuyuki Nakamura
Oral presentation, English, 30th International Conference on Photonic, Electronic and Atomic Collisions (ICPEAC XXX), International conference
28 Jul. 2017 - Collisional-radiative model for EUV spectra of Pm-like ions in EBIT
Daiji Kato; Hiroyuki A. Sakaue; Izumi Murakami; Nobuyuki Nakamura
Poster presentation, English, 30th International Conference on Photonic, Electronic and Atomic Collisions (ICPEAC XXX), International conference
28 Jul. 2017 - Visible M1 transitions in 4f open shell heavy ions observed with an electron beam ion trap
Shunichi Murata; Takayuki Nakajima; Marianna Safronova; Ulyana Safronova; Nobuyuki Nakamura
Poster presentation, English, 30th International Conference on Photonic, Electronic and Atomic Collisions (ICPEAC XXX), International conference
28 Jul. 2017 - Resonant excitation of highly charged Fe ions observed with a compact electron beam ion trap
Takashi Tsuda; Erina Shimizu; Safdar Ali; Hiroyuki Sakaue; Daiji Kato; Izumi Murakami; Hirohisa Hara; Tetsuya Watanabe; Nobuyuki Nakamura
Poster presentation, English, 30th International Conference on Photonic, Electronic and Atomic Collisions (ICPEAC XXX), International conference
28 Jul. 2017 - Measurements of time-resolved EUV spectra for studying the population kinetics in an electron beam ion trap plasma
Masashi Monobe; Daiji Kato; Nobuyuki Nakamura
Poster presentation, English, 30th International Conference on Photonic, Electronic and Atomic Collisions (ICPEAC XXX), International conference
28 Jul. 2017 - Emission line spectra of the 2s-2p transitions of S VIII-S XIII in the extreme ultraviolet region 160–300 A
Safdar Ali; Hiroyuki Kato; Nobuyuki Nakamura
Poster presentation, English, 30th International Conference on Photonic, Electronic and Atomic Collisions (ICPEAC XXX), International conference
28 Jul. 2017 - 無冷媒高温超伝導コイルを用いた電子ビームイオントラップの開発
玉井駿宏; 寺西若葉; 坂上裕之; 柳長門; 中村信行
Oral presentation, Japanese, 日本物理学会 第72回年次大会, Domestic conference
19 Mar. 2017 - 線形コンバインドトラップ内での冷却多価イオン生成に向けたOff-Axis電子ビーム源の開発
木村直樹; 和田道治; 岡田邦宏; 中村信行; 大前宣昭; 香取秀俊
Oral presentation, Japanese, 日本物理学会 第72回年次大会, Domestic conference
19 Mar. 2017 - CoBIT中のFe14+イオンのEUV発光線強度における共鳴励起効果
加藤太治; 坂上裕之; 村上泉; 津田峻志; 中村信行
Oral presentation, Japanese, 日本物理学会 第72回年次大会, Domestic conference
19 Mar. 2017 - タングステンイオンW VII-XIVの可視・EUV領域発光スペクトルの観測
三田百恵; 村上泉; 加藤太治; 坂上裕之; 中村信行
Oral presentation, Japanese, 日本物理学会 第72回年次大会, Domestic conference
19 Mar. 2017 - 4f開殻重元素イオンの可視域発光スペクトルの観測
村田隼一; 中島貴之; 中村信行
Oral presentation, Japanese, 日本物理学会 第72回年次大会, Domestic conference
19 Mar. 2017 - EBITを用いた多価イオン発光スペクトルの可視、VUV及びEUV分光測定
坂上裕之; 中村信行; 加藤太治; 村上泉
Oral presentation, Japanese, 日本物理学会 第72回年次大会, Domestic conference
19 Mar. 2017 - Line Analysis of Extreme Ultraviolet Spectra from Highly Charged Molybdenum in the 22-30 nm Region
Safdar Ali; Hiroyuki Kato; Nobuyuki Nakamura
Oral presentation, English, 日本物理学会 第72回年次大会, Domestic conference
19 Mar. 2017 - Tungsten Spectroscopy with an Electron Beam Ion Trap (EBIT)
Nobuyuki Nakamura
Oral presentation, English, China-Japan Collaborative Workshop on Stability and Transport of Edge Plasmas, International conference
04 Mar. 2017 - Time evolution measurements of an EBIT plasma
Masashi Monobe; Nobuyuki Nakamura
Oral presentation, English, China-Japan Collaborative Workshop on Stability and Transport of Edge Plasmas, International conference
04 Mar. 2017 - 鉄多価イオン-電子衝突における共鳴励起過程の観測
津田峻志; 清水恵理奈; Safdar Ali; 坂上裕之; 加藤太治; 村上泉; 原弘久; 渡邊鉄哉; 中村信行
Oral presentation, Japanese, 「プラズマ科学における分光計測の高度化と原子分子過程研究の新展開」「原子分子データ応用フォーラムセミナー」合同研究会, Domestic conference
22 Dec. 2016 - プロメチウム様多価イオンの5p-5s共鳴線の謎
加藤太治; 坂上裕之; 村上泉; 中村信行
Oral presentation, Japanese, 「プラズマ科学における分光計測の高度化と原子分子過程研究の新展開」「原子分子データ応用フォーラムセミナー」合同研究会, Domestic conference
22 Dec. 2016 - タングステン多価イオンの可視・EUV領域発光スペクトルの観測
三田百恵; 村上泉; 加藤太治; 坂上裕之; 中村信行
Oral presentation, Japanese, 「プラズマ科学における分光計測の高度化と原子分子過程研究の新展開」「原子分子データ応用フォーラムセミナー」合同研究会, Domestic conference
20 Dec. 2016 - Observation and Identification of Tungsten Spectra Observed with an Electron Beam Ion Trap
NAKAMURA Nobuyuki; SAKAUE Hiroyuki A; KATO Daiji; MURAKAMI Izumi
Invited oral presentation, English, Technical Meeting on Uncertainty Assessment and Benchmark Experiments for Atomic and Molecular Data for Fusion Applications, Invited, International conference
19 Dec. 2016 - タングステン多価イオン発光線の観測
表一輝; 三田百恵; 近藤丈洋; 加藤太治; 村上泉; 坂上裕之; 中村信行
Poster presentation, Japanese, 原子衝突学会第41回年会, Domestic conference
10 Dec. 2016 - 高温超伝導コイルを用いた無冷媒超伝導 EBIT の開発
玉井駿宏; 寺西若葉; 坂上裕之; 中村信行
Poster presentation, Japanese, 原子衝突学会第41回年会, Domestic conference
10 Dec. 2016 - エルビウム多価イオンの発光線観測
村田隼一; 中島貴之; 中村信行
Poster presentation, Japanese, 原子衝突学会第41回年会, Domestic conference
10 Dec. 2016 - 多価イオン精密分光に向けた冷却コンバインドイオントラップの製作
木村直樹; 岡田邦宏; 和田道治; 中村信行; 大前宣昭; 香取秀俊
Oral presentation, Japanese, 日本物理学会2016年秋季大会, Domestic conference
16 Sep. 2016 - SOLAR WIND CHARGE EXCHANGE IN LABORATORY - OBSERVATION OF FORBIDDEN X-RAY TRANSITIONS
Naoki Numadate; Kunihiro Okada; Nobuyuki Nakamura; Hajime Tanuma
Poster presentation, English, 18th International Conferences on the Physics of Highly Charged Ions (HCI2016), International conference
15 Sep. 2016 - LHDプラズマ中近紫外域分光による23-28価タングステン相対密度データの計測
藤井恵介; 加藤太治; 中村信行; 後藤基志; 森田繁; 蓮尾昌裕
Oral presentation, Japanese, 日本物理学会2016年秋季大会, Domestic conference
15 Sep. 2016 - 鉄多価イオン発光線強度比の電子密度依存性
坂上裕之; 中村信行; 加藤太治; 村上泉
Oral presentation, Japanese, 日本物理学会2016年秋季大会, Domestic conference
14 Sep. 2016 - 鉄多価イオン 電子衝突における共鳴励起過程の観測
津田峻志; 清水恵理奈; Safdar Ali; 坂上裕之; 加藤太治; 村上泉; 原弘久; 渡邊鉄哉; 中村信行
Oral presentation, Japanese, 日本物理学会2016年秋季大会, Domestic conference
14 Sep. 2016 - 小型電子ビームイオントラップによる重元素多価イオンの極端紫外分光
加藤弘行; 岸良子文; Safdar Ali; Emma Sokell; John Sheil; 中村信行
Oral presentation, Japanese, 日本物理学会2016年秋季大会, Domestic conference
14 Sep. 2016 - EUV SPECTROSCOPY OF HIGH CHARGED SULFUR RELEVANT TO ASTROPHYSICAL PLASMAS
Safdar Ali; Kato Hiroyuki; Nobuyuki Nakamura
Invited oral presentation, English, 18th International Conferences on the Physics of Highly Charged Ions (HCI2016), International conference
13 Sep. 2016 - CoBIT SPECTROSCOPY OF Mo AND Y IONS RELEVANT TO BEYOND EUV SOURCE DEVELOPMENT
Emma Sokell; Safdar Ali; John Sheil; Hiroyuki Kato; Nobuyuki Nakamura
Invited oral presentation, English, 18th International Conferences on the Physics of Highly Charged Ions (HCI2016), Invited, International conference
13 Sep. 2016 - VISIBLE SPECTROSCOPY OF HIGHLY CHARGED HOLMIUM IONS OBSERVED WITH A COMPACT ELECTRON BEAM ION TRAP
Takayuki Nakajima; Kunihiro Okada; Michiharu Wada; Vladimir A. Dzuba; Marianna S; Safronova; Ulyana I. Safronova; Noriaki Ohmae; Hidetoshi Katori; Nobuyuki Nakamuraa
Poster presentation, English, 18th International Conferences on the Physics of Highly Charged Ions (HCI2016), International conference
13 Sep. 2016 - EXTREME ULTRAVIOLET SPECTROSCOPY OF HIGHLY CHARGED XE AND BA WITH A COMPACT ELECTRON BEAM ION
Safdar Ali; Nobuyuki Nakamura
Poster presentation, English, 18th International Conferences on the Physics of Highly Charged Ions (HCI2016), International conference
13 Sep. 2016 - RESONANT EXCITATION OF FE14+ OBSERVED WITH A COMPACT ELECTRON BEAM ION TRAP
Takashi Tsuda; Erina Shimizu; Safdar Ali; Hiroyuki A. Sakaue; Daiji Kato; Izumi Murakami; Hirohisa Hara; Tetsuya Watanabe; Nobuyuki Nakamura
Poster presentation, English, 18th International Conferences on the Physics of Highly Charged Ions (HCI2016), International conference
13 Sep. 2016 - POPULATION TRAPPING: THE MECHANISM FOR THE LOST RESONANCE LINES IN Pm-LIKE IONS
Daiji Kato; Nobuyuki Nakamura
Invited oral presentation, English, 18th International Conferences on the Physics of Highly Charged Ions (HCI2016), Invited, International conference
12 Sep. 2016 - Observation of visible and EUV emission spectra of tungsten ions
MITA Momoe; NAKAMURA Nobuyuki
Oral presentation, English, The 6th China-Japan-Korea Joint Seminar on Atomic and Molecular Processes in Plasma (AMPP2016), International conference
27 Jul. 2016 - Observation of resonant excitation of Fe14+
TSUDA Takashia; SHIMIZU Erina; Safdar ALI; SAKAUE Hiroyuki A; KATO Daiji; MURAKAMI Izumi; HARA Hirohisa; WATANABE Tetsuya; NAKAMURA Nobuyuki
Oral presentation, English, The 6th China-Japan-Korea Joint Seminar on Atomic and Molecular Processes in Plasma (AMPP2016), International conference
