Stabilization study of the magnetohydrodynamic instability deciding the highest plasma pressure.

• Project/Area Number: 21560866
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Nuclear fusion studies
• Research Institution: Japan Atomic Energy Agency
• Principal Investigator: TAKECHI Manabu 独立行政法人日本原子力研究開発機構, 核融合研究開発部門, 研究副主幹 (40370423)
• Co-Investigator(Kenkyū-buntansha): MATSUNAGA Go 独立行政法人日本原子力研究開発機構, 核融合研究開発部門, 研究副主幹 (10391260) ; AIBA Nobuyuki 独立行政法人日本原子力研究開発機構, 核融合研究開発部門, 研究員 (20414584)
• Project Period (FY): 2009 – 2011
• Project Status: Completed (Fiscal Year 2011)
• Budget Amount: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000); Fiscal Year 2011: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2010: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2009: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
• Keywords: トカマク / フィードバック制御 / RFP / プラズマ回転 / 磁気流体不安定性 / 核融合プラズマ

Research Abstract

It is very important to increase the plasma beta value for realization of the fusion reactor. We conducted a research on stabilization of resistive wall mode, which finally limit the beta value. The mechanism of RWM triggered by energetic driven mode has been clarified. Stabilization of RWM with very small and few coils has been clarified. However, under certain conditions, the degradation of plasma by 3D effect of sideband effect due to small size of the control coils has been observed.

