Control of anomalous transport of fast ions via external control of Alfven eigenmode

• Project/Area Number: 26709071
• Research Category: Grant-in-Aid for Young Scientists (A)
• Allocation Type: Partial Multi-year Fund
• Research Field: Nuclear fusion studies
• Research Institution: National Institute for Fusion Science
• Principal Investigator: Nagaoka Kenichi 核融合科学研究所, ヘリカル研究部, 准教授 (20353443)
• Co-Investigator(Renkei-kenkyūsha): OSAKABE Masaki 核融合科学研究所, 大型ヘリカル装置計画実験統括主幹, 教授 (90280601) ; KOBAYASHI Shinji 京都大学, エネルギー理工学研究所, 助教 (70346055) ; MIYOSHI Yoshizumi 名古屋大学, 宇宙地球環境研究所・総合解析研究部, 准教授 (10377781)
• Research Collaborator: Ascasibar Enrique CIEMAT (Energy, Environment and Technology Research Center), TJ-II Operations Division National Fusion Laboratory
• Project Period (FY): 2014-04-01 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥20,800,000 (Direct Cost: ¥16,000,000、Indirect Cost: ¥4,800,000); Fiscal Year 2016: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000); Fiscal Year 2015: ¥7,800,000 (Direct Cost: ¥6,000,000、Indirect Cost: ¥1,800,000); Fiscal Year 2014: ¥8,840,000 (Direct Cost: ¥6,800,000、Indirect Cost: ¥2,040,000)
• Keywords: 高速イオン / 波動粒子相互作用 / アルベン波 / 磁場閉じ込め核融合 / 高エネルギー粒子 / 波動粒子相互作業 / アルベン固有モード / α加熱 / 高速イオン異常輸送 / 位相統計解析

Outline of Final Research Achievements

A wave-particle interaction analyzer was developed for identification of interaction between Alfven eigenmode and fast ions in magnetically confined fusion plasmas, and applied to the plasma experiments in LHD, Heliotron J and TJ-II devices. The interaction between Alfven eigenmodes and fast ions was not indetified yet, but it will be available in near future due to upgrade of electric circuit for fast ion detector in LHD.
The external control of fast-ion-driven Alfven eigenmodes was achieved in LHD, Heliotron J and TJ-II with application of ECH and ECCD.The understanding of physical mechanism of stabilization of Alfven eigenmode such as magnetic shear effect was also progressed.