27 Jul. 2016 - Spectroscopy of highly charged iron ions relevant to astrophysical plasmas
Safdar Ali; Erina Shimizu; Hiroyuki A. Sakaue; Daiji Kato; Izumi Murakami; Norimasa Yamamoto; Hirohisa Hara; Tetsuya Watanabe; Nobuyuki Nakamura
Oral presentation, English, 19th International Conference on Atomic Processes in Plasmas
05 Apr. 2016 - ホルミウム多価イオンの可視領域発光線測定
中島貴之; 岡田邦宏; 和田道治; 大前宣昭; 香取秀俊; 中村信行
Oral presentation, Japanese, 日本物理学会 第71回年次大会, Domestic conference
21 Mar. 2016 - 太陽風起源禁制X線遷移の地上での再現実験
沼舘直樹; 島田健人; 内倉義届; 島谷紘史; 石田卓也; 山田真也; 江副祐一郎; 石崎欣尚; 大橋隆哉; 岡田邦宏; 中村信行; 篠崎慶亮; 満田和久; L.Liu; J-G.Wang; 田沼肇
Oral presentation, Japanese, 日本物理学会 第71回年次大会, Domestic conference
21 Mar. 2016 - Spectroscopic studies of multiply charged mid-Z ions in the EUV range
Safdar Ali; Erina Shimizu; Nobuyuki Nakamura
Oral presentation, English, 日本物理学会 第71回年次大会, Domestic conference
21 Mar. 2016 - Spectroscopy of highly charged holmium ions with an electron beam ion trap
Takayuki NAKAJIMA; Taichi SHIMAYA; Kunihiro OKADA; Michiharu WADA; Noriaki Ohmae; Hidetoshi KATORI; Nobuyuki NAKAMURA
Poster presentation, English, ERATO International Workshop: Challenges in Precision Science, Domestic conference
25 Jan. 2016 - Intensity ratio in EUV spectra of highly charged Fe ions: Experimental evaluation of astrophysical plasma model
Erina Shimizu; Safdar Ali; Takashi Tsuda; Hiroyuki A. Sakaue; Izumi Murakami; Hirohisa Hara; Daiji Kato; Tetsuya Watanabe; Nobuyuki Nakamura
Public discourse, Japanese, SOLAR AND SPACE PLASMA SEMINAR, NAOJ
02 Oct. 2015 - 電子ビームイオントラップによる Ni 様多価イオンの分光測定
岸良子文; Emma Sokell; 中村信行
Poster presentation, Japanese, 原子衝突学会第40回年会, Domestic conference
30 Sep. 2015 - 鉄多価イオンの発光線強度比による電子密度診断
津田峻志; 清水恵理奈; Safdar Ali; 坂上裕之; 加藤太治; 村上 泉; 原 弘久; 渡邊鉄哉; 中村信行
Poster presentation, Japanese, 原子衝突学会第40回年会, Domestic conference
30 Sep. 2015 - ホロミウム多価イオンの可視領域発光線測定
中島貴之; 岡田邦宏; 和田道治; 大前宣昭; 香取秀俊; 中村信行
Poster presentation, Japanese, 原子衝突学会第40回年会, Domestic conference
30 Sep. 2015 - 走査型トンネル顕微鏡によるグラファイト基板上イオン照射痕の観察
加藤弘行; 久保田海; 中村信行
Poster presentation, Japanese, 原子衝突学会第40回年会, Domestic conference
30 Sep. 2015 - 電子ビームイオントラップによるPm様多価イオンの分光測定
久保田海; 表一輝; 加藤太治; 村上泉; 坂上裕之; 中村信行
Oral presentation, Japanese, 原子衝突学会第40回年会, Domestic conference
29 Sep. 2015 - 電子ビームイオントラップを用いたタングステン多価イオン発光線の観測と同定
表一輝; 久保田海; 加藤太治; 村上泉; 坂上裕之; 中村信行
Poster presentation, Japanese, 原子衝突学会第40回年会, Domestic conference
28 Sep. 2015 - Compact EBIT (CoBIT)を用いたタングステン多価イオンのEUV分光計測
坂上裕之; 中村信行; 加藤太治; 村上泉
Poster presentation, Japanese, 原子衝突学会第40回年会, Domestic conference
28 Sep. 2015 - Introduction of highly charged ion studies at ILS/UEC
Nobuyuki NAKAMURA
Oral presentation, English, Workshop on observation of tungsten spectra and its analytical method, International conference
25 Sep. 2015 - EUV and visible spectra of tungsten ions with charge states around the Pm-like isoelectronic sequence
Kai Kubota; Kazuki Omote; Yusuke Kobayashi; Daiji Kato; Izumi Murakami; Hiroyuki A. SakaueA; Nobuyuki Nakamura
Oral presentation, English, Workshop on observation of tungsten spectra and its analytical method, International conference
25 Sep. 2015 - 電子ビームイオントラップによるPm様多価イオンの分光測定II
久保田海; 表一輝; 小林優介; 加藤太治; 村上泉; 坂上裕之; 中村信行
Oral presentation, Japanese, 日本物理学会 2015年秋季大会, Domestic conference
16 Sep. 2015 - 鉄多価イオンEUVスペクトル強度比の電子密度依存性
清水恵理奈; Safdar Ali; 坂上裕之; 加藤太治; 村上泉; 原弘久; 渡邊鉄哉; 中村信行
Oral presentation, Japanese, 日本物理学会 2015年秋季大会, Domestic conference
16 Sep. 2015 - Intensity ratio in EUV spectra of highly charged Fe ions: Experimental evaluation of astrophysical plasma model
E. Shimizu; S. Ali; H. Sakaue; D. Kato; I. Murakami; H. Hara; T. Watanabe; N. Nakamura
Poster presentation, English, XXIX International Conference on Photonic, Electronic, and Atomic Collisions (ICPEAC2015), International conference
28 Jul. 2015 - Near UV-visible line emission of tungsten highly charged ions in fusion plasmas
D. Kato; H. Sakaue; I. Murakami; M. Goto; T. Oishi; S. Morita; K. Fujii; N. Nakamura; A. Sasaki; F. Koike; X. Ding; C. Dong
Poster presentation, English, XXIX International Conference on Photonic, Electronic, and Atomic Collisions (ICPEAC2015), International conference
24 Jul. 2015 - EUV and visible spectroscopy of promethiumlike ions
Y. Kobayashi; D. Kato; I. Murakami; H. Sakaue; N. Nakamura
Poster presentation, English, XXIX International Conference on Photonic, Electronic, and Atomic Collisions (ICPEAC2015), International conference
24 Jul. 2015 - Ion extraction from a compact electron beam ion trap
T. Nakajima; T. Kanehara; Y. Yanaka; J. Yatsurugi; N. Nakamura
Poster presentation, English, XXIX International Conference on Photonic, Electronic, and Atomic Collisions (ICPEAC2015), International conference
24 Jul. 2015 - Challenge for laboratory observation of forbidden x-ray transitions in solar wind charge exchange
N. Numadate; K. Okada; N. Nakamura; H. Tanuma
Poster presentation, English, XXIX International Conference on Photonic, Electronic, and Atomic Collisions (ICPEAC2015), International conference
24 Jul. 2015 - プラズマ光源関連イオンのEBITによる分光測定III
岸良子文; Emma Sokell; 金原達彦; 中村信行
Oral presentation, Japanese, 日本物理学会 第70回年次大会
21 Mar. 2015 - 電子ビームイオントラップによるPm様多価イオンの分光測定
小林優介; 加藤太治; 村上泉; 坂上裕之; 中村信行
Oral presentation, Japanese, 日本物理学会 第70回年次大会
21 Mar. 2015 - High-resolution intensity ratio measurements in EUV spectral wavelength for ions of astrophysical ineterst
Safdar Ali; Erina Shimizu; Hiroyuki A. Sakaue; Daiji Kato; Izumi Murakami; Norimasa Yamamoto; Hirohisa Hara; Tetsuya Watanabe; Nobuyuki Nakamura
Oral presentation, English, The sixth international conference on Trapped Charged Particles and Fundamental Physics (TCP2014), International conference
04 Dec. 2014 - Spectroscopic studies of highly charged ions at the Tokyo electron beam ion trap facility
Nobuyuki NAKAMURA
Invited oral presentation, English, The sixth international conference on Trapped Charged Particles and Fundamental Physics (TCP2014), Invited, International conference
01 Dec. 2014 - EUV spectra of highly charged tungsten ions studied with an electron beam ion trap
H. A. Sakaue; D. Kato; N. Nakamura; I. Murakami
Poster presentation, English, The sixth international conference on Trapped Charged Particles and Fundamental Physics (TCP2014), International conference
01 Dec. 2014 - Spectroscopy of Highly Charged Ions with an Electron Beam Ion Trap
NAKAMURA Nobuyuki; SAKAUE Hiroyuki A; KATO Daiji; MURAKAMI Izumi
Nominated symposium, Japanese, Plasma Conference 2014, Domestic conference
21 Nov. 2014 - Electrical properties of semiconductors irradiated with highly charged heavy ions
Kai KUBOTA; Nobuyuki NAKAMURA; Yumi AIHARA; Kenya ADACHI; Shinji NOZAKI
Poster presentation, Japanese, 原子衝突学会第39回年会, Domestic conference
06 Oct. 2014 - Spectroscopy of highly charged ions relevant to light source developments in the EUV to soft x-ray region
Shimon KISHIRA; Tatsuhiko KANEHARA; Hayato OHASHI; Nobuyuki NAKAMURA
Poster presentation, Japanese, 原子衝突学会第39回年会, Domestic conference
06 Oct. 2014 - Studies of highly charged heavy ions at the Tokyo electron beam ion trap
Nobuyuki NAKAMURA
Invited oral presentation, English, 11th Asian International Seminar on Atomic and Molecular Physics (AISAMP11), Invited, International conference
06 Oct. 2014 - プラズマ光源関連イオンのEBITによる分光測定II
金原達彦; 岸良子文; 大橋隼人; 中村信行
Oral presentation, Japanese, 日本物理学会 2014年秋季大会, Domestic conference
09 Sep. 2014 - 鉄多価イオンのEUVスペクトル強度比における電子密度依存性測定
清水恵理奈; 坂上裕之; 加藤太治; 村上泉; 山本則正; 原弘久; 渡邊鉄哉; 中村信行
Oral presentation, Japanese, 日本物理学会 2014年秋季大会, Domestic conference
09 Sep. 2014 - INTERACTIONS OF SLOW HIGHLY CHARGED BISMUTH IONS WITH ZnO NANORODS
Susanta Das; Hayato Ohashi; Nobuyuki Nakamura
Poster presentation, English, 17th International Conferences on the Physics of Highly Charged Ions, International conference
01 Sep. 2014 - SPECTROSCOPY OF IONS RELEVANT TO PLASMA LIGHT SOURCES WITH AN ELECTRON BEAM ION TRAP
Tatsuhiko Kanehara; Shimon Kishira; Hayato Ohashi; Nobuyuki Nakamura
Poster presentation, English, 17th International Conferences on the Physics of Highly Charged Ions, International conference
01 Sep. 2014 - INTENSITY RATIO OF EUV EMISSION LINES IN FE XV STUDIED WITH A COMPACT ELECTRON BEAM ION TRAP
Erina Shimizu; Hiroyuki A. Sakaue; Daiji Kato; Izumi Murakami; Norimasa Yamamoto; Hirohisa Hara; Tetsuya Watanabe; Nobuyuki Nakamura