Research Products

• [Journal Article] トカマクにおける三次元MHD研究の現状と他閉じ込め配位からの寄与4.巨視的不安定性の制御における外部摂動磁場の効果 (2012)
  • Author(s): 武智学
  • Journal Title: プラズマ・核融合学会誌 Volume: 88巻 Pages: 162-167
• [Journal Article] Off-axis fishbone-like instability and excitation of resistive wall modes in JT-60U and DIII-D (2011)
  • Author(s): M. Okabayashi, G. Matsunaga(2番目), M. Takechi(10番目), 他16名
  • Journal Title: Physics of Plasmas Volume: 18巻 Issue: 5 Pages: 56112-56112
  • DOI: 10.1063/1.3575159
  • Peer Reviewed
• [Journal Article] Overview of the RFX fusion s cience program (2011)
  • Author(s): P. Martin、M. Takechi(117番目), 他133名
  • Journal Title: Nuclear Fusion Volume: 51巻 Issue: 9 Pages: 94023-94023
  • DOI: 10.1088/0029-5515/51/9/094023
  • Peer Reviewed
• [Journal Article] Energetic particle driven instability in wall-stabilized high-βplasmas (2010)
  • Author(s): G. Matsunaga, N. Aiba(3番目), M. Takechi(8番目), 他8名
  • Journal Title: Nucl ear Fusion Volume: 50巻 Issue: 8 Pages: 84003-84003
  • DOI: 10.1088/0029-5515/50/8/084003
  • Peer Reviewed
• [Presentation] Current Driven RWM physics and stabilization under multiple active coil configurations in RFX-mod low q(a) tokamak plasmas (2011)
  • Author(s): T. Bolzonella, M. Takechi, et al
  • Organizer: ITPA Topical Group on MHD Stability
  • Place of Presentation: Padova, Italy
• [Presentation] Resistive Wall Modes Identification and Control in RFX-mod low qedge tokamak discharges (2011)
  • Author(s): Matteo Baruzzo, M. Takechi, et al.
  • Organizer: 53rd Annual Meeting of the APS Division of Plasma Physics
  • Place of Presentation: Salt Lake City, Utah
• [Presentation] RFX-modにおける少数のコイルを用いたRWM安定化実験 (2010)
  • Author(s): M. Takechi、T. Bolzonella、M. Baruzzo
  • Organizer: NIFS共同研究研究会「MHD理論研究の進展と課題」
  • Place of Presentation: 核融合研(岐阜県)
  • Year and Date: 2010-12-21
• [Presentation] RFX-modにおける少数のコイルを用いたRWM安定化実験 (2010)
  • Author(s): 武智学
  • Organizer: NIFS共同研究 研究会「MHD理論研究の進展と課題」
  • Place of Presentation: 核融合研(岐阜県)
  • Year and Date: 2010-12-21
• [Presentation] JT-60SAのRWM安定化システムのシミュレーション (2010)
  • Author(s): 武智学、松永剛、相羽信行(6番目), 他3名
  • Organizer: プラズマ・核融合学会第27回年会
  • Place of Presentation: 北海道大学(北海道)
  • Year and Date: 2010-12-02
• [Presentation] JT-60SAのRWM安定化システムのシミュレーション (2010)
  • Author(s): 武智学
  • Organizer: プラズマ・核融合学会 第27回年会
  • Place of Presentation: 北海道大学(北海道)
  • Year and Date: 2010-12-02
• [Presentation] 能動制御コイルを用いた抵抗性壁モードの安定化 (2010)
  • Author(s): 武智学
  • Organizer: 第15回MHD不安定性制御に関するワークショップ/MHD制御における3次元磁場構造に関する日米ワークショップ
  • Place of Presentation: マディソン(米国)
  • Year and Date: 2010-11-16
• [Presentation] JT-60SAにおける高ベータ運転のためのプラズマ制御システムの設計研究 (2010)
  • Author(s): 武智学
  • Organizer: 第23回IAEA核融合エネルギー会議
  • Place of Presentation: 大田(韓国)
  • Year and Date: 2010-10-14
• [Presentation] JT-60SAの抵抗性壁モード安定化のためのRFX装置の減少された抵抗性壁モード安定化コイルを用いたモードリジディティ研究 (2010)
  • Author(s): 武智学
  • Organizer: 第37回プラズマ物理に関する欧州物理学会年会
  • Place of Presentation: ダブリン(アイルランド)
  • Year and Date: 2010-06-22
• [Presentation] JT-60SAにおけるRWM安定化システム (2010)
  • Author(s): 武智学、松永剛、相羽信行(6番目), 他3名
  • Organizer: 第8回核融合エネルギー連合講演会
  • Place of Presentation: 高山市民文化会館(岐阜県)
  • Year and Date: 2010-06-10
• [Presentation] Mode rigidity study of RWM on RFX with reduced RWM control coils for JT-60SA RWM stabilization (2010)
  • Author(s): M. Takechi, G. Matsunaga(5番目), 他3名
  • Organizer: Proc. 37th EPS Conf. on Plasma Physics
  • Place of Presentation: Dublin, Ireland
• [Presentation] Active MHD control under different coil configurations in RFX-mod (2010)
  • Author(s): T. Bolzonella, M. Takechi, et al
  • Organizer: Proc. 37th EPS Conf. on Plasma Physics
  • Place of Presentation: Dublin, Ireland
• [Presentation] Design study of plasma control system on JT-60SA for high beta operation (2010)
  • Author(s): M. Takechi, G. Matsunaga, N. Aiba(7番目)
  • Organizer: Proceedings of 23rd IAEA Fusion Energy Conference
  • Place of Presentation: Republic of Korea
• [Presentation] (2010)
  • Author(s): G. Matsunaga, N. Aiba, K. Shinohara, Y. Sakamoto, M. Takechi, 他11人
  • Organizer: Proceedings of 23rd IAEA Fusion Energy Conference
  • Place of Presentation: Daejeon, Republic of Korea
• [Presentation] (2010)
  • Author(s): M. Okabayashi. G. Matsunaga, M. Takechi, 他12名
  • Organizer: The 52nd Annual Meeting of the APS Division of Plasma Physics Chicago
  • Place of Presentation: Illinois
• [Presentation] Design study of plasma control system on JT-60SA (2010)
  • Author(s): M. Takechi, G. Matsunaga, N. Aiba(7番目)
  • Organizer: 15th Workshop on MHD Stability Control & Joint US-Japan Workshop :"3-D Magnetic Field Effects in Control" University of Wisconsin
  • Place of Presentation: Madison, USA
• [Presentation] Design of RWM control on JT-60SA (2009)
  • Author(s): 武智学
  • Organizer: 第14回MHD安定化制御に関するワークショップ:ITERにおける能動的MHD制御
  • Place of Presentation: プリンストンプラズマ物理研究所(米国)
  • Year and Date: 2009-11-11
• [Presentation] Design of RWM control on JT-60SA (2009)
  • Author(s): M. Takechi
  • Organizer: 14th Workshop on Active Control of MHD Stability : Active MHD Control in ITER
  • Place of Presentation: Princeton, USA