Effects of beam pressure on the MHD equilibria and stabilities in high beta helical plasmas

2009 Fiscal Year Final Research Report

• Project/Area Number: 18360445
• 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: WATANABE Kiyomasa National Institute for Fusion Science, 大型ヘリカル研究部, 准教授 (00249963)
• Co-Investigator(Kenkyū-buntansha): SAKAKIBARA Satoru 核融合科学研究所, 大型ヘリカル研究部, 准教授 (90280594) ; OSAKABE Masaki 核融合科学研究所, 大型ヘリカル研究部, 准教授 (90280601) ; NAGAOKA Kenichi 核融合科学研究所, 大型ヘリカル研究部, 助教 (20353443) ; SUZUKI Yasuhiro 核融合科学研究所, 大型ヘリカル研究部, 助教 (20397558) ; MATSUMOTO Yutaka 北海道大学, 工学研究科, 助教 (40360929) ; GOTO Motoshi 核融合科学研究所, 大型ヘリカル研究部, 助教 (00290916)
• Co-Investigator(Renkei-kenkyūsha): SDEKI Ryouske 北海道大学, 工学研究科・博士後期課程 (80581066)
• Research Collaborator: COOPER W.A. ローザンヌプラズマ物理研究所(スイス), 主任研究員 ; PUSTOVITOV V. クルチャトフ研究所(ロシア), 主任研究員
• Project Period (FY): 2006 – 2009
• Keywords: プラズマ・核融合 / ビーム圧力 / MHD平衡・安定性 / ヘリカル / 磁場閉じ込め / 非等方圧力

Research Abstract

A probe to measure the particle and heat flux was designed and installed in a helical device, and it is applied to measure the heat flux from the reentering fast ions. The distribution function analyzing code of the fast ions in the high beta helical plasmas was developed, and it is applied to the evaluation of the beam pressure profile and its anisotropy induced by the neutral beam injection. The dependence of the magnetic axis shift on the pressure anisotropy was evaluated by the magnetic probe signal based on the calibration with the Monte-Carlo method, and its results are studied trough the comparison with some theoretical models.

Research Products

• [Journal Article] CHARACTERISTICS OF MHD EQUILIBRIUM AND RELATED ISSUES ON LHD (2010)
  • Author(s): K.Y.Watanabe, Y.Suzuki, S.Sakakibara, et al.
  • Journal Title: Fusion Science & Technology 50巻,7号
  • Peer Reviewed
• [Journal Article] Monte-Carlo Study Based on Real Coordinates for Perpendicularly Injected High-Energy Ions in the LHD High-Beta Plasma (2010)
  • Author(s): Ryosuke SEKI, Yutaka MATSUMOTO, Yasuhiro SUZUKI, Kiyomasa WATANABE, Kiyotaka HAMAMATSU, Masafumi ITAGAKI
  • Journal Title: Plasma and Fusion Research 5巻 Pages: 014_1-3
  • Peer Reviewed
• [Journal Article] Drift stabilization of ballooning modes in a high-βLHD configuration (2010)
  • Author(s): L.Brocher, W.A.Cooper, J.P.Graves, G.A.Cooper, Y.Narushima, K.Y.Watanabe
  • Journal Title: Nuclear Fusion 50巻 Pages: 025009_1-7
  • Peer Reviewed
• [Journal Article] Three-dimensional anisotropic pressure free boundary equilibria (2009)
  • Author(s): W.A.Cooper, S.P.Hirshman, P.Merkel, J.P.Graves, J.Kisslinger, H.F.G.Wobig, Y.Narushima, S.Okamura, K.Y.Watanabe
  • Journal Title: Computer Physics Communications 180巻 Pages: 1524-1533
  • Peer Reviewed
• [Journal Article] Local observations of fast ion responses to energetic particle modes using a directional probe in the Compact Helical System (CHS) (2008)
  • Author(s): K.Nagaoka, M.Isobe, K.Toi, K.Goto, T.Ito, Y.Todo, M.Osakabe, S.Ohshima, A.Shimizu, A.Fujisawa, H.Nakano, Y.Takeiri, K.Y.Watanabe, T.Akiyama, Y.Yoshimura, C.Suzuki, S.Nishimura, K.Matsuoka, S.Okamura, the CHS experimental group
  • Journal Title: Nuclear Fusion 48巻 Pages: 084005_1-9
  • Peer Reviewed
• [Presentation] Anisotropic Pressure Effect on the MHD Equilibrium in LHD (2009)
  • Author(s): K.Y.Watanabe, et al.
  • Organizer: 19th International Toki Conference
  • Place of Presentation: Toki, Japan
  • Year and Date: 2009-12-09
• [Presentation] Monte-Carlo Study of Perpendicularly Injected High-Energy Particles using Real Coordinate System in LHD (2009)
  • Author(s): R.Seki, Y.Matsumoto, Y.Suzuki, K.Y.Watanabe, et.al.
  • Organizer: 17th International International Stellarator/Heliotron Workshop
  • Place of Presentation: Princeton, USA
  • Year and Date: 2009-10-14
• [Presentation] Recent study of the high performance confinement and the high beta plasmas on the Large Helical Devices (2008)
  • Author(s): K.Y.Watanabe, et.al.
  • Organizer: 18th International Toki conference
  • Place of Presentation: Toki, Japan
  • Year and Date: 2008-12-09
• [Presentation] LHDにおける圧力非等方度のMHD平衡への影響 (2007)
  • Author(s): 渡邊清政, 他
  • Organizer: プラズマ・核融合学会年会
  • Place of Presentation: イーグレ姫路
  • Year and Date: 2007-11-27
• [Presentation] Confinement study on the reactor relevant high beta LHD plasmas (2007)
  • Author(s): K.Y.Watanabe, et.al.
  • Organizer: Joint Conference of 17th International Toki Conference and 16th International Stellarator/Heliotron Workshop
  • Place of Presentation: セラトピア土岐
  • Year and Date: 2007-10-18