Poster presentation, English, 17th International Conferences on the Physics of Highly Charged Ions, International conference
01 Sep. 2014 - Development of a Kingdon ion trap for studying the forbidden X-ray transitions of excited highly charged ions
N.Numadate; K.Okada; N.Nakamura; H.Tanuma
Poster presentation, English, 17th International Conferences on the Physics of Highly Charged Ions, International conference
01 Sep. 2014 - Lost resonance lines in promethiumlike heavy ions
NAKAMURA Nobuyuki; KOBAYASHI Yusuke; KATO Daiji; SAKAUE Hiroyuki A; MURAKAMI Izumi
Oral presentation, English, The 5th China-Japan-Korea Joint Seminar on Atomic and Molecular Processes in Plasma (AMPP2014), International conference
31 Jul. 2014 - Recent results with the Tokyo EBIT and CoBIT
Nobuyuki Nakamura
Invited oral presentation, English, The 12th International Symposium on Electron Beam Ion Sources and Traps, Invited, East Lansing, MI, USA, http://meetings.nscl.msu.edu/EBIST14/ebist_home.html, International conference
20 May 2014 - Recent results from the Tokyo-EBIT and CoBIT
NAKAMURA Nobuyuki
Invited oral presentation, English, PEARL2014, International conference
02 May 2014 - LHDでのタングステン多価イオンM1遷移の観測と電離／再結合係数データ評価II
加藤太治; 坂上裕之; 後藤基志; 森田繁; 村上泉; 鈴木千尋; 田村直樹; 須藤滋; 中村信行; 小池文博; Ding Xiaobin; 佐々木明
Oral presentation, Japanese, 日本物理学会 第69回年次大会
30 Mar. 2014 - 太陽風起源禁制X遷移の実験室観測を目的とした多価イオントラップの開発III
沼舘直樹; 岡田邦宏; 中村信行; 田沼肇
Oral presentation, Japanese, 日本物理学会 第69回年次大会
29 Mar. 2014 - プラズマ光源関連イオンのEBITによる分光測定
金原達彦; 岸良子文; 大橋隼人; 中村信行
Oral presentation, Japanese, 日本物理学会 第69回年次大会
29 Mar. 2014 - LHDプラズマ中タングステン可視域禁制線の高波長分解偏光分離分光計測
藤井恵介; 加藤大治; 中村信行; 坂上裕之; 中井悠太; 篠原正季; 高橋佑理子; 後藤基志; 森田繁; 蓮尾昌裕
Oral presentation, Japanese, 日本物理学会 第69回年次大会
29 Mar. 2014 - Potential of an electron beam ion trap (EBIT) at SLOWRI
NAKAMURA Nobuyuki
Oral presentation, Japanese, Domestic conference
03 Mar. 2014 - Raman spectroscopy of graphitesurface irradiated with Biq+ ions
S. Das; A. Osawa; H. Ohashi; N. Nakamura
Poster presentation, English, 3rd International Conference on Physics at Surfaces and Interfaces (PSI-2014), International conference
Feb. 2014 - 硬X線用偏光計の開発Ⅱ
大澤 央; 石黒雄介; 中村信行
Oral presentation, Japanese, 原子衝突学会第38回年会,原子衝突学会第38回年会
Nov. 2013 - 太陽風起源禁制X遷移の実験室観測を目的とした多価イオントラップの開発
沼館直樹; 岡田邦宏; 中村信行; 田沼 肇
Oral presentation, Japanese, 原子衝突学会第38回年会,原子衝突学会第38回年会
Nov. 2013 - プラズマ光源関連イオンのEBITによる分光測定
金原達彦; 岸良子文; 大橋隼人; 東口武史; 中村信行
Oral presentation, Japanese, 原子衝突学会第38回年会,原子衝突学会第38回年会
Nov. 2013 - Pm様多価イオンのEUV分光計測Ⅱ
小林優介; 坂上裕之; 加藤太治; 村上 泉; 中村信行
Oral presentation, Japanese, 原子衝突学会第38回年会,原子衝突学会第38回年会
Nov. 2013 - 極端紫外領域における多価イオンの電荷交換分光
相田裕也; 島谷宏文; 大橋隼人; 中村信行; 岡田邦宏; 田沼 肇
Oral presentation, Japanese, 原子衝突学会第38回年会,原子衝突学会第38回年会
Nov. 2013 - 鉄多価イオンのEUV分光測定
清水恵理奈; 中村信行
Oral presentation, Japanese, 原子衝突学会第38回年会,原子衝突学会第38回年会
Nov. 2013 - 鉄多価イオン（Fe XV）のEUV発光線強度比の電子エネルギー依存性
坂上裕之; 中村信行; 山本則正; 加藤太治; 村上泉; 渡邊鉄哉
Oral presentation, Japanese, 日本物理学会2013年秋季大会,日本物理学会2013年秋季大会
Sep. 2013 - 小型電子ビームイオントラップを用いたタングステン多価イオンのEUV分光計測II
小林優介; 大橋隼人; 坂上裕之; 加藤太治; 村上泉; 中村信行
Oral presentation, Japanese, 日本物理学会2013年秋季大会,日本物理学会2013年秋季大会
Sep. 2013 - 太陽風起源禁制X線遷移の実験室観測を目的とした多価イオントラップの開発II
沼舘直樹; 岡田邦宏; 中村信行; 田沼肇
Oral presentation, Japanese, 日本物理学会2013年秋季大会,日本物理学会2013年秋季大会
Sep. 2013 - MCDF calculation and analysis of M1 lines from tungsten ions in LHD and EBIT plasmas
Fumihiro Koike; Izumi Murakami; Daiji Kato; XiaoBing Ding; Nobuyuki Nakamura; Chihiro Suzuki; Hiroyuki A. Sakaue
Poster presentation, English, XXVII International Conference on Photonic, Electronic and Atomic Collisions (ICPEAC2013), International conference
24 Jul. 2013 - Breit Interaction effect on the angular distribution and the polarization of X-ray emission in dielectronic recombination
Nobuyuki Nakamura
Invited oral presentation, English, XXVIII International Conference on Photonic, Electronic and Atomic Collisions (ICPEAC2013), Lanzhou, China, International conference
Jul. 2013 - Spectroscopic study of bismuth ions with an electron beam ion trap
Hayato Ohashi; Hiroyuki A Sakaue; Nobuyuki Nakamura
Oral presentation, English, XXVII International Conference on Photonic, Electronic and Atomic Collisions (ICPEAC2013)
Jul. 2013 - Spectroscopy of highly charged tungsten ions with a compact electron beam ion trap
Hiroyuki A. Sakaue; Daiji Kato; Izumi Murakami; Nobuyuki Nakamura
Oral presentation, English, XXVII International Conference on Photonic, Electronic and Atomic Collisions (ICPEAC2013)
Jul. 2013 - EBIT spectroscopy of highly charged heavy ions relevant to hot plasmas
Nobuyuki Nakamura
Invited oral presentation, English, The Division of Atomic, Molecular and Optical Physics (DAMOP) Meeting, APS, Quebec City, Canada, International conference
Jun. 2013 - LHDでのタングステン多価イオンM1遷移の観測と電離／再結合係数データ評価
加藤太治; 坂上裕之; 後藤基志; 森田繁; 村上泉; 鈴木千尋; 田村直樹; 須藤滋; 中村信行; 渡邉裕文; 小池文博; Ding Xiaobin
Oral presentation, Japanese, 日本物理学会,第68回年次大会
Mar. 2013 - 太陽風起源禁制X遷移の実験室観測を目的とした多価イオントラップの開発
沼館直樹; 岡田邦宏; 中村信行; 田沼肇
Oral presentation, Japanese, 日本物理学会,第68回年次大会
Mar. 2013 - 電荷交換分光実験のための極端紫外分光器の開発
相田裕也; 大橋隼人; 岡田邦宏; 田沼肇B; 中村信行
Oral presentation, Japanese, 日本物理学会,第68回年次大会
Mar. 2013 - EBITを用いた多価BiイオンのEUV分光
大橋隼人; 坂上裕之; 中村信行
Oral presentation, Japanese, 日本物理学会,第68回年次大会
Mar. 2013 - 小型EBITを用いたタングステン多価イオンのEUV分光計測
坂上裕之; 中村信行; 山本則正; 加藤太治; 村上泉
Oral presentation, Japanese, 日本物理学会,第68回年次大会
Mar. 2013 - EBIT spectroscopy of highly charged heavy ions relevant to hot plasmas
Nobuyuki Nakamura; Xiao-Bin Ding; Chen-Zhong Dong; Hirohisa Hara; Daiji Kato; Fumihiro Koike; Izumi Murakami; Tomohide Nakano; Hayato Ohashi; Hiroyuki A. Sakaue; Hirofumi Watanabeg; Tetsuya Watanabe; Norimasa Yamamoto
Invited oral presentation, English, Eighth International Conference on Atomic and Molecular Data and Their Applications (ICAMDATA2012), Gaithersburg, MD, USA, International conference
Oct. 2012 - The Tokyo-EBIT
Nobuyuki Nakamura
Invited oral presentation, English, HIE-EBIS workshop, Geneva, Switzerland, International conference
Oct. 2012 - SPM observation of surfaces irradiated by very highly charged ions
Susanta DAS; Takahiro Kudo; Hayato Ohashi; Nobuyuki Nakamura
Oral presentation, English, Joint Symposium on Collisions of Highly-Charged Ions with Molecules and Related Topics
Oct. 2012 - ANGULAR DISTRIBUTION OF X-RAY EMISSION IN DIELECTRONIC RECOMBINATION
Z. Hu; X. Han; Y. Li; D. Kato; X. Tong; H. Watanane; N. Nakamura
Invited oral presentation, English, 16th International Conferences on the Physics of Highly Charged Ions (HCI2012), Heidelberg, Germany, International conference
Sep. 2012 - EBITを用いた多価GdイオンのEUV分光
大橋隼人; 坂上裕之; 中村信行
Oral presentation, Japanese, 日本物理学会2012年秋季大会,日本物理学会2012年秋季大会
Sep. 2012 - タングステン多価イオンの可視光分光IV
簑島真希; 左古田淳平; 小松明浩; 中村信行; 坂上裕之; Xiaobin Ding; 加藤太治; 村上泉; 小池文博
Oral presentation, Japanese, 日本物理学会2012年秋季大会,日本物理学会2012年秋季大会
Sep. 2012 - 小型電子ビームイオントラップからの多価イオン引き出し実験
谷中佑樹; 八釼純治; 中村信行
Oral presentation, Japanese, 日本物理学会2012年秋季大会,日本物理学会2012年秋季大会
Sep. 2012 - 硬X線用偏光計の開発
石黒雄介; 大橋隼人; 中村信行
Oral presentation, Japanese, 日本物理学会2012年秋季大会,日本物理学会2012年秋季大会
Sep. 2012 - Dielectronic Recombination of Highly Charged Heavy Ions Studied with the Tokyo Electron Beam Ion Trap
Zhimin Hu; Xiaoying Han; Yueming Li; Daiji Kato; Xiaomin Tong; Nobuyuki Nakamura
Invited oral presentation, English, The 4th China-Japan Joint Seminar on Atomic and Molecular Processes in Plasma (AMPP2012), Lanzhou, China, International conference
Jul. 2012 - タングステン多価イオンの可視分光測定Ⅲ
簑島真希; 左古田淳平; 中村信行; Xiaobin Ding; 坂上裕之; 加藤太治; 村上泉; 小池文博
Oral presentation, Japanese, 原子衝突研究協会年会,原子衝突研究協会年会
Jul. 2012 - 電子ビームイオントラップを用いた多価Gdイオンの極端紫外分光
大橋隼人; 坂上裕之; 中村信行
Oral presentation, Japanese, 原子衝突研究協会年会,原子衝突研究協会年会
Jul. 2012 - 禁制遷移観測のための極端紫外分光器の製作及び評価
相田裕也; 大橋隼人; 中村信行; 岡田邦宏; 田沼肇
Oral presentation, Japanese, 原子衝突研究協会年会,原子衝突研究協会年会
Jul. 2012 - 硬X線用偏光計の開発
石黒雄介; 大橋隼人; 中村信行
Oral presentation, Japanese, 原子衝突研究協会年会,原子衝突研究協会年会
Jul. 2012 - 小型イオン源からの多価イオン引き出し実験Ⅱ
谷中佑樹; 八釼純治; 大橋隼人; 中村信行
Oral presentation, Japanese, 原子衝突研究協会年会,原子衝突研究協会年会
Jul. 2012 - 高価数イオンによる固体表面上ナノ衝突痕の走査型トンネル顕微鏡を用いた観測
工藤孝弘; 縄田祐治; Susanta Das; 中村信行
Oral presentation, Japanese, 原子衝突研究協会年会,原子衝突研究協会年会
Jul. 2012 - スピン偏極検出器較正のためのスピン偏極電子線源の開発
大澤 央; 山田千樫; 中村信行
Oral presentation, Japanese, 原子衝突研究協会年会,原子衝突研究協会年会
Jul. 2012 - EBITにおける高Z多価イオンの生成と分光
中村信行
Oral presentation, Japanese, 日本物理学会,日本物理学会第67回年次大会
Mar. 2012 - タングステン多価イオンの可視光分光III
左古田淳平; 簑島真希; 小松明浩; 中村信行; 坂上裕之; Xiaobin Ding; 加藤太治; 村上泉; 小池文博
