Modeling visible forbidden line emission of highly-charged tungsten ions and its application to fusion plasma measurements

• Project/Area Number: 15H04235
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Nuclear fusion studies
• Research Institution: National Institute for Fusion Science
• Principal Investigator: KATO DAIJI 核融合科学研究所, ヘリカル研究部, 准教授 (60370136)
• Co-Investigator(Kenkyū-buntansha): 坂上 裕之 核融合科学研究所, ヘリカル研究部, 助教 (40250112) ; 中村 信行 電気通信大学, レーザー新世代研究センター, 准教授 (50361837)
• Co-Investigator(Renkei-kenkyūsha): MURAKAMI Izumi 核融合科学研究所, ヘリカル研究部, 教授 (30290919) ; GOTO Motoshi 核融合科学研究所, ヘリカル研究部, 准教授 (00290916) ; MORITA Shigeru 核融合科学研究所, ヘリカル研究部, 教授 (80174423)
• Research Collaborator: DING Xiaobin 西北師範大学, 准教授
• Project Period (FY): 2015-04-01 – 2018-03-31
• Project Status: Completed (Fiscal Year 2017)
• Budget Amount: ¥17,160,000 (Direct Cost: ¥13,200,000、Indirect Cost: ¥3,960,000); Fiscal Year 2017: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2016: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2015: ¥14,560,000 (Direct Cost: ¥11,200,000、Indirect Cost: ¥3,360,000)
• Keywords: タングステン分光計測 / 核融合プラズマ診断 / 可視禁制線 / タングステン多価イオン / プラズマ・核融合 / 原子・分子物理 / 磁気双極子禁制線 / 多価イオン原子過程 / 核融合プラズマ / ITER

Outline of Final Research Achievements

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.

Research Products

• [Int'l Joint Research] Northwest Normal University(China)
• [Int'l Joint Research] Sir Padampat Singhania University(India)
• [Int'l Joint Research] 西北師範大学(中国)
• [Journal Article] Electron Impact Ionization Cross Sections of Tungsten Atoms and Tungsten Ions (2018)
  • Author(s): G. Purohit, D. Kato, I. Murakami
  • Journal Title: Plasma and Fusion Research Volume: 13 Issue: 0 Pages: 3401026-3401026
  • DOI: 10.1585/pfr.13.3401026
  • NAID: 130006744397
  • ISSN: 1880-6821
  • Year and Date: 2018-04-10
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Energy levels, lifetimes and radiative data of W LV (2018)
  • Author(s): Ding Xiao-bin、Sun Rui、Koike Fumihiro、Murakami Izumi、Kato Daiji、Sakaue Hiroyuki A.、Nakamura Nobuyuki、Dong Chen-zhong
  • Journal Title: At. Data Nucl. Data Tables Volume: 119 Pages: 354-425
  • DOI: 10.1016/j.adt.2017.02.002
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Population trapping: The mechanism for the lost resonance lines in Pm-like ions (2017)
  • Author(s): Kato Daiji、Sakaue Hiroyuki A.、Murakami Izumi、Nakamura Nobuyuki
  • Journal Title: Nucl. Instrum. Methods B Volume: 408 Pages: 16-20
  • DOI: 10.1016/j.nimb.2017.05.029
  • NAID: 120007180046
  • Peer Reviewed
• [Journal Article] Correlation, Breit and Quantum Electrodynamics effects on energy level and transition properties of W54+ ion (2017)
  • Author(s): Ding Xiaobin、Sun Rui、Koike Fumihiro、Kato Daiji、Murakami Izumi、Sakaue Hiroyuki A、Dong Chenzhong
  • Journal Title: Eur. Phys. J. D Volume: 71 Issue: 3 Pages: 731-6
  • DOI: 10.1140/epjd/e2017-70829-y
  • NAID: 120007188006
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Tungsten ion distribution analysis based on visible M1 lines of highly charged tungsten ions in LHD (2017)
