Study on the heat transport in magnetically confined plasmas by simultaneous measurement of micro-scale turbulence and macro-scale fluctuation

• Project/Area Number: 15K06653
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Nuclear fusion studies
• Research Institution: National Institute for Fusion Science
• Principal Investigator: Ido Takeshi 核融合科学研究所, ヘリカル研究部, 准教授 (50332185)
• Co-Investigator(Kenkyū-buntansha): 清水 昭博 核融合科学研究所, ヘリカル研究部, 助教 (00390633) ; 谷池 晃 神戸大学, 海事科学研究科, 准教授 (50283916)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Project Status: Completed (Fiscal Year 2017)
• Budget Amount: ¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000); Fiscal Year 2017: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2016: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2015: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
• Keywords: 磁場閉じ込めプラズマ / 乱流 / 高速イオン励起不安定性 / 重イオンビームプローブ / HIBP / 重イオン検出器 / GAM / 波動・粒子相互作用 / 重イオン位置検出器 / 亜臨界不安定性

Outline of Final Research Achievements

In order to investigate the mechanism of the particle and heat transport in magnetically confined plasmas by measuring micro-scale turbulence and macro-scale fluctuations which may affect the turbulence, we have developed a position sensitive detector with high detection efficiency for the heavy ion beam probe on the Large Helical Device. It was confirmed that the developed detector could measure the beam position, sufficiently. However, the improvement in the detection efficiency was only 20 %, compared with the previous detector. Although the plasma experiment was performed under low density plasmas, the modulation of micro-scale turbulence by the macro-scale energetic-particle-driven GAM (EGAM) was observed. In addition, the spatial asymmetry and abrupt excitation of the GAM, which may affect the ion heat transport, were also found.