Oral presentation, Japanese, 日本物理学会,日本物理学会第67回年次大会
Mar. 2012 - Angular Distribution of X-ray Emission in Dielectronic Recombination
Zhimin Hu; Xiaoying Han; Yueming Li; Daiji Kato; Xiaomin Tong; Nobuyuki Nakamura
Oral presentation, Japanese, 日本物理学会
Mar. 2012 - 多価イオンと電子の衝突過程－物理学的興味とデータニーズ－
中村信行
Oral presentation, Japanese, 原子衝突研究協会年会,原子衝突研究協会第36回年会
Aug. 2011 - Tokyo-EBITを用いた多価イオンのEUV分光
八釼純治; 大橋隼人; 坂上裕之; 中村信行
Oral presentation, Japanese, 原子衝突研究協会年会,原子衝突研究協会第36回年会
Aug. 2011 - 重元素多価イオンの二電子性再結合：偏極度におけるブライト相互作用の検証に向けて
胡智民; 中村信行
Oral presentation, Japanese, 原子衝突研究協会年会,原子衝突研究協会第36回年会
Aug. 2011 - タングステン多価イオンの可視分光測定２
左古田淳平; 小松明浩; 中村信行; 坂上裕之; Xiaobin Ding; 加藤太治; 村上泉; 小池文博
Oral presentation, Japanese, 原子衝突研究協会年会,原子衝突研究協会第36回年会
Aug. 2011 - 小型イオン源からの多価イオン引き出し実験
谷中佑樹; 八釼純治; 中村信行
Oral presentation, Japanese, 原子衝突研究協会年会,原子衝突研究協会第36回年会
Aug. 2011 - Tokyo-EBIT を用いた多価イオン－表面衝突実験
縄田祐治; 工藤孝弘; 山崎詔; 大橋隼人; 戸名正英; 大谷俊介; 山田千樫; 中村信行
Oral presentation, Japanese, 原子衝突研究協会年会,原子衝突研究協会第36回年会
Aug. 2011 - KLL dielectronic recombination resonance strengths in He- to O-like gold ions
Zhimin Hu; Michiharu Ureshino; Xiaoying Han; Yueming Li; Nobuyuki Nakamura
Oral presentation, English, XXVII International Conference on Photonic, Electronic and Atomic Collisions
Jul. 2011 - Dielectronic recombination of hydrogen-like krypton
Zhimin Hu; Akira Yamazaki; Yueming Li; Nobuyuki Nakamura
Oral presentation, English, XXVII International Conference on Photonic, Electronic and Atomic Collisions
Jul. 2011 - Electron energy dependence of extreme ultraviolet spectra from highly charged tungsten ions in an electron beam ion trap
H. Ohashi; J. Yatsurugi; N. Nakamura; H. A. Sakaue; T. Nakano
Oral presentation, English, XXVII International Conference on Photonic, Electronic and Atomic Collisions
Jul. 2011 - Spectra of highly charged Fe ions excited by electron collisions: Dependence on electron energy and density
SAKAUE Hiroyuki A; KATO Daiji; MURAKAMI Izumi; HARA Hirohisa; WATANABE Tetsuya; YAMAMOTO Norimasa; OHASHI Hayato; NAKAMURA Nobuyuki
Oral presentation, English, XXVII International Conference on Photonic, Electronic and Atomic Collisions
Jul. 2011 - 小型EBITを用いた鉄多価イオンEUV分光実験IV
坂上裕之; 中村信行; 山本則正; 加藤太治; 村上泉; 渡邊鉄哉
Oral presentation, Japanese, 日本物理学会,第66回年次大会
Mar. 2011 - EBITにおける高Z多価イオンの生成と分光
中村信行
Oral presentation, Japanese, 日本物理学会,第66回年次大会
Mar. 2011 - EBITを用いた多価Wイオンの発光強度比によるイオン密度比評価
大橋隼人; 八釼純治; 中村信行; 坂上裕之; 仲野友英
Oral presentation, Japanese, 日本物理学会,第66回年次大会
Mar. 2011 - 電子ビームイオントラップ(EBIT)を用いたタングステン多価イオンの分光計測
坂上裕之; 中村信行; 小松明浩; 左古田淳平; 小池文博; X.B.Ding; 加藤太治; 村上泉
Oral presentation, Japanese, プラズマ核融合学会,第27回年会
Nov. 2010 - Two-photon observations of dielectronic recombination processes
胡智民; 李月明; 山崎詔; 中村信行
Oral presentation, English, 日本物理学会,2010年秋季大会
Sep. 2010 - タングステン多価イオンの可視光分光II
小松明浩; 渡辺越至; 佐古田淳平; 中村信行; 渡辺裕文; 加藤太治; 村上泉; 坂上裕之; 山本則正
Oral presentation, Japanese, 日本物理学会,2010年秋季大会
Sep. 2010 - EUV EMISSION SPECTRA OF IRON IONS FOLLOWING CHARGE EXCHANGE COLLISIONS WITH HE
H. Ohashi; S. Suda; H. Tanuma; S. Fujioka; H. Nishimura; K. Nishihara; H. A. Sakaue; N. Nakamura; S. Ohtani
Oral presentation, English, 15th International Conference on the Physics of Highly Charged Ions
Sep. 2010 - Visible spectroscopy of Rh-like ions (poster)
Junpei SAKODA; Akihiro KOMATSU; Hiroyuki KIKUCHI; Nobuyuki NAKAMUR
Oral presentation, English, 15th International Conference on the Physics of Highly Charged Ions
Aug. 2010 - VISIBLE SPECTROSCOPY OF HIGHLY CHARGED TUNGSTEN IONS (poster)
A.Komatsu; J.Sakoda; N.Nakamura; H.A.Sakaue; Xiaobin Ding; D.Kato; I.Murakami; F.Koike
Oral presentation, English, 15th International Conference on the Physics of Highly Charged Ions
Aug. 2010 - TWO-PHOTON OBSERVATIONS OF DIELECTRONIC RECOMBINATION PROCESSES
HU Zhi-min; LI Yue-ming; YAMAZAKI Akira; NAKAMURA Nobuyuki
Oral presentation, English, 15th International Conference on the Physics of Highly Charged Ions
Aug. 2010 - Interaction of very highly charged ions with surfaces
Nobuyuki NAKAMURA; Yuji NAWATA; Nobu OHKI; Akira YAMAZAKI; Hayato OHASHI; Chikashi YAMADA; Shunsuke OHTANI; Masahide TONA; Makoto SAKURAI
Invited oral presentation, English, 21st International Conference on the Application of Accelerators in Research and Industry, Fort Worth, International conference
Aug. 2010 - STM observation of HOPG surfaces irradiated with very highly charged ions (poster)
NAWATA Yuji; OHKI Nobu; YAMAZAKI Akira; OHASHI Hayato; NAKAMURA Nobuyuki; YAMADA Chikashi; OHTANI Shunsuke; TONA Masahide; SAKURAI Makoto
Oral presentation, English, 15th International Conference on the Physics of Highly Charged Ions
Aug. 2010 - VISIBLE LIGHT EMISSION FROM SOLID SURFACES IRRADIATED WITH HIGHLY CHARGED IONS (poster)
YAMAZAKI Akira; NAWATA Yuji; NAKAMURA Nobuyuki; TONA Masahide; YAMADA Chikashi; OHTANI Shunsuke
Oral presentation, English, 15th International Conference on the Physics of Highly Charged Ions
Aug. 2010 - Progress at the Tokyo EBIT
NAKAMURA Nobuyuki
Invited oral presentation, English, International Symposium on Electron Beam Ion Sources and Traps (EBIST2010), Stockholm, Sweden, International conference
Apr. 2010 - Structure and dynamics of highly charged heavy ions studied with the electron beam ion trap in Tokyo
Nobuyuki NAKAMURA
Invited oral presentation, English, Fifth conference on trapped charged particles and fundamental physics (TCP2010), Saariselkä, Finland, International conference
Apr. 2010 - 多価イオン照射による固体表面発光
山崎詔; 縄田祐治; 中村信行; 山田千樫; 大谷俊介
Oral presentation, Japanese, 日本物理学会,第65回年次大会
Mar. 2010 - 小型EBITを用いた鉄多価イオンEUV分光実験III
渡辺越至; 八釼純治; 中村信行; 坂上裕之; 山本則正; 加藤太治; 村上泉; 渡邊鉄哉
Oral presentation, Japanese, 日本物理学会,第65回年次大会
Mar. 2010 - タングステン多価イオンの可視光分光
小松明浩; 渡辺越至; 佐古田淳平; 中村信行; 渡辺裕文; 加藤太治; 村上泉; 坂上裕之; 山本則正
Oral presentation, Japanese, 日本物理学会,第65回年次大会
Mar. 2010 - Dielectronic recombination of hydrogen-like krypton
胡智民; 李月明; 中村信行
Oral presentation, English, 日本物理学会,第65回年次大会
Mar. 2010 - EBITによるタングステン多価イオンの分光測定
坂上裕之; 中村信行; 渡辺越至; 渡辺裕文; 山本則正; 加藤太治; 村上泉
Oral presentation, Japanese, 日本物理学会,2009年秋季大会
Sep. 2009 - 小型EBITを用いた鉄多価イオンEUV分光実験II.密度依存測定
渡辺越至; 中村信行; 坂上裕之; 山本則正; 加藤太治; 村上泉; 渡邊鉄哉
Oral presentation, Japanese, 日本物理学会,2009年秋季大会
Sep. 2009 - Interference between radiative and dielectronic recombinations of highly charged ions observed through the ion abundance in an electron beam ion trap (poster)
Nobuyuki Nakamura; Anthony P Kavanagh; Hirofumi Watanabe; Hiroyuki A Sakaue; Yueming Li; Daiji Kato; Fred J Currell; Xiao-Ming Tong; Tsutomu Watanabe; Shunsuke Ohtani
Oral presentation, English, International Conference on Photonic Electronic and Atomic Collisions (ICPEAC2009)
Jul. 2009 - Spectra of ions with moderate charge states produced and excited in a compact electron beam ion trap (poster)
Nobuyuki Nakamura; Etsushi Watanabe; Hiroyuki A Sakaue; Daiji Kato; Izumi Murakami; Norimasa Yamamoto; Tetsuya Watanabe
Oral presentation, English, International Conference on Photonic Electronic and Atomic Collisions (ICPEAC2009)
Jul. 2009 - Recent activities at the Tokyo-EBIT 2009
Nobuyuki Nakamura; Fred J. Currell; Daiji Kato; Yueming Li; Izumi Murakami; Shunsuke Ohtani; Hiroyuki A Sakaue; Masahide Tona; Xiao-Ming Tong; Hirofumi Watanabe; Tetsuya Watanabe; Tsutomu Watanabe; Chikashi Yamada; Norimasa Yamamoto
Invited oral presentation, English, 3rd workshop on Physics at EBITS and Advanced Research Light Sources (PEARL2009), Dublin, Ireland, International conference
May 2009 - Collision Processes of Highly Charged Ions with Electrons Studied with an Electron Beam Ion Trap
Nobuyuki Nakamura; Anthony P. Kavanagh; Hirofumi Watanabe; Hiroyuki A. Sakaue; Yueming Li; Daiji Kato; Fred J. Currell; Xiao-Ming Tong; Tsutomu Watanabe; Shunsuke Ohtani
Invited oral presentation, English, 16th International Conference on Atomic Processes in Plasmas, Monterey, USA, International conference
Mar. 2009 - 小型電子ビームイオントラップによるSn，Xe多価イオンのEUV分光測定
渡辺越至; 中村信行; 坂上裕之
Oral presentation, Japanese, 日本物理学会,第64回年次大会
Mar. 2009 - 鉄イオンEUVスペクトル線を用いたプラズマの密度診断
山本則正; 加藤隆子; 加藤太治; 坂上裕之; 鈴木千尋; 佐藤国憲; 舟場芳久; 田村直樹; 渡辺越至; 中村信行; 渡邊鉄哉
Oral presentation, Japanese, 日本物理学会,第64回年次大会
Mar. 2009 - 小型電子ビームイオントラップを用いたFe多価イオンEUV分光実験
坂上裕之; 渡辺越至; 中村信行; 山本則正; 加藤太治; 村上泉; 渡邊鉄哉
Oral presentation, Japanese, 日本物理学会,第64回年次大会
Mar. 2009 - 重元素多価イオンの二電子性再結合に現れるBreit相互作用の観測
中村信行; Anthony P. Kavanagh; 渡辺裕文; 坂上裕之; 李月明; 加藤太治; Fred J. Currell; 大谷俊介