  • Author(s): D. Kato, H.A. Sakaue, I. Murakami, M. Goto, T. Oishi, S. Morita, K. Fujii, N. Nakamura, X.-B. Ding, and C.-Z. Dong
  • Journal Title: NIFS-PROC Volume: 102 Pages: 280-283
  • Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Collisional-radiative models for ground-state M1 line emission of highly charged tungsten ions in the LHD (2017)
  • Author(s): D. Kato, K. Fujii, M. Goto, T. Oishi, H.A. Sakaue, I. Murakami, N. Nakamura, X.-B. Ding, C.-Z. Dong, S. Morita
  • Journal Title: NIFS-PROC Volume: 103 Pages: 17-21
  • Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Experimental evaluation of fractional abundance data for W23+ - W28+ (2017)
  • Author(s): K. Fujii, D. Kato, N. Nakamura, M. Goto, S. Morita, M. Hasuo
  • Journal Title: J. Phys. B: At. Mol. Opt. Phys. Volume: 50 Issue: 5 Pages: 0550041-11
  • DOI: 10.1088/1361-6455/50/5/055004
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] E1, M1, E2 transition energies and probabilities of W54+ ions (2017)
  • Author(s): X.-B. Ding, R. Sun, J.-X. Liu, F. Koike, I. Murakami, D. Kato, H.A. Sakaue, N. Nakamura, C.-Z. Dong
  • Journal Title: J. Phys. B: At. Mol. Opt. Phys. Volume: 50 Issue: 4 Pages: 0450041-9
  • DOI: 10.1088/1361-6455/aa53ec
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Direct Observation of the M1 Transition between the Ground Term Fine Structure Levels of W VIII (2017)
  • Author(s): M. Mita, H.A. Sakaue, D. Kato, I. Murakami, and N. Nakamura
  • Journal Title: Atoms Volume: 5 Issue: 1 Pages: 131-5
  • DOI: 10.3390/atoms5010013
  • NAID: 120007191866
  • Peer Reviewed / Open Access
• [Journal Article] Atomic data and modeling for tungsten spectra (2016)
  • Author(s): D. Kato, H.A. Sakaue, I. Murakami, M. Goto, T. Oishi, S. Morita, K. Fujii, N. Nakamura, X.-B. Ding, C.-Z. Dong
  • Journal Title: NIFS-PROC Volume: 101 Pages: 152-158
  • Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Collisional-Radiative Model for the visible spectrum of W26+ ions (2016)
  • Author(s): X.-B. Ding, J.-X. Liu, F. Koike, I. Murakami, D. Kato, H.A. Sakaue, N. Nakamura, C.-Z. Dong
  • Journal Title: Phys. Lett. A Volume: 380 Issue: 7-8 Pages: 874-877
  • DOI: 10.1016/j.physleta.2015.12.034
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] UV-visible M1 line emission from highly charged tungsten ions in LHD plasmas (2016)
  • Author(s): D. Kato, H.A. Sakaue, I. Murakami, M. Goto, T. Oishi, N. Tamura, C. Suzuki, S. Morita, N. Nakamura, A. Sasaki, F. Koike, X.-B. Ding, C.-Z. Dong
  • Journal Title: NIFS-PROC Volume: 99 Pages: 100-108
  • Int'l Joint Research
• [Journal Article] Spectra of W19+-W32+ observed in the EUV region between 15 and 55 A with an electron-beam ion trap (2015)
  • Author(s): H. A. Sakaue, D. Kato, N. Yamamoto, N. Nakamura and I. Murakami
  • Journal Title: Physical Review A Volume: 92 Issue: 1
  • DOI: 10.1103/physreva.92.012504
  • Peer Reviewed
• [Journal Article] Development of quantitative atomic modeling for tungsten transport study using LHD plasma with tungsten pellet injection (2015)
  • Author(s): I. Murakami, H.A. Sakaue, C. Suzuki, D. Kato, M. Goto, N. Tamura, S. Sudo, S. Morita and LHD Experiment Group
