アルヴェン速度が波動粒子相互作用による高速イオン輸送・閉じ込めに与える影響

2021 Fiscal Year Annual Research Report

• Project/Area Number: 19K03798
• Research Institution: National Institute for Fusion Science
• Principal Investigator: 小川 国大 核融合科学研究所, ヘリカル研究部, 准教授 (90632274)
• Project Period (FY): 2019-04-01 – 2022-03-31
• Keywords: 核融合プラズマ / 高エネルギー粒子閉じ込め / 中性子計測 / 重水素実験

Outline of Annual Research Achievements

重水素ガスを用いたプラズマ実験においては、プラズマの外に出てくる中性子総発生率及び中性子発生分布を計測することで、プラズマ内部の高エネルギー粒子閉じ込め情報及びその時間変化を得ることが出来る。高エネルギー粒子によってアルヴェン固有モードが励起された際に、既設のアルヴェン固有モードの空間分布計測器及び損失高エネルギーイオン束計測器に、中性子計測器を加えることでプラズマ内部に閉じ込められている高エネルギー粒子の輸送の様子を取得する。
本年度は、高エネルギー粒子励起電磁流体力学的不安定性による高エネルギー粒子輸送研究に関する成果で、第２８回IAEA核融合エネルギー会議において、"A Comprehensive Study of Energetic Particle Transport Due to Energetic Particle Driven MHD Instabilities in LHD Deuterium Plasmas"と題した口頭発表を行い、Nuclear Fusion誌へ論文を掲載した。また、中磁場強度領域における多数のアルヴェン固有モードによる高エネルギー粒子輸送解析を行い、IAEA高エネルギー粒子閉じ込めに関する技術会合において、"Energetic Ion Transport due to Energetic Particle Continuum Mode in Deuterium LHD Plasmas"と題した口頭発表を行い、Nuclear Fusion誌へ論文投稿を行った。これまで、高エネルギー粒子閉じ込め研究の業績によって、プラズマ・核融合学会　第２９回論文賞、プラズマ・核融合学会　第２０回産業技術賞、及び2021年度 吉川允二記念核融合エネルギー奨励賞　優秀賞を受賞した。その他、物理学の最前線に関する国際会議において、"Energetic Particle Confinement Study Using Integrated Neutron Diagnostics in the Large Helical Device Deuterium Plasmas"と題した口頭発表などを行った。

Research Products

• [Int'l Joint Research] Institute of Plasma Physics(中国)
  • Country Name: CHINA
  • Counterpart Institution: Institute of Plasma Physics
• [Int'l Joint Research] Korea Institute of Fusion Energy(韓国)
  • Country Name: KOREA (REP. OF KOREA)
  • Counterpart Institution: Korea Institute of Fusion Energy
• [Int'l Joint Research] Max Planck Institute for Plasma Physics(ドイツ)
  • Country Name: GERMANY
  • Counterpart Institution: Max Planck Institute for Plasma Physics
• [Int'l Joint Research] Oak Ridge National Laboratory(米国)
  • Country Name: U.S.A.
  • Counterpart Institution: Oak Ridge National Laboratory
• [Journal Article] Evaluation of Alpha Particle Emission Rate Due to the p-¹¹B Fusion Reaction in the Large Helical Device (2022)
  • Author(s): Ogawa K.、Isobe M.、Nuga H.、Seki R.、Ohdachi S.、Osakabe M.
  • Journal Title: Fusion Science and Technology Volume: 78 Pages: 175～185
  • DOI: 10.1080/15361055.2021.1973294
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] A study of beam ion and deuterium?deuterium fusion-born triton transports due to energetic particle-driven magnetohydrodynamic instability in the large helical device deuterium plasmas (2021)
  • Author(s): Ogawa K.、Isobe M.、Nuga H.、Kamio S.、Fujiwara Y.、Kobayashi M.I.、Sangaroon S.、Takada E.、Seki R.、Yamaguchi H.、Murakami S.、Jo J.、Osakabe M.
  • Journal Title: Nuclear Fusion Volume: 61 Pages: 096035～096035
  • DOI: 10.1088/1741-4326/ac0d8a
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Time-resolved secondary triton burnup 14 MeV neutron measurement by a new scintillating fiber detector in middle total neutron emission ranges in deuterium large helical device plasma experiments (2021)
  • Author(s): Ogawa K.、Isobe M.、Sangaroon S.、Takada E.、Nakada T.、Murakami S.、Jo J.、Zhong G. Q.、Zhang Yipo、Tamaki S.、Murata I.
  • Journal Title: AAPPS Bulletin Volume: 31 Pages: 1-9
  • DOI: 10.1007/s43673-021-00023-2
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Characteristics of neutron emission profile from neutral beam heated plasmas of the Large Helical Device at various magnetic field strengths (2021)
  • Author(s): Ogawa K、Isobe M、Sugiyama S、Spong D A、Sangaroon S、Seki R、Nuga H、Yamaguchi H、Kamio S、Fujiwara Y、Kobayashi M I、Jo J、Osakabe M
  • Journal Title: Plasma Physics and Controlled Fusion Volume: 63 Pages: 065010～065010
  • DOI: 10.1088/1361-6587/abf575
  • Peer Reviewed / Int'l Joint Research
• [Presentation] A Comprehensive Study of Energetic Particle Transport Due to Energetic Particle Driven MHD Instabilities in LHD Deuterium Plasmas (2021)
  • Author(s): K. Ogawa, M. Isobe, S. Kamio, Y. Fujiwara, S. Sangaroon, R. Seki, H. Nuga, H. Yamaguchi, M. I. Kobayashi, and M. Osakabe
  • Organizer: The 28th IAEA Fusion Energy Conference (FEC 2020), Online, 10-15 May 2021
  • Int'l Joint Research
• [Presentation] Energetic Ion Transport due to Energetic Particle Continuum Mode in Deuterium LHD Plasmas (2021)
  • Author(s): K. Ogawa, M. Isobe, S. Kamio, H. Nuga, R. Seki, S. Sangaroon, H. Yamaguchi, Y. Fujiwara, E. Takada, S. Murakami, J. Jo, and M. Osakabe
  • Organizer: 17th IAEA Technical Meeting on Energetic Particles and Theory of Plasma Instabilities in Magnetic Confinement Fusion
  • Int'l Joint Research
• [Presentation] Evaluation of alpha particle emission rate due to p-11B fusion reaction in the Large Helical Device (2021)
  • Author(s): K. Ogawa, M. Isobe, H. Nuga, R. Seki, S. Ohdachi, and M. Osakabe
  • Organizer: IEEE Pulsed Power Conference & Symposium on Fusion Engineering
  • Int'l Joint Research
• [Presentation] Energetic Particle Confinement Study Using Integrated Neutron Diagnostics in the Large Helical Device Deuterium Plasmas (2021)
  • Author(s): Kunihiro Ogawa, Mitsutaka Isobe, Siriyaporn Sangaroon, Hideo Nuga, Ryosuke Seki, Shuji Kamio, Eiji Takada, and Masaki Osakabe
  • Organizer: International Conference on Frontiers of Physics -2022 (ICFP-2022) Kathmandu Nepal
  • Int'l Joint Research