Oral presentation, Japanese, 日本物理学会,第63回年次大会
Mar. 2008 - 太陽/実験室プラズマの鉄イオンスペクトル線の解析と原子データ
山本則正; 加藤隆子; 佐藤国憲; 舟場芳久; 田村直樹; 加藤太治; 坂上裕之; 中村信行; P. Beiersdofer; J.K. Lepson; 西村博明; 渡邊鉄哉
Oral presentation, Japanese, 日本物理学会,第63回年次大会
Mar. 2008 - x-ray emission yields dependent on the target materials(II)
孫建; 渡辺裕文; 戸名正英; 吉安信雄; 中村信行; 櫻井誠; 山田千樫; 大谷俊介
Oral presentation, English, 日本物理学会,第63回年次大会
Mar. 2008 - 小型EBITを用いた多価イオンの可視光分光
菊池浩行; 中村信行; 坂上裕之; 渡邊鉄哉
Oral presentation, Japanese, 日本物理学会,第63回年次大会
Mar. 2008 - Resonant Processes in Electron-Highly Charged Ion Collisions Observed with The Tokyo Electron Beam Ion Trap
Nobuyuki NAKAMURA; A. P. Kavanagh; H. Watanabe; H. A. Sakaue; Y. Li; D. Kato; F. J. Currell; S. Ohtani
Invited oral presentation, English, Japan-China Joint Seminar on Atomic and Molecular Prcesses in Plasma, International conference
Oct. 2007 - RECENT ACTIVITIES AT THE TOKYO-EBIT 2007
Nobuyuki Nakamura; Hiroyuki Kikuchi; Tomohiro Kobayashi; Ryo Nakayama; Shunsuke Ohtani; Hiroyuki A. Sakaue; Makoto Sakurai; Takahiro Shimazaki; Jian Sun; Masahide Tona; Hirofumi Watanabe; Chikashi Yamada; Nobuo Yoshiyasu
Invited oral presentation, English, X International Symposium on the Physics and Applications of Electron Beam Ion Sources and Traps (EBIS/T 2007), Heidelberg, Germany, International conference
Aug. 2007 - Relativistic effects on resonant interactions between electrons and highly charged ions
Nobuyuki NAKAMURA; Anthony P. KAVANAGH; Hirofumi WATANABE; Hiroyuki A. SAKAUE; Yueming LI; Daiji KATO; Fred J. CURRELL; Shunsuke OHTANI
Invited oral presentation, English, XXV INTERNATIONAL CONFERENCE ON PHOTONIC, ELECTRONIC AND ATOMIC COLLISIONS, Freiburg, Germany, International conference
Jul. 2007 - X-ray emission hollow atoms produced in interaction of slow highly charged ions with different target materials
J. Sun; S. Takahashi; H. Watanabe; M. Tona; T. Watanabe; N. Nakamura; C. Yamada; S. Ohtani
Oral presentation, English, International Conference on Photonic Electronic and Atomic Collisions (ICPEAC2007)
Jul. 2007 - Resonant Processes in Collisions of Highly Charged Ions with Electrons
NAKAMURA Nobuyuki; Watanabe Hirofumi; Anthony P. Kavanagh; Sakaue Hiroyuki; Li Yueming; Kato Daiji; Fred J. Currell; Ohtani Shunsuke
Invited oral presentation, English, 7th Asian International Seminar on Atomic and Molecular Physics, India, International conference
Dec. 2006 - Recent activity at the Tokyo EBIT
Nobuyuki Nakamura
Invited oral presentation, English, 20 Years of Spectroscopy with the Electron Beam Ion Trap, Berkeley, USA, International conference
Dec. 2006 - Resonant electron processes with open-shell highly charged ion targets
N Nakamura; H Tobiyama; H Nohara; A P Kavanagh; H Watanabe; H A Sakaue; Y Li; D Kato; F J Currell; S Ohtani
Oral presentation, English, 13th International Conference on the Physics of Highly Charged Ions
Aug. 2006 - Observation of HCI-induced nanostructures with scanning probe microscope
M Tona; H Watanabe; S Takahashi; N Nakamura; N Yoshiyasu; C Yamada; M Sakurai; S Ohtani
Oral presentation, English, 13th International Conference on the Physics of Highly Charged Ions
Aug. 2006 - Interference between dielectronic and radiative recombination in electron-highly charged Bi collisions (poster)
H Tobiyama; H Nohara; A P Kavanagh; N Nakamura; H Watanabe; H A Sakaue; Y Li; D Kato; F J Currell; C Yamada; S Ohtani
Oral presentation, English, 13th International Conference on the Physics of Highly Charged Ions
Aug. 2006 - X-ray emission in slow highly charged ion-surface collisions (poster)
H Watanabe; T Abe; Y Fujita; J Sun; S Takahashi; M Tona; N Yoshiyasu; N Nakamura; M Sakurai; C Yamada; S Ohtani
Oral presentation, English, 13th International Conference on the Physics of Highly Charged Ions
Aug. 2006 - SPM observation of slow highly charged ion induced nano-dots on highly oriented pyrolytic graphite (HOPG) (poster)
Y Mitsuda; B E O’Rourke; N Nakamura; Y Kanai; S Ohtani; Y Yamazaki
Oral presentation, English, 13th International Conference on the Physics of Highly Charged Ions
Aug. 2006 - Resonant interactions of highly charged ions with electrons studied with an electron beam ion trap (poster)
N. Nakamura; H. Tobiyama; H. Nohara; H. Watanabe; F. J. Currell; S. Ohtani
Oral presentation, English, International Conference on Photonic Electronic and Atomic Collisions (ICPEAC2007)
Jul. 2005 - EBIT (Electron Beam Ion Trap) potential for atomic data production
Nobuyuki Nakamura
Invited oral presentation, English, 4th International Conference on Atomic and Molecular Data and Their Applications (ICAMDATA), Toki, Japan, International conference
Oct. 2004 - 多価イオンによる表面改質：STM・AFMによる照射痕の観察
中村信行; 金井保之; 中井陽一; 小牧研一郎; 山崎泰規
Oral presentation, Japanese, 日本物理学会,2003年秋季大会
Sep. 2003 - Development of an EBIS with high-TC bulk superconductors for highly charged ion-surface collision experiments
Nobuyuki Nakamura; Atsumi Endo; Yasuyuki Kanai; Yoichi Nakai; Ken-ichiro Komaki; Yasunori Yamazaki
Oral presentation, English, XXIII International Conference on Photonic Electronic and Atomic Collisions
Jul. 2003 - 高温超伝導体を用いた多価イオン源の開発およびそれを用いた表面衝突実験の計画
中村信行; 遠藤厚身; 金井保之; 中井陽一; 小牧研一郎; 山崎泰規
Oral presentation, Japanese, 日本物理学会,第58回年次大会
Mar. 2003 - Summary of Tokyo EBIT project
Nobuyuki Nakamura
Invited oral presentation, English, 5th Asian International Seminar on Atomic and Molecular Physics, Nara, International conference
Oct. 2002 - X-ray spectroscopy of high-Z HCI with Tokyo EBIT
Nobuyuki Nakamura; Daiji Kato; Shunsuke Ohtani
Invited oral presentation, English, 11th International Conference on Highly Charged Ions, Caen, International conference
Sep. 2002 - Tokyo-EBITを用いた多価イオンのX線分光
中村信行
Invited oral presentation, Japanese, 第27回研究会, 原子衝突研究協会
Aug. 2002 - 高温超伝導体を用いた多価イオン源の開発及びそれを用いた衝突実験の計画
中村信行; 遠藤厚身; 金井保之; 中井陽一; 鳥居寛之; 小牧研一郎; 山崎泰規
Oral presentation, Japanese, 原子衝突研究協会,第27回研究会
Aug. 2002 - X-ray spectroscopy of neon-like heavy ions
Nobuyuki Nakamura; Daiji Kato; Shunsuke Ohtani
Invited oral presentation, English, 19th International Conference on X-ray and Inner-Shell Processes, Roma, International conference
Jun. 2002 - 水素様多価イオンの1sラムシフトの測定II.ライマン線波長の相対測定
中村信行; 中原哲郎; 大谷俊介
Oral presentation, Japanese, 日本物理学会,2001年秋季大会
Sep. 2001 - X-ray spectroscopic studies of relativistic and QED effects in highly charged ions
Nobuyuki Nakamura; Daiji Kato; Tetsuro Nakahara; Shunsuke Ohtani
Oral presentation, English, Spectroscopy in the 21st Century
Mar. 2001 - 多価イオンの電子衝撃励起における間接励起効果の観測
中村信行; 加藤太治; 中原哲郎; 大谷俊介
Oral presentation, Japanese, 日本物理学会,第56回年次大会
Mar. 2001 - X-ray spectroscopy of highly charged ions at the Tokyo EBIT
Nobuyuki Nakamura; Daiji Kato; Shunsuke Ohtani
Oral presentation, English, 4th Asian International Seminar on Atomic and Molecular Physics
Oct. 2000 - Construction and performance of the Tokyo-EBIT
Nobuyuki Nakamura
Oral presentation, English, Symposium on EBIT-based HCI physics
Sep. 2000 - Recent results at the Tokyo EBIT
Nobuyuki Nakamura; Chikashi Yamada; Shunsuke Ohtani
Oral presentation, English, 8th Asia Pacific Physics Conference
Aug. 2000 - Tokyo-EBITを用いた多価イオンの分光学的研究―最近の成果と研究計画―
中村信行; 大谷俊介; 岡崎清比古; 加藤太治; 山田千樫; 渡辺裕文; 電通大―JST―YEBISUグループ
Oral presentation, Japanese, 原子衝突研究協会,第25回研究会
Aug. 2000 - ネオン様多価イオンの高分解能X線分光測定III
中村信行; 加藤太治; 三浦望; 中原哲郎; 大谷俊介
Oral presentation, Japanese, 日本物理学会,2000年春の分科会
Mar. 2000 - 高分解能X線分光による多価イオンの電子衝撃励起過程の観測
中村信行; 加藤太治; 三浦望; 中原哲郎; 大谷俊介
Oral presentation, Japanese, 日本物理学会,2000年春の分科会
Mar. 2000 - Injection of various metallic elements into an electron beam ion trap: Techniques needed for systematic investigations of isoelectronic sequences
Nobuyuki Nakamura; Satoshi Itoh; Tohru Kinugawa; Shunsuke Ohtani; Kiyohiko Okazaki; Makoto Sakurai; Hiroshi Shimizu; Hirofumi Watanabe; Chikashi Yamada
Oral presentation, English, 8th International Conference on Ion Sources
Sep. 1999 - X-ray spectroscopy of highly charged neonlike ions at the Tokyo electron beam ion trap
Nobuyuki Nakamura; Daiji Kato; Shunsuke Ohtani
Oral presentation, English, Internationl Seminar on Atomic Processes in Plasmas
Jul. 1999 - ネオン様多価イオンの高分解能X線分光測定II
中村信行; 加藤太治; 大谷俊介
Oral presentation, Japanese, 日本物理学会,第54回年会
Mar. 1999 - Spectroscopic observation for electron impact excitations of highly charged Ne-like ions
Nobuyuki Nakamura; Daiji Kato; Shunsuke Ohtani