  • Journal Title: Nuclear Fusion Volume: 55 Issue: 9 Pages: 093016-093016
  • DOI: 10.1088/0029-5515/55/9/093016
  • NAID: 120007176971
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Extreme ultraviolet and visible spectroscopy of promethiumlike heavy ions (2015)
  • Author(s): Y. Kobayashi, K. Kubota, K. Omote, A. Komatsu, J. Sakoda, M. Minoshima, D. Kato, J. Li, H.A. Sakaue, I. Murakami, and N. Nakamura
  • Journal Title: Phys. Rev. A Volume: 92 Issue: 2
  • DOI: 10.1103/physreva.92.022510
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Visible emission spectroscopy of highly charged tungsten ions in the LHD I: Survey of New Visible Emission Lines (2015)
  • Author(s): M. Shinohara, K. Fujii, D. Kato, N. Nakamura, M. Goto, S. Morita, M. Hasuo
  • Journal Title: Phys. Scr. Volume: 90 Issue: 12 Pages: 125402-125402
  • DOI: 10.1088/0031-8949/90/12/125402
  • Peer Reviewed
• [Journal Article] Visible Emission Spectroscopy of Highly Charged Tungsten Ions in LHD II: Evaluation of Tungsten Ion Temperature (2015)
  • Author(s): K. Fujii, Y. Takahashi, Y. Nakai, D. Kato, M. Goto, S. Morita, M. Hasuo
  • Journal Title: Phys. Scr. Volume: 90 Issue: 12 Pages: 125403-125403
  • DOI: 10.1088/0031-8949/90/12/125403
  • Peer Reviewed
• [Journal Article] Near UV-visible line emission from tungsten highly-charged ions in Large Helical Device (2015)
  • Author(s): D. Kato, H.A. Sakaue, I. Murakami, M. Goto, T. Oishi, S. Morita, K. Fujii, A. Sasaki, N. Nakamura, F. Koike, X.-B. Ding, C.-Z. Dong, and the LHD exp group
  • Journal Title: NIFS-PROC Volume: 98 Pages: 43-49
  • Int'l Joint Research
• [Journal Article] 核融合・天体プラズマでの多価イオン原子過程研究 (2015)
  • Author(s): 加藤太治，坂上裕之，村上泉
  • Journal Title: 原子衝突学会誌「しょうとつ」 Volume: 12 Pages: 161-178
  • Acknowledgement Compliant
• [Presentation] Observation of optical M1 lines of highly ionized Wq+ ions in the ground states and its application to W density analysis at LHD (2017)
  • Author(s): D. Kato, K. Fujii, M. Goto, I. Murakami, N. Nakamura, T. Oishi, H. A. Sakaue, N. Tamura, S. Morita
  • Organizer: China-Japan Collaboration Workshop on Stability and Transport of Edge Plasmas
  • Place of Presentation: Fuzhou, China
  • Year and Date: 2017-03-03
  • Int'l Joint Research
• [Presentation] Atomic processes and transport dynamics of tungsten highly charged ions in LHD plasmas elucidated by observing visible M1 lines (2017)
  • Author(s): D. Kato, K. Fujii, M. Goto, S. Morita, I. Murakami, N. Nakamura, T. Oishi, H.A. Sakaue
  • Organizer: Plasma Conference 2017
  • Int'l Joint Research / Invited
• [Presentation] Modeling of emission line spectra from tungsten highly charged ions and its applications to tungsten transport studies (2017)
  • Author(s): D. Kato, H.A. Sakaue, I. Murakami, M. Goto, T. Oishi, C. Suzuki, N. Tamura, S. Morita, N. Nakamura, K. Fujii
  • Organizer: The 10th EU-Japan Joint Symposium on Plasma Processing
  • Int'l Joint Research / Invited
• [Presentation] Hydrogen mediated vacancy-cluster formation in tungsten (2017)
  • Author(s): D. Kato
  • Organizer: 3rd International Workshop on Models and Data for Plasma-Material Interaction in Fusion Devices