Research Products

• [Journal Article] Observation of subcritical geodesic acoustic mode excitation in the large helical device (2017)
  • Author(s): Ido T.、Itoh K.、Lesur M.、Osakabe M.、Shimizu A.、Ogawa K.、Nishiura M.、Yamada I.、Yasuhara R.、Kosuga Y.、Sasaki M.、Ida K.、Inagaki S.、Itoh S.-I.、the LHD Experiment Group
  • Journal Title: Nucl. Fusion Volume: 57 Issue: 7 Pages: 72009-72009
  • DOI: 10.1088/1741-4326/aa665a
  • NAID: 120007181937
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Abrupt excitation of intense geodesic acoustic mode in the LHD (2016)
  • Author(s): T. Ido, K. Itoh, M. Lesur, M. Osakabe, A. Shimizu, K. Ogawa, M. Nishiura, Y. Kosuga, M. Sasaki, K. Ida, S. Inagaki, S. -I. Itoh, and the LHD Experiment Group
  • Journal Title: Proceedings of 26th IAEA Fusion Energy Conference Volume: -
  • Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Nonlinear excitation of subcritical fast ion-driven modes (2016)
  • Author(s): M. Lesur, K. Itoh, T. Ido, S.-I. Itoh, Y. Kosuga, M. Sasaki, S. Inagaki, M. Osakabe, K. Ogawa, A. Shimizu, K. Ida
  • Journal Title: Nuclear Fusion Volume: 56 Issue: 5 Pages: 0560091-14
  • DOI: 10.1088/0029-5515/56/5/056009
  • NAID: 120007186436
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] 2D spatial profile measurements of potential fluctuation with heavy ion beam probe on the Large Helical Device (2016)
  • Author(s): A. Shimizu, T. Ido, M. Nishiura, S. Kato, K. Ogawa, H. Takahashi, H. Igami, Y. Yoshimura, S. Kubo, T. Shimozuma
  • Journal Title: Review of Scientific Instruments Volume: 87 Issue: 11
  • DOI: 10.1063/1.4963908
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Strong Destabilization of Stable Modes with a Half-Frequency Associated with Chirping Geodesic Acoustic Modes in the Large Helical Device (2016)
  • Author(s): T. Ido, K. Itoh, M. Osakabe, M. Lesur, A. Shimizu, K. Ogawa, K. Toi, M. Nishiura, S. Kato, M. Sasaki, K. Ida, S. Inagaki, S.-I. Itoh, and the LHD Experiment Group
  • Journal Title: Physical Review Letters Volume: 116 Issue: 1 Pages: 015002-015002
  • DOI: 10.1103/physrevlett.116.015002
  • NAID: 120007181934
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Nonlinear Excitation of Subcritical Instabilities in a Toroidal Plasma (2016)
  • Author(s): M. Lesur, K. Itoh, T. Ido, M. Osakabe, K. Ogawa, A. Shimizu, M. Sasaki, K. Ida, S. Inagaki, S.-I. Itoh, and the LHD Experiment Group
  • Journal Title: Physical Review Letters Volume: 116 Issue: 1 Pages: 015003-015003
  • DOI: 10.1103/physrevlett.116.015003
  • NAID: 120007181933
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Presentation] 大型ヘリカル装置における 高速イオン励起GAMの空間構造 (2018)
  • Author(s): 井戸毅，清水昭博，長壁正樹, 佐々木真
  • Organizer: 日本物理学会 第73回年次大会
• [Presentation] 大型ヘリカル装置における測地線音響モードの 亜臨界励起現象の実験的検証 (2017)
  • Author(s): 井戸 毅
  • Organizer: 日本物理学会第72回年次大会
  • Place of Presentation: 大阪大学豊中キャンパス
  • Year and Date: 2017-03-17
  • Invited
• [Presentation] Energetic particle-driven Geodesic Acoustic Mode in the Large Helical Device (2017)
  • Author(s): Takeshi Ido, Akihiro Shimizu, Masaki Osakabe, Kimitaka Itoh, Maxime Lesur, et al.,
  • Organizer: 1st Asia-Pacific Conference on Plasma Physics
  • Int'l Joint Research / Invited
• [Presentation] Energetic Particle-Driven GAM in deuterium plasma in LHD (2017)
  • Author(s): T. Ido, A. Shimizu, K. Ogawa, T. Tokuzawa, M. Osakabe
  • Organizer: 7th Asia Pacific Transport Working Group (APTWG2017) International Conference
  • Int'l Joint Research
• [Presentation] 大型ヘリカル装置における高速イオン励起不安定性に対する乱流の応答 (2017)