Oral presentation, English, 6th International Conference on X-Ray Lasers
Sep. 1998 - X-ray spectroscopy of highly charged Ne-like ions
Nobuyuki Nakamura; Daiji Kato; Eimitsu Nojikawa; Frederick J. Currell; Anatoly Ya. Faenov; Tatiana A. Pikuz; Shunsuke Ohtani
Oral presentation, English, IX International Conference on the Physics of Highly Charged Ions
Sep. 1998 - ネオン様多価イオンの高分解能X線分光測定
中村信行; 加藤太治; 清水宏; 野地川栄光; 山田千樫; 大谷俊介
Oral presentation, Japanese, 日本物理学会,第53回年会
Mar. 1998 - Present status of the Tokyo electron beam ion trap
Nobuyuki Nakamura; Junji Asada; Frederick J. Currell; Tsunemitsu Fukami; Takato Hirayama; Daiji Kato; Kenji Motohashi; Eimitsu Nojikawa; Shunsuke Ohtani; Kiyohiko Okazaki; Makoto Sakurai; Naoko Tada; Seiji Tsurubuchi; Hirofumi Watanabe
Oral presentation, English, 7th International Conference on Ion Sources
Sep. 1997 - Tokyo-EBITを用いた多価イオンの分光学的研究
中村信行; 浅田順之; Frederick J. Currell; 深見恒光; 平山孝人; 加藤太治; 本橋健次; 野地川栄光; 大谷俊介; 岡崎清比古; 桜井誠; 清水宏; 多田直子; 鶴淵誠二; 渡辺裕文
Oral presentation, Japanese, 原子衝突研究協会,第22回研究会
Aug. 1997 - 高エネルギー、高密度電子ビームイオン源
中村信行
Invited oral presentation, Japanese, 第52回年会, 日本物理学会
Mar. 1997 - An Overview of The Tokyo Electron Beam Ion Trap
Nobuyuki Nakamura; Junji Asada; Frederick J. Currell; Tsunemitsu Fukami; Takato Hirayama; Kenji Motohashi; Tetsuo Nagata; Eimitsu Nojikawa; Shunsuke Ohtani; Kiyohiko Okazaki; Makoto Sakurai; Hiroshi Shiraishi; Seiji Tsurubuchi; Hirofumi Watanabe
Oral presentation, English, XIII International Conference on the Physics of Highly Charged Ions
Sep. 1996 - 電通大多価イオン源の運転
中村信行; 大谷俊介; Frederick J. Currell; 渡辺裕文; 西沢一生; 浅田順之; 白石博司; 野地川栄光; 深見恒光; 桜井誠; 鶴淵誠二; 本橋健次; 岡崎清比古; 箕曲在道; 長田哲夫; 家村一彰; 平山孝人; 石井宏一
Oral presentation, Japanese, 日本物理学会,第51回年会
Mar. 1996 - 多価イオン―希ガス衝突における多電子移行過程断面積の測定
中村信行; Frederick J. Currell; 檀上篤徳; 木村正広; 松本淳; 大谷俊介; 坂上裕之; 桜井誠; 俵博之; 渡辺裕文; 山田一博; 吉野益弘
Oral presentation, Japanese, 日本物理学会,第50回年会
Mar. 1995 - Cross sections for multi-electron processes in 1.5q keV Iq+ + rare gas collisions (6
Oral presentation, English, XIX International Conference on The Physics of Electronic and Atomic Collisions
1995 - 多価イオンへの電子移行過程における生成イオンと反跳イオンの同時測定II
中村信行; 檀上篤徳; 伊藤陽; 木村正広; 松本淳; 大谷俊介; 桜井誠; 俵博之; 渡辺裕文; 山田一博; 吉野益弘
Oral presentation, Japanese, 日本物理学会,秋の分科会
Oct. 1993 - 多価イオンへの電子移行過程における生成イオンと反跳イオンの同時測定
中村信行; 桜井誠; 木村正広; 大谷俊介; 檀上篤徳; 吉野益弘; 松本淳; 俵博之; 山田一博
Oral presentation, Japanese, 日本物理学会,第48回年会
Mar. 1993 - Energy spectroscopy for electron capture processes of highly carged ions in coincidence with target ions
Nobuyuki Nakamura; Atsunori Danjo; Masahiro Kimura; Atsushi Matsumoto; Shunsuke Ohtani; Makoto Sakurai; Hiroyuki Tawara; Ichihiro Yamada; Masuhiro Yoshino
Oral presentation, English, XVIII International Conference on The Physics of Electronic and Atomic Collisions
1993 - N6++O2衝突により生成されるN4+**(1s3l3l’)の4重項状態からの放出電子スペクトル
中村信行; 根岸智夫; 金井保之; 大谷俊介; 北澤真一; 永田美知; 高柳俊暢; 脇谷一義; 鈴木洋; 神原正; 粟谷容子
Oral presentation, Japanese, 日本物理学会,秋の分科会
Sep. 1992
Research Themes
- Exploring microwave spectroscopy of highly charged ions
木村 直樹; 中村 信行; 岡田 邦宏
Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Institute of Physical and Chemical Research, Grant-in-Aid for Challenging Research (Pioneering), 23K17305
Jun. 2023 - Mar. 2027 - 原子物理と宇宙物理の連携で迫る多様な中性子星合体の元素合成
田中 雅臣
日本学術振興会, 科学研究費助成事業 基盤研究(A), 東北大学, 基盤研究(A), 23H00127
Apr. 2023 - Mar. 2027 - Elucidation of structures of complex quasi-continuous atomic spectra UTA by using high dispersion spectroscopy and statistical theories
村上 泉; 佐々木 明; 川手 朋子; 鈴木 千尋; 坂上 裕之; 中村 信行; 藤井 恵介
Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, National Institute for Fusion Science, Grant-in-Aid for Scientific Research (A), (1) 極端紫外（EUV）領域の高波長分解高分散分光器の設計を行い、制作を開始した。高分散の回折格子は、2300line/mm及び、4600line/mmのものを開発し、Sn 13nm 及び 5-8nmの領域の高分散分光観測が可能になるような光学系の設計を行った。 (2) レーザー生成プラズマからのUTAスペクトルの観測を行うための準備として、プラズマ生成に必要な実験システムの設計と構築を行った。ターゲットチャンバーと真空排気系の整備等を行い、実際のプラズマ生成が可能な段階に到達した。 (3) 核融合研の大型ヘリカル装置（LHD）を使ったプラズマ実験でタングステンや希土類をペレットで入射し、多様な電子温度や密度におけるEUV領域のスペクトルを取得した。また、電気通信大学の電子ビームイオントラップTokyo-EBITと既存のEUV分光器を用いて、タングステン多価イオンの5nm近傍のUTA構造に関する分光測定を行った。高次光を用いることによって、これまでよりも高分解能なスペクトルを取得することに成功した。 (4) 第一原理計算により、タングステン２２～２４価の原子構造、放射遷移確率などの原子データの計算と衝突輻射モデルを構築し、EUVスペクトルを計算した。 (5) これまで藤井らは、原子構造が完全にカオス的である原子の発光スペクトルの統計モデリングを行ってきた。これは電子-電子相互作用が強い極限を考えていることに相当する。2021年度はその逆の極限である、電子-電子相互作用が弱い極限での統計モデルについて検討を行った。EUV光源用Snイオンの原子モデルの物理シミュレーション及びデータ科学的な研究を行なった。Sn及び希土類などのプラズマからのEUVスペクトルの特性を、局所的な遮蔽水素近似で表す方法を提案し、実験スペクトルとの比較によってそれが妥当なことを確かめた。, 21H04460
Apr. 2021 - Mar. 2026 - 太陽風多価イオンのX線放射観測に対する地上実験からのメッセージ
田沼 肇; 坂上 裕之; 中村 信行; 飯田 進平
日本学術振興会, 科学研究費助成事業, 東京都立大学, 基盤研究(A), 太陽風に含まれている多価イオンと，太陽系の惑星間空間に最も多く存在している水素原子を，実際の太陽風と同じ400-800 km/sの速度で衝突させ，電荷交換反応によって生成する励起状態からの軟Ｘ線領域における発光スペクトルを測定することが本研究の目的である。多価イオンは電気通信大学に設置されている電子ビームイオントラップを用いて生成し，磁場によって狭い空間に閉じ込める準備が行われている。このイオンは100 eV以下の低エネルギーで運動しているので，平均すると空間に停止しているとみなすことができる。この多価イオンと水素原子を太陽風と同程度の速度で衝突させるために，高速中性水素原子ビームを準備するのが本研究の第1の課題である。そのために高強度水素原子イオンビームをマイクロ波放電型イオン源によって生成し，同時に生成する水素分子イオンを質量分析によって除外した後，原子イオンビームのみを希薄な気体を満たした容器に導入し，電荷移行反応によってイオンを中性化することで中性水素原子ビームを生成する。イオントラップは超高真空に保たれているので，中性化用の気体がイオントラップに入らないように差動排気が必要である。中性化に必要な気体圧力を検討した上で，二段の差動排気機構を備えた装置の設計を行い，部品の設計と製作を年度内に完了させた。また，Ｘ線スペクトルの観測に用いるシリコンドリフト型検出器を導入し，多価イオンと中性気体の衝突による発光スペクトルの測定を行った。以前に使用していた同種の検出器よりエネルギー分解能が高いことが確認され，今後の測定に大きな期待が持てる。, 19H00701
Apr. 2019 - Mar. 2024 - 先端的宇宙X線検出器で迫る多価重イオンの量子電磁力学
中村 信行
日本学術振興会, 科学研究費助成事業, 電気通信大学, 新学術領域研究(研究領域提案型), 本研究課題では、主にコンプトンカメラ偏光計を用いた共鳴再結合X線の偏光度測定を行っている。本研究で用いるコンプトンカメラ偏光計は、ひとみ衛星搭載用として宇宙研を中心に開発されたものであり、Si散乱体をCd/Te吸収体が囲む構造により、入射X線のコンプトン散乱事象をとらえる。Si、Cd/Teそれぞれ多層化、セグメント化されているため、散乱および吸収の起きた位置を3次元的にとらえることで、散乱角を検知することができる。散乱角は入射X線の偏光方向に依存するため、散乱角度分布から入射X線の偏光度を知ることができる。コンプトンカメラによる偏光度測定は、2年間実施された前公募研究において準備が完了し実験も開始していたが、検出器回転機構を備えた恒温槽を2021年度に導入した。これにより検出器の冷却温度を下げることで雑音を抑制することが可能となり、更に検出器を回転させることにより検出器の応答特性を詳細に評価することが可能となる。2021年度においては、その機構を検討した上で構成物品を導入した。 加えて、前公募研究において実施されて解析が進行中であったBiイオンの放射性再結合X線の偏光度測定の実験結果をまとめ、Physical Review A誌に投稿し、査読を経た後に掲載された。 また、原理的に無偏光であるはずのベリリウム様ビスマスの共鳴再結合X線の偏光度を測定したところ、極めて大きな偏光度を有するという結果がこれまでの測定において得られた。2021年度に理論解析を重ねた結果、それは異なる部分波同士の干渉効果によるものであることが分かってきた。その理論解析を協力研究者とともに行った。, 21H00164
Apr. 2021 - Mar. 2023 - 新しい精密重元素原子データで読み解く中性子星合体の元素合成
田中 雅臣; 田沼 肇; 中村 信行; 加藤 太治
日本学術振興会, 科学研究費助成事業, 東北大学, 基盤研究(A), 中性子星合体からの電磁波放射（キロノバ）の性質、特に合体から一日以内の初期放射の特性を理解するために、高階電離の重元素の網羅的な原子構造計算を行った。2017年に観測された中性子星合体イベントGW170817/AT2017gfoでは、最初の数日の放射では比較的軽い中性子捕獲元素（rプロセス元素）の存在が示唆されているため、rプロセス元素の中で比較的軽いバリウム（原子番号56）までを対象にし、四階電離から十階電離までのイオンの原子構造を網羅的に計算した。この結果を用いて、中性子星合体の放出物質におけるrプロセス元素の不透明度を計算し、合体から一日以内の物理状況に適用できる重元素の不透明度の現実的なデータを初めて提供した。さらに、この新しいデータを用いてキロノバの輻射輸送シミュレーションを行い、GW170817/AT2017gfoの合体から12時間後程度の観測データが、rプロセス元素の放射性崩壊によるキロノバで説明できることを明らかにした。 また、2019年度に行った理論計算による網羅的な原子データの精度を検証するため、ランタノイド元素の一つであるエルビウム（原子番号68）の分光実験に着手している。今年度は、レーザー誘起ブレークダウン分光実験装置のために新たな低分散分光器を導入し、幅広い波長領域のスペクトルを効率的に取得することが可能となった。この新しい分光器を用いて既にエルビウムの発光スペクトルを取得できており、ラインの同定と遷移確率の導出を進めている。, 19H00694
Apr. 2019 - Mar. 2023 - 彩層からコロナまでの広温度域太陽大気プラズマに実験室から迫る
中村 信行; 原 弘久; 村上 泉; 坂上 裕之; 山本 則正; 加藤 太治
日本学術振興会, 科学研究費助成事業, 電気通信大学, 基盤研究(A), 前半の2年間において観測に必要な分光器や検出器、測定器をほぼ揃えることができた。特に、Solar-C_EUVSTによる分光診断で重要となる真空紫外領域を観測するために立ち上げた真空紫外分光器を電気通信大学の小型電子ビームイオントラップ（CoBIT）に設置し、その性能評価を中心として、Ne多価イオンの発光線を観測した結果をJ. Phys. Soc. Jpnに投稿し、査読を経た後に掲載された。加えて今年度において、可視領域の分光をより効率的に行うために新たな分光器の導入を行い、その動作試験を行った。 また、より短い波長領域を観測する極端紫外領域の分光測定においては、太陽フレアなど特に活動的な領域の診断において有用となるAr XIV発光線の密度依存性を高磁場電子ビームイオントラップTokyo-EBITとCoBITを用いることで広い密度領域について実験的に決定し、モデル計算と比較・評価した。この成果については物理学会で発表した他、Astrophysical Journal誌に投稿し、査読を経た後に掲載された。 一方、以前からモデル計算と実験・観測との差異が指摘されているFe XV発光線強度比の密度依存性について、その差異の原因を調べるため実験と計算の双方から研究を進めた。実験では核融合科学研究所のCoBITで観測したエネルギー依存性について解析を進め論文化を進めた。理論的には、価数の低いイオンからの電離の寄与を詳細に取り入れた他、モデルに使用されている断面積の信頼性を慎重に評価した計算を行った。この成果については物理学会で発表し、論文化についても準備を進めている。, 19H00665
Apr. 2019 - Mar. 2023 - Non-equilibrium ion spectroscopy of tungsten highly charged ions for measurements of ionization cross sections
加藤 太治; 坂上 裕之; 中村 信行
Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, National Institute for Fusion Science, Grant-in-Aid for Scientific Research (B), 本研究の目的は、電子ビームイオントラップ（EBIT）装置を用いて多価イオンからの極端紫外域（EUV）発光スペクトルの時間分解分光により電離断面積を測定する手法を新規に開発することである。本測定法では、EBITの電子ビームエネルギーをパルス変調させることで、電離非平衡状態の高価数多価イオンを生成する。そして、多価イオンが平衡状態へと緩和する過程で発する極端紫外域の発光線スペクトルの時間変化から電離断面積を求める。 今年度は、前年度に引き続き、核融合科学研究所の小型EBIT（CoBIT）装置に設置されているEUV分光器の改修を進めた。具体的には、マイクロチャンネルプレートを用いた位置有感型EUV光検出システム、検出されたEUV光信号のマルチチャンネルアナライザの構築を行い、Pythonによるデータ解析用のソフトを作成した。このように、本研究の実施に必要な核融合科学研究所のCoBIT装置でのEUV発光分光測定システムの改修は概ね完了した。 また、本研究では測定された電離断面積と、相対論的歪曲波ボルン近似による理論計算とを比較することにより、電離断面積および電離速度係数データの定量的評価を行うことも目的としている。これに係わり、これまでに核融合科学研究所の大型ヘリカル装置（LHD）を用いて測定された、磁場閉じ込めプラズマ中でのタングステン多価イオンからの可視域発光線スペクトルを解析し、理論計算によって構築された電離・再結合断面積データの評価を行った。その結果、電離平衡モデルが成り立つ範囲では、電離・再結合断面積データが正しいことを示唆する結果が得られた。, 18H01201