  • Int'l Joint Research
• [Presentation] Ion fractional abundance measurements of highly ionized Wq+ ions based on visible M1 lines (2017)
  • Author(s): D. Kato
  • Organizer: 11th A3 Foresight Program Workshop on Critical Physics Issues Specific to Steady State Sustainment of High- Performance Plasmas
  • Int'l Joint Research
• [Presentation] W atomic model validation by CoBIT and W ion measurements in LHD core plasmas (2017)
  • Author(s): D. Kato, H.A. Sakaue, I. Murakami, M. Goto, T. Oishi, S. Morita, N. Nakamura, X.-B. Ding, C.-Z. Dong
  • Organizer: 12th A3 Foresight Program Workshop on Critical Physics Issues Specific to Steady State Sustainment of High- Performance Plasmas
  • Int'l Joint Research
• [Presentation] Spectroscopic studies on atomic excited state formation in reflection and sputtering induced by ion-beam bombardment on tungsten surfaces (2017)
  • Author(s): D. Kato, H.A. Sakaue, Y. Sakai, T. Kenmotsu, K. Furuya, M. Sakamoto, K. Motohashi
  • Organizer: 16th International Conference on Plasma-Facing Materials and Components for Fusion Applications
  • Int'l Joint Research
• [Presentation] Electron impact ionization cross sections of tungsten atoms and tungsten ions (2017)
  • Author(s): G. Purohit, D. Kato, I. Murakami
  • Organizer: 26th International Toki Conference on Advanced Physics in Plasma and Fusion Research
  • Int'l Joint Research
• [Presentation] Observation of visible forbidden lines of tungsten highly charged ions in LHD core plasmas and its application to ion distribution analysis (2016)
  • Author(s): D. Kato, H.A Sakau, I. Murakami, M. Goto, T. Oishi, K. Fujii, N. Nakamura, S. Morita
  • Organizer: 26th IAEA Fusion Energy Conference
  • Place of Presentation: Kyoto International Conference Centre, Kyoto
  • Year and Date: 2016-10-17
  • Int'l Joint Research
• [Presentation] Observation of visible forbidden lines of tungsten highly charged ions in LHD core plasmas and its application to ion distribution analysis (2016)
  • Author(s): D. Kato, H.A. Sakaue, I. Murakami, M. Goto, T. Oishi, K. Fujii, N. Nakamura, S. Morita and LHD Experimental Group
  • Organizer: 26th IAEA Fusion Energy Conference
  • Place of Presentation: 国立京都国際会館，京都
  • Year and Date: 2016-10-17
  • Int'l Joint Research
• [Presentation] ATOMIC DATA RESEARCH FOR VISIBLE M1 LINE EMISSION OF GROUND-STATE HIGHLY CHARGED TUNGSTEN IONS IN PLASMA (2016)
  • Author(s): D. Kato, K. Fujii, M. Goto, I. Murakami, N. Nakamura, T. Oishi, H. A. Sakaue, N. Tamura, S. Morita
  • Organizer: 10th International Conference on Atomic and Molecular Data and Their Applications
  • Place of Presentation: Gunsan Saemangeum Convention Center (GSCO), Gunsan, Republic of Korea
  • Year and Date: 2016-09-25
  • Int'l Joint Research / Invited
• [Presentation] Population trapping: the mechanism for the lost resonance lines in Pm-like ions (2016)
  • Author(s): D. Kato and N. Nakamura
  • Organizer: 18th International Conference on Physics of Highly Charged Ions
  • Place of Presentation: the Jan Kochanowski University, Kielce, Poland