  • Author(s): 井戸 毅、清水 昭博、徳澤 季彦、新美 航、竹村 圭司
  • Organizer: Plasma Conference 2017
• [Presentation] LHD用HIBPによる高精度計測のための高エネルギー重イオン検出器の開発 (2017)
  • Author(s): 新美 航、井戸 毅、清水 昭博
  • Organizer: Plasma Conference 2017
• [Presentation] Detection of spatial structure of energetic particle-driven geodesic acoustic mode by a heavy ion beam probe in the Large Helical Device (2017)
  • Author(s): Takeshi Ido, Akihiro Shimizu, Kunihiro Ogawa, Masaki Osakabe
  • Organizer: 26th International Toki Conference
• [Presentation] Energetic Particle‐Driven GAM in the Large Helical Device (2016)
  • Author(s): Takeshi Ido
  • Organizer: 1ST NFRI MINI-WORKSHOP ON ENERGETIC PARTICLES
  • Place of Presentation: Daejeon, Korea
  • Year and Date: 2016-11-22
  • Invited
• [Presentation] Abrupt excitation of intense geodesic acoustic mode in the LHD (2016)
  • Author(s): T. Ido, K. Itoh, M. Lesur, M. Osakabe, A. Shimizu, K. Ogawa, M. Nishiura, Y. Kosuga, M. Sasaki, K. Ida, S. Inagaki, S. -I. Itoh, and the LHD Experiment Group
  • Organizer: 26th IAEA Fusion Energy Conference
  • Place of Presentation: Kyoto, Japan
  • Year and Date: 2016-10-17
  • Int'l Joint Research
• [Presentation] Abrupt excitation of a subcritical instability in magnetically confined plasmas in the LHD (2016)
  • Author(s): T. Ido, K. Itoh, M. Lesur, M. Osakabe, A. Shimizu, K. Ogawa, M. Nishiura, Y. Kosuga, M. Sasaki, K. Ida, S. Inagaki, S. -I. Itoh, and the LHD Experiment Group
  • Organizer: 6th East-Asia School and Workshop on Laboratory, Space, Astrophysical Plasmas
  • Place of Presentation: Tsukuba, Japan
  • Year and Date: 2016-07-11
  • Int'l Joint Research
• [Presentation] Observation of subcritical GAM excitation in the LHD (2016)
  • Author(s): T. Ido, K. Itoh, M. Lesur, M. Osakabe, A. Shimizu, K. Ogawa, M. Nishiura, Y. Kosuga, M. Sasaki, K. Ida, S. Inagaki, S. -I. Itoh, and the LHD Experiment Group
  • Organizer: 18th International Congress on Plasma Physics
  • Place of Presentation: Kaohsiung, Taiwan
  • Year and Date: 2016-06-27
  • Int'l Joint Research / Invited
• [Presentation] LHDにおける高速イオン励起GAMの突発的励起現象の特性 (2016)
  • Author(s): 井戸毅, 伊藤公孝, 長壁正樹, M. Lesur, 清水昭博, 小川国大, 西浦正樹, 居田克巳, 稲垣滋, 伊藤早苗
  • Organizer: 日本物理学会第71回年次大会
  • Place of Presentation: 東北学院大学泉キャンパス
  • Year and Date: 2016-03-19
• [Presentation] LHDにおける高エネルギー重イオンビームプローブのための高効率位置検出器の開発 (2016)
  • Author(s): 井戸 毅, 清水昭博，牧野良平，加藤眞治，塚田究，谷池晃
  • Organizer: 第11回核融合エネルギー連合講演会
  • Place of Presentation: 九州大学伊都キャンパス
• [Presentation] LHDにおける高速イオン励起Geodesic acoustic modeの突発的励起の観測 (2015)
  • Author(s): 井戸毅, 伊藤公孝, 長壁正樹, M. Lesur, 清水昭博, 小川国大, 東井和夫, 西浦正樹, 居田克巳, 稲垣滋, 伊藤早苗
  • 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] Spatial structures of energetic-particle driven geodesic acoustic mode in the LHD (2015)
  • Author(s): T. Ido, A. Shimizu, M. Osakabe, T. Watari, K. Ogawa, K. Toi, M. Nishiura, K. Itoh, and the LHD Experiment Group
  • Organizer: 25th International Toki Conference
  • Place of Presentation: 岐阜県土岐市セラトピア土岐
  • Year and Date: 2015-11-03
  • Int'l Joint Research
• [Presentation] LHDにおける高速イオン励起n = 0モードの特性 (2015)
  • Author(s): 井戸 毅, 長壁正樹, 清水昭博, 渡利徹夫，小川国大, 東井和夫, 伊藤公孝, LHD実験グループ
  • Organizer: 日本物理学会2015年秋季大会
  • Place of Presentation: 関西大学千里山キャンパス
  • Year and Date: 2015-09-16
• [Remarks] 高温プラズマ中の新現象を発見 新しい突発現象の発見とそのメカニズムの解明
  • URL: http://www.nifs.ac.jp/press/151209.html
• [Remarks] LHDで高温プラズマ中の新しい突発現象を発見 －大振幅波の突発的発生とその機構の解明－
  • URL: http://www.nifs.ac.jp/lhdreport/mailinfo_269.html
• [Remarks] 高温プラズマ中の新現象を発見 －新しい突発現象の発見とそのメカニズムの解明－
  • URL: http://www.nifs.ac.jp/press/151209.html