Research Products

• [Int'l Joint Research] Ciemat(Spain)
• [Int'l Joint Research] Ciemat(Spain)
• [Int'l Joint Research] Kurchatov Institute(ロシア連邦)
• [Presentation] ヘリオトロンJにおけるECH/ECCDを用いた高エネルギー粒子励起MHD不安定性の制御 (2017)
  • Author(s): 長﨑百伸, 山本聡, 國分大, 小林進二, 岡田浩之, 門信一郎, 南貴司, 大島慎介, 木島滋, 釼持尚輝,明, 多和田斉興, 白波瀬一貴, 野﨑勇樹, 望月聡一郎, 飯村幹, 山田晃生, 中村祐司, 石澤明宏, G. M. Weir, 永岡賢一, 水内亨
  • Organizer: 日本物理学会年次大会
  • Place of Presentation: 大阪
  • Year and Date: 2017-03-17
• [Presentation] アルベン固有モードと相互作用する高速イオンの位相空間構造の実験観測 (2016)
  • Author(s): 永岡賢一、長壁正樹、磯部光孝、小川国大、神尾修治、小林進二、山本聡、大島慎介、水内了、J.M,Fotdecaba, E. Ascasibar
  • Organizer: プラズマ核融合学会
  • Place of Presentation: 仙台
  • Year and Date: 2016-11-29
• [Presentation] Experimental Evaluation of Energy Transfer between Fast Ions and Alfven Eigenmodes (2016)
  • Author(s): K. Nagaoka, M. Osakabe, M. Isobe, K. Ogawa, Y. Suzuki, M. Shibuya, S. Kobayashi, S. Yamamoto, Y. Miyoshi, Y. Katoh, J.M. Fontdecaba
  • Organizer: Annual meeting of American Physical Society, Division of Plasma Physics
  • Place of Presentation: San Jose, CA, USA
  • Year and Date: 2016-10-31
  • Int'l Joint Research
• [Presentation] Measurement of Phase Space Structure of Fast Ions Interacting with Alfven Eigenmode (2015)
  • Author(s): K.Nagaoka, M. Osakabe, M. Isobe, K. Ogawa, Y. Suzuki, S. Kobayashi,S. Yamamoto, Y. Miyoshi, Y. Katoh,J.M.Fontdecaba, M. Shibuya
  • Organizer: 57th Meeting of APS Division of Plasma Physics Meeting
  • Place of Presentation: Savannah, Georgia, USA
  • Year and Date: 2015-11-16
  • Int'l Joint Research
• [Presentation] Wave-particle interaction analyser for study of Alfven eigenmodes in the Large Helical Device (2015)
  • Author(s): K. Nagaoka, M. Osakabe, M. Isobe, K. Ogawa, Y. Suzuki, M. Shibuya, S. Kobayashi, S. Yamamoto, Y. Miyoshi, Y. Katoh, J. M. Fontdecaba
  • Organizer: International Stellarator/Heliotron Workshop
  • Place of Presentation: Greifswald, Germany
  • Year and Date: 2015-10-05
  • Int'l Joint Research
• [Presentation] Measurement of Phase Space Structure of Fast Ions Interacting with Alfven Eigenmodes (2015)
  • Author(s): K. Nagaoka, M. Osakabe, M. Isobe, K. Ogawa, Y. Suzuki, S. Kobayashi, S. Yamamoto, Y. Miyoshi, Y. Katoh, J. M. Fontdecaba
  • Organizer: IAEA Technical Meeting on Energetic Particles in Magnetic Confinement Systems
  • Place of Presentation: VIENNA, Austria
  • Year and Date: 2015-09-01
  • Int'l Joint Research
• [Presentation] Direct measurement of wave-particle interactions between energetic ions and Alfven wave in laboratory plasmas (2015)
  • Author(s): K. Nagaoka, M. Osakabe, M. Isobe, K. Ogawa, K. Saito, Y. Miyoshi and Y. Kato
  • Organizer: 5th East-Asia School and Workshop on Laboratory, Space, and Astrophysical plasmas
  • Place of Presentation: POSTECH, Korea
  • Year and Date: 2015-08-17 – 2015-08-22
  • Invited
• [Presentation] Experimental Measurement of Phase Space Structure of Fast Ions Interacting with Alfven Eigenmodes (2015)
  • Author(s): K. Nagaoka
  • Organizer: 5th East-Asia School and Workshop on Laboratory, Space, and Astrophysical plasmas
  • Place of Presentation: POSTECH, Pohang, Korea
  • Year and Date: 2015-08-17
  • Int'l Joint Research / Invited
• [Presentation] 高エネルギー粒子とアルベン波の 相互作用の計測 (2015)
  • Author(s): 永岡賢一, 長壁正樹、磯部光孝、小川国大、斎藤健二、三好由純、加藤雄人、小林進二、山本聡 、大島慎介 、LHD実験グループ
  • Organizer: 日本物理学会年次大会
  • Place of Presentation: 早稲田大学
  • Year and Date: 2015-03-21 – 2015-03-24
• [Presentation] Observation of Stabilizing Effect of Electron Cyclotron Heating on Fast-Ion-Driven Alfvén Eigenmodes (2014)
  • Author(s): K. Nagaoka, E. Ascasíbar, T. Ido, T. Kobayashi, A. Cappa, S. Yamamoto, K. Nagasaki, M. Osakabe, S. Ohshima, A. Shimizu, T. Estrada and Y. Takeiri
  • Organizer: 4th Asia Pacific Transport Working Group
  • Place of Presentation: Kyusyu Univ.
  • Year and Date: 2014-06-10 – 2014-06-13
  • Invited