  • Year and Date: 2016-09-11
  • Int'l Joint Research / Invited
• [Presentation] Collisional-radiative models for ground-state M1 line emission of highly charged tungsten ions in the LHD (2016)
  • Author(s): D. Kato
  • Organizer: 6th China-Japan-Korea Joint Seminar on Atomic and Molecular Processes in Plasma
  • Place of Presentation: Southwestern Institute of Physics, Chengdu, China
  • Year and Date: 2016-07-26
  • Int'l Joint Research
• [Presentation] Spectroscopic studies on tungsten highly charged ions in the LHD (2016)
  • Author(s): D. Kato, H.A. Sakaue, I. Murakami
  • Organizer: 6th The Physics at Electron Beam Ion Traps and Advanced Research Light Sources
  • Place of Presentation: Fudan University, Shanghai, China
  • Year and Date: 2016-06-11
  • Int'l Joint Research / Invited
• [Presentation] Spectroscopic studies on tungsten highly charged ions in the LHD (2016)
  • Author(s): D. Kato
  • Organizer: Physics at Electron Beam Ion Traps and Advanced Research Light Sources 2016
  • Place of Presentation: 複旦大学，上海（中国）
  • Year and Date: 2016-06-11
  • Int'l Joint Research / Invited
• [Presentation] Tungsten ion distribution analysis based on visible M1 lines of highly charged tungsten ions in LHD (2016)
  • Author(s): D. Kato, H.A. Sakaue, I. Murakami, M. Goto, T. Oishi, S. Morita, K. Fujii, N. Nakamura, X.-B. Ding, C.-Z. Dong
  • Organizer: 9th A3 Foresight Program Workshop on Critical Physics Issues Specific to Steady State Sustainment of High- Performance Plasmas
  • Place of Presentation: Yinchuan, China
  • Year and Date: 2016-05-17
  • Int'l Joint Research
• [Presentation] タングステン多価イオン可視禁制線の原子過程モデリング (2015)
  • Author(s): 加藤太治, 坂上裕之, 村上泉, 後藤基志, 大石鉄太郎, 森田繁, 藤井恵介, 中村信行
  • Organizer: 第32回プラズマ・核融合学会年会
  • Place of Presentation: 名古屋大学 東山キャンパス
  • Year and Date: 2015-11-24
• [Presentation] Atomic and molecular data and modeling of tungsten plasma-facing materials for fusion energy (2015)
  • Author(s): D. Kato, H.A. Sakaue, I. Murakami, T. Muroga, N. Nakamura, N. Fernanzed, and Y. Ferro
  • Organizer: 4th World Conference on Applied Sciences, Engineering and Technology
  • Place of Presentation: 熊本大学
  • Year and Date: 2015-10-24
  • Int'l Joint Research / Invited
• [Presentation] 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 (2015)
  • Author(s): 久保田海, 表一輝, 加藤太治, 村上泉, 坂上裕之, 中村信行
  • Organizer: 原子衝突学会第40回年会
  • Place of Presentation: 首都大学東京 南大沢キャンパス
  • Year and Date: 2015-09-28
• [Presentation] 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 (2015)
  • Author(s): 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
  • Organizer: 日本物理学会秋季大会
  • Place of Presentation: 関西大学 千里山キャンパス
  • Year and Date: 2015-09-16
• [Presentation] Near UV-visible line emission of tungsten highly charged ions in fusion plasmas (2015)
  • Author(s): D. Kato, H.A. Sakaue, I. Murakami, M. Goto, T. Oishi, S. Morita, K. Fujii, N. Nakamura, A. Sasaki, F. Koike, X.-B. Ding, and C.-Z. Dong
  • Organizer: XXIX International Conference on Photonic, Electronic and Atomic Collisions
  • Place of Presentation: トレド会議センター，トレド（スペイン）
  • Year and Date: 2015-07-22
  • Int'l Joint Research