Apr. 2018 - Mar. 2023 - 先端的宇宙X線検出器で迫る多価重イオンの量子電磁力学
中村 信行
日本学術振興会, 科学研究費助成事業, 電気通信大学, 新学術領域研究(研究領域提案型), 電通大の電子ビームイオントラップTokyo-EBITは、多価重イオンの生成・観測を可能とする有数の実験装置である。このTokyo-EBITに宇宙観測用先端的X線検出器の一つであるSi/CdTe半導体コンプトンカメラを設置し、多価重イオンから放出されるX線の直線偏光度測定を行った。 既に初年度において偏光度測定自体は実施可能となり、いくつかの結果も得ていたが、偏光度の絶対値および系統的不確かさの評価が課題であった。そのため、検出器の応答に関する詳細なシミュレーションを、実験で得られたエネルギースペクトルや散乱角度分布を十分な精度で再現するまで繰り返し行った。その評価のために、偏光度がほぼ100%である水素様および裸Krイオンへの放射性再結合X線の偏光度測定を行った。その結果、±0.02の精度で直線偏光度を決定することが可能であるとの結論に至った。この成果は新規装置に関する学術雑誌Rev.Sci.Instrum.に投稿した（2021年3月下旬投稿、5月上旬に"beautiful paper"とのコメントとともにminor revisionの査読結果）。 検出器の評価が済んだことにより、He様からF様Biイオンの放射性再結合X線の偏光度の決定を行った。その結果、理論計算と差異があることが分かった。これは電子相関の効果によるもので、実験を再現するためにはより詳細な理論計算が必要であることを示唆している。この成果に関しては2020年度中に投稿までは至らなかったが2021年5月中にPhys.Rev.誌に投稿予定である。 また、Be様Biに関して二電子性再結合X線の偏光度測定および解析を行ったところ、本来無偏光であるはずのX線が有意に偏光しているという結果を得た。これは原子物理の枠内では説明不可能であるが、実験および解析に問題は見当たらず、原子核スピンなどの影響などを詳細に考慮する必要がある。, 19H05187
Apr. 2019 - Mar. 2021 - Study on contrituion of dielectronic recombination proccess to emission structure of tungste ions in a plasma
Murakami Izumi
Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, National Institute for Fusion Science, Grant-in-Aid for Scientific Research (B), It is necessary to construct a collisional-radiative model for tungsten ions in order to examine behavior of tungsten impurities in fusion plasmas and the radiation power. We have constructed a collisional-radiative model with including recombination processes, which were not considered before for tungsten ions, and tried to reconstruct the extreme ultraviolet spectra of tungsten ions with the model calculations. The unresolved transition array, quasi-continuum spectral feature seen at 4-7nm was not well reproduced by including the recombination processes to the model. Some other atomic processes should be examined further. The spectral peaks seen at 2-4nm are not changed with their profiles by recombination processes and are useful to identify charge states in plasmas. We used these peaks to examine the behavior of tungsten ions in LHD plasmas., 16H04623
Apr. 2016 - Mar. 2021 - Population kinetics of long-lived metastable states in multiply charged ions
Nakamura Nobuyuki
Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, The University of Electro-Communications, Grant-in-Aid for Scientific Research (B), The mechanism of the “lost resonance lines” in promethiumlike ions, which have been three-decades-old question, has been clarified by studying time evolution of the population of a long-lived metastable state both experimentally and theoretically. Visible transitions in open-4f-shell multiply charged ions that are proposed to be used in a new type of atomic clock have been observed and identified. Spontaneous electric octupole transitions have been observed for the first time, and the emission mechanism has been clarified through population kinetics analysis., 16H04028
Apr. 2016 - Mar. 2019 - 太陽および天体プラズマに関連する多価イオンの分光研究
中村 信行; ALI SAFDAR
日本学術振興会, 科学研究費助成事業, 電気通信大学, 特別研究員奨励費, 本年度はまとめの年度として、これまで立ち上げた研究の継続を進めるとともに、得られたデータの解析を進め、論文としてまとめたり、会議で発表したりするなど、成果を形として公表することに重点を置く計画であった。まず、国際会議としては、当該分野で最も権威があり参加者も多い原子衝突国際会議（ICPEAC2017、7月にオーストラリアケアンズにて開催）において、硫黄多価イオンの分光測定に関する成果と、鉄多価イオンの共鳴励起に関する成果の2件をポスターにて発表した。硫黄、鉄、いずれも天体物理において重要な元素であり、その発光の性質を調べることは、太陽コロナなどの天体高温プラズマ診断において有用である。前者については、極端紫外領域（160-300オングストローム）におけるS VIII-XIIIイオンの2s-2p遷移を小型電子ビームイオントラップで観測し、同定を行ったものである。この成果については論文としても投稿すべく、現在執筆を進めている。後者については、Fe XVおよびFe XVIイオンの電子衝突による3d励起過程に現れる共鳴励起過程を、極端紫外域にある3p-3d遷移強度の電子ビームエネルギー依存せいから調べたものである。この成果については既に論文として執筆し、天文分野で最も権威ある雑誌Astrophysical Journalに論文を投稿し、既に掲載されている。また、我々と同様の装置により多価イオンの分光研究を行っている上海復旦大学を5月に訪問し（先方からの依頼）、電通大の研究成果を報告するとともに、先方の研究状況を把握し、研究のすみわけなどについて議論する他、情報交換を行った。その他、次世代の短波長リソグラフィ光源に資するランタノイド系多価イオンの発光線観測については本研究の成果が認められ、研究期間終了後の17年11月に受入研究者の中村が国際会議にて招待講演を行っている。, 15F15025
Oct. 2015 - Mar. 2018 - Modeling visible forbidden line emission of highly-charged tungsten ions and its application to fusion plasma measurements
KATO DAIJI; MURAKAMI Izumi; GOTO Motoshi; MORITA Shigeru; DING Xiaobin
Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, National Institute for Fusion Science, Grant-in-Aid for Scientific Research (B), Tungsten materials with excellent resistance to high heat load are used for plasma facing materials of International Thermonuclear Experimental Reactor (ITER). However, there is a concern about radiation collapse of core plasmas due to accumulation of sputtered tungsten particles into the core plasmas. Thus, understanding of tungsten transport characteristics in magnetic-confinement plasmas is an important issue. For the first time in the world, we have established a method for measurements of highly-charged tungsten ions in magnetic-confinement fusion plasmas using emission lines in the near-ultraviolet-visible region. As a result, the tungsten measurement of the core plasma, which had been performed in the soft X-ray region up to now, became possible in the long-wavelength region where neutron shielding of detectors is not required by the use of optical fibers., 15H04235
Apr. 2015 - Mar. 2018 - Observation of X-ray forbidden transition from solar wind in laboratory
TANUMA HAJIME; NAKAMURA Nobuyuki; OKADA Kunihiro; ISHISAKI Yoshitaka; OHASI Takaya; MITSUDA Kazuhisa; EZOE Yuichiro
Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Tokyo Metropolitan University, Grant-in-Aid for Scientific Research (A), After a single electron capture of hydrogen-like ions, a forbidden transition from a triplet state to the ground singlet state is expected. The direct observation of the forbidden line with a long life time is the final aim of this project. For this purpose, a Kindgon ion trap has been developed for the storage of the metastable ions. We have measured the total single electron capture cross sections in collisions of the multiply charged ions, which are produced with an electron cyclotron resonance ion source, with neutral gases. Also we have observed the resonance lines following the electron capture collisions of the multiply charges ions with a silicon drift detector and have measured the soft X-ray emission cross sections of the resonance lines. When the project ions are hydrogen-like ions, the difference between the total single electron capture cross sections and the X-ray emission cross sections must be the formation of the triplet state and we found it is dominant processes., 23244083
Apr. 2011 - Mar. 2015 - Approach based on atomic processes to study tungsten impurity behavior in plasma
MURAKAMI Izumi; KATO Daiji; GOTO Motoshi; SAKAUE Hiroyuki; SUZUKI Chihiro; NAKAMURA Nobuyuki; TANUMA Hajime; SASAKI Akira; KOIKE Fumihiro; NAKANO Tomohide; SAKAI Yasuhiro; MOTOHASHI Kenji; WATANABE Tetsuya; YAMAMOTO Norimasa; FUNABA Hisamichi
Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, National Institute for Fusion Science, Grant-in-Aid for Scientific Research (A), Tungsten is a candidate of plasma-facing material for ITER and future fusion reactors and we need to study tungsten behavior in plasmas by spectroscopy. We produced and validated basic atomic data of tungsten theoretically and experimentally, and constructed a tungsten spectroscopic model to reproduce tungsten spectra measured in LHD. We also measured momentum of excited tungsten atom sputtered from a tungsten target to examine ejecting processes of tungsten into plasma. These studies can extend to understand the tungsten behavior from production to transport in plasmas to find out a control method in plasmas., 23246165
Apr. 2011 - Mar. 2014 - Spectroscopy of highly charged ions with an electron beam ion trap
SAKAUE Hiroyuki; NAKAMURA Nobuyuki; KATO Daiji; YAMAMOTO Norimasa
Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, National Institute for Fusion Science, Grant-in-Aid for Scientific Research (B), In this study, using the EUV and visible spectrometer installed in Electron Beam Ion Traps (EIBT), we observed the emission spectra of highly charged ions. We succeeded in reproducing the EUV spectrum of tungsten impurity pellets LHD plasma by scanning the electron beam energy in the present device. Based on these results, we will proceed with the collection of basic data useful for nuclear fusion., 22340175
Apr. 2010 - Mar. 2014 - Studies of the generalized Breit interaction effect in autoionizing states
NAKAMURA Nobuyuki; YAMADA Chikashi; TONG Xiaomin; KATO Daiji
Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, The University of Electro-Communications, Grant-in-Aid for Scientific Research (B), Dielectronic recombination processes of few electron heavy highly charged ions have been studied with the Tokyo electron beam ion trap at the University of Electro-Communications. By combining two experiments, X-ray measurements and ion abundance measurements, the angular distribution of X-rays emitted in dielectronic recombination processes has been measured for lithiumlike ions. The dominant contribution of the Breit interaction effect on the angular distribution has been clearly demonstrated., 21340111
2009 - 2012 - Study of electron emission in the reaction of highly charged ions with solid surface
YAMADA Chikashi; NAKAMURA Nobuyuki
Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, The University of Electro-Communications, Grant-in-Aid for Scientific Research (B), It is well known that a highly charged ion, that is an atom deprived of many electrons, causes emission of many electrons in the reaction(collision) with solid surfaces. The number of emitted electrons exceeds well beyond the charge number of highly charged ions. In some cases, the electrons are spin-polarized, which means that the spin(associated as the direction of the axis of spinning top) is aligned in a certain direction. To investigate this phenomenon, we have already built a spin polarimeter. In this study we designed and constructed a separate polarized electron beam source for the purpose of calibrating the polarimeter., 21350008
2009 - 2011 - 多価イオン照射により磁性体表面から放出される2次電子のスピン分析
中村 信行
日本学術振興会, 科学研究費助成事業, 電気通信大学, 若手研究(B), 今年度は、まず磁性体表面の清浄化を行うための真空系の整備を行った。昨年度立ち上げた衝突実験槽の真空度は5xlO^<-8>torr程度であったが、モット型検出器の差動排気の強化、ターボ分子ポンプのタンデム化、真空槽焼き出しの強化、などを行うことにより、真空度をlO^<-10>torr台の超高真空を達成した。その上で、磁性体表面をアニールするためのタングステンリボンを超高真空内に設置し、磁性体表面を600℃まで加熱できるように装置を改造した。更に、イオン銃を取り付け、アニールとイオン照射によるスパッタクリーニングを繰り返すことにより、磁性体表面の清浄化を行った。 次に、昨年度製作したモット型スピン分析器の性能評価から行った。表面を清浄化し、磁化させたニッケルにアルゴンイオンを入射し、発生する二次電子をモット型スピン分析器に入射し、試験を行った。モット型スピン分析器は、電子を高電圧で加速した上で金薄膜に入射し、その際の散乱電子の角度分布の非対称性からスピンを分析する装置であり、対称位置に設置された2つの検出器の散乱電子数の差から入射電子の偏極度を導出する。試験の結果、金薄膜以外で非弾性散乱した2次電子が大量に検出器に入射し、スピン分析器として動作していないことが分かった。そのため、入射電子のコリーメータや透過電子の散乱防止板の増設を行った他、検出器の背後などを遮蔽し金薄膜以外からの散乱電子が入射されないよう分析器に改造を施した。その結果、ニッケルの磁化方向に応じて、2つの検出器で検出される散乱電子数が変化し、スピン検出器として動作していることが確認できた。, 17740264
2005 - 2006 - Measurements of optical properties of solid plasma and development of detail physical modeling
YONEDA Hitoki; KITAMURA Hikaru; NAKAMURA Nabuyuki
Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, University of Electro-Communications, Grant-in-Aid for Scientific Research (A), In this research, we investigate warm dense mater (WDM) physics which is located at the middle parameter range between condensed matter and plasmas. In this matter, atoms in high density matter is electronically excited and/or ionized. That means internal pressure in this matter is beyond Mbar and that number is the similar to the interia pressure in the large planets. Physically, there are difficulties to create the details model because both extrapolation from the condensed mater and plasma physics is failed. In the case of condensed matter model, the material condition is considered as sum of the ideal, well ordered wave-functions of atoms, but in WDM, some atoms excited electronically, some atoms keep the electron more tightly with bounded orbit. In plasma physics, the electron would be free from the individual ions, but in WDM, electrons are strongly affected by the nearest atom potential. In addition, the reason why in this parameter region, there are not good physical models is the lack of the precised experimental data. This is mainly caused from the difficulties in measurements of such short-live extreme conditions. For overcome of these difficulties, we have developed ultra-short pulse white light probe and deep ultraviolet pump laser system to identify the optical properties of these transient condition. In this measurement, the WDM condition created with deep ultra-violet ultra-short pulse lasers is diagnosed with polarimater measurements of reflected light. To obtain full set of the Stokes parameters, the reflected light is divided into four different polarization component beams and observed with frequency resolved measurements system. The temporal structures are obtained with changing the delay of the arrival time of the probe beam. With this method, we identify when the transition occurs or how parameters are changed in time and space, and what is resonant frequency of this transient material. To compare these measured data, we also construct new equation state model for this WDM. According to the comparison with Mercury behaviors, the strong interaction between each atom should be involved in this model. For example, to achieve the enough accurate curve of two-fluid region, we should include the cluster like formation of Hg atoms up to several tens of atoms. In addition, during these studies, we have found even with s and p orbit of electrons, the potential energy curves are crossed each other and the energy of 6p conditions, in some parameters, is lower than that of 6s. Finally, we find that it is necessary to include all these detail into the equation-of-state model in WDM to achieve the realistic reasonable properties., 16204048
2004 - 2006 - 多価イオンの局所的強クーロン場における分子の動力学
城丸 春夫; 中村 信行
日本学術振興会, 科学研究費助成事業, 首都大学東京, 特定領域研究, 本年度の主な成果は以下の通りである。 1.多価分子イオンのクーロン爆発解析による分子構造の直接観察に関して、今年度は前年度に引き続きジメチルスルフィドを標的分子とし、クーロン爆発イメージング法によりその2面角の計測と、SS軸周りの回転に起因する光学異性体の識別について検討を行った。入射イオンはAr^<11+>、実験室系の衝突エネルギーは165keVとし、全てのC原子、S原子イオンが同時計測されたイベントについて解析を行った。解離断片の速度ベクトルの相関をより明確にするために、重心の決定からベクトルの帰属、カイラリティー識別までの解析方法を改良した結果、P-、M-エナンチオマーを明確に識別することができた。 2.MCPを用いた多重コインシデンス測定では、MCPの感度の制限に起因する検出効率の低下が深刻な問題となっている。MCP開口部は全体の約50%であり、例えば4重コインシデンスの場合、検出効率は0.5^4=0.06にしかならない。そこでMCPの前にメッシュを配置して電子の追い返し電場を形成し、非開口部で生成した二次電子を追い返して開口部に導いて検出することにより、検出効率の改善を図った。性能評価のためAr^<8+>とN_2の衝突で生成したフラグメントイオンのコインシデンス測定を行ったところ、メッシュ-MCP間の電位差が数十ボルトのときに約1.5倍の検出効率を得た。4重コインシデンス計測効率では5倍の改善が期待される。 3.H^+、Ar^<8+>とメタノール(CH_3OHおよびCD_3OH)の衝突実験を行った。前年度の実験で同定した2価イオンの種々の解離チャネルについて、S/Nの改善による帰属の確立を目的としたコインシデンス測定を行った。また時間分解能の改善と多価イオンビームの安定化を目的として、従来行われていたパルスモードに変えてDCビームによる衝突実験のシステムの開発を進めた。, 16032211
2003 - 2005
Social Contribution Activities
Media Coverage
Academic Contribution Activities
- XXXIII International Conference on Photonic, Electronic, Atomic Collisions (ICPEAC2023)
Academic society etc, Planning etc, 25 Jul. 2023 - 01 Aug. 2023 - Atomic Processes in Plasmas 2023
Academic society etc, Planning etc, 15 May 2023 - 19 May 2023 - 12th International Conference on Atomic and Molecular Data and Their Applications (ICAMDATA 2022)
Academic society etc, Planning etc, 25 Sep. 2022 - 29 Sep. 2022 - 20th International Conference on the Physics of Highly Charged Ions (HCI 2022)
Academic society etc, Planning etc, 29 Aug. 2022 - 03 Sep. 2022 - The 14th International Symposium on Electron Beam Ion Sources and Traps (EBIST2022)
Planning etc, 14 Jun. 2022 - 17 Jun. 2022 - XXXII International Conference on Photonic, Electronic and Atomic Collisions (ICPEAC2021)
Academic society etc, Planning etc, 20 Jul. 2021 - 23 Jul. 2021 - XXXI International Conference on Photonic, Electronic, Atomic Collisions (ICPEAC2019)
Academic society etc, Planning etc, 23 Jul. 2019 - 30 Jul. 2019 - 11th International Conference on Atomic and Molecular Data and Their Applications (ICAMDATA 2018)
Planning etc, 11 Nov. 2018 - 15 Nov. 2018 - The 13th International Symposium on Electron Beam Ion Sources and Traps (EBIST2018)
Academic society etc, Planning etc, 23 Oct. 2018 - 27 Oct. 2018 - 19th International Conference on the Physics of Highly Charged Ions (HCI 2018)
Academic society etc, Planning etc, 03 Sep. 2018 - 07 Sep. 2018