Three dimensional quantitative estimation of blobby plasma transport in the edge region of the helical device

• Project/Area Number: 23860064
• Research Category: Grant-in-Aid for Research Activity Start-up
• Allocation Type: Single-year Grants
• Research Field: Nuclear fusion studies
• Research Institution: National Institute for Fusion Science
• Principal Investigator: TANAKA Hirohiko 核融合科学研究所, ヘリカル研究部, 助教 (60609981)
• Project Period (FY): 2011 – 2012
• Project Status: Completed (Fiscal Year 2012)
• Budget Amount: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000); Fiscal Year 2012: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000); Fiscal Year 2011: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
• Keywords: Blob / 静電揺動 / ヘリカル / ダイバータ / 統計的解析 / 非拡散的輸送 / 非接触プラズマ / 共鳴摂動磁場

Research Abstract

We have investigated intermittent plasma transport such as the blobby plasma transport in the edge region of the Large Helical Device (LHD). From analyses of two ion saturation current signals and magnetic geometry, we quantitatively estimated blob propagation velocity and size on a theoretical assumption. During resonant magnetic perturbation assisted detached operation, strong toroidal asymmetry was found in the propagation characteristics by multi-point measurement on several divertor plates.

Research Products

• [Journal Article] Intermittent Transport in Edge Plasma with a 3-D Magnetic Geometry in the Large Helical Device (2013)
  • Author(s): H. Tanaka, S. Masuzaki, N. Ohno, T. Morisaki, Y. Tsuji, and the LHD Experiment Group
  • Journal Title: Journal of Nuclear Materials Volume: (in press)
  • Peer Reviewed
• [Journal Article] Intermittent Transport in Edge Plasma with a 3-D Magnetic Geometry in the Large Helical Device (2013)
  • Author(s): Hirohiko Tanaka
  • Journal Title: Journal of Nuclear Materials Volume: In press Pages: S563-S566
  • DOI: 10.1016/j.jnucmat.2013.01.117
  • Peer Reviewed
• [Journal Article] Blob/Hole Generation in the Divertor Leg of the Large Helical Device (2012)
  • Author(s): H. Tanaka, N. Ohno, Y. Tsuji, S. Kajita, S. Masuzaki, M. Kobayashi, T. Morisaki, A. KomoriKomori, and the LHD Experimental Komori, and the LHD Experimental
  • Journal Title: Plasma and Fusion Research Volume: 7 Issue: 0 Pages: 1402152-1402152
  • DOI: 10.1585/pfr.7.1402152
  • NAID: 130003366234
  • ISSN: 1880-6821
  • Peer Reviewed
• [Presentation] LHD諸条件における周辺プラズマ揺動の統計的解析 (2012)
  • Author(s): 田中宏彦
  • Organizer: 日本物理学会2012年年次大会
  • Place of Presentation: 関西学院大学(兵庫県)
  • Year and Date: 2012-03-25
• [Presentation] LHD周辺領域における多点静電揺動計測 (2012)
  • Author(s): 田中宏彦、増崎貴、大野哲靖、森崎友宏、 小林政弘、辻義之、LHD 実験グループ
  • Organizer: 第29回プラズマ・核融合学会年会
  • Place of Presentation: クローバープラザ、福岡
• [Presentation] Non-Diffusive Cross-Field Transport in the LHD Detached Divertor Plasma (2012)
  • Author(s): H. Tanaka, N. Ohno, S. Masuzaki, T. Akiyama, M. Kobayashi, Y. Tsuji, and LHD Experiment Group
  • Organizer: 22nd International Toki Conference
  • Place of Presentation: Toki, Japan
• [Presentation] Intermittent Transport in the Edge Plasma with a 3-D Magnetic Geometry on the Large Helical Device (2012)
  • Author(s): H. Tanaka, S. Masuzaki, N. Ohno, T. Morisaki, Y. Tsuji, and the LHD Experimental Group
  • Place of Presentation: Aachen, Germany
• [Presentation] LHD 諸条件 における周辺プラズマ揺動の統計的解 析 (2012)
  • Author(s): 田中宏彦、増崎貴、大野哲靖、森崎友宏、 辻義之、LHD 実験グループ
  • Organizer: 日本物理学会2012 年年次大会
  • Place of Presentation: 関西学院大学、兵庫
• [Presentation] LHD周辺領域における多点静電揺動計測 (2012)
  • Author(s): 田中宏彦
  • Organizer: 第29回プラズマ・核融合学会年会
  • Place of Presentation: クローバープラザ, 福岡, 日本
• [Presentation] Non-Diffusive Cross-Field Transport in the LHD Detached Divertor Plasma (2012)
  • Author(s): Hirohiko Tanaka
  • Organizer: 22nd International Toki Conference
  • Place of Presentation: Ceratopia Toki, Gifu, Japan
• [Presentation] Intermittent Transport in the Edge Plasma with 3-D Magnetic Geometry on the Large Helical Device (2012)
  • Author(s): Hirohiko Tanaka
  • Organizer: 20th International Conference on Plasma Surface Interactions 2012
  • Place of Presentation: Eurogress, Aachen, Germany
• [Presentation] Study of Intermittent Edge Plasma Transport in LHD (2011)
  • Author(s): 田中宏彦
  • Organizer: Plasma Conference 2011
  • Place of Presentation: 石川県立音楽堂(石川県)
  • Year and Date: 2011-11-23
• [Presentation] Blob/Hole generation near the divertor leg in LHD (2011)
  • Author(s): 田中宏彦
  • Organizer: 1^<st> Asia Pacific Transport Working Group (APTWG) International Conference
  • Place of Presentation: 核融合科学研究所(岐阜県)
  • Year and Date: 2011-06-15
• [Presentation] LHD 周辺領域で発生 する間欠的プラズマ輸送現象の研究 (2011)
  • Author(s): 田中宏彦、増崎貴、大野哲靖、森崎友宏 小林政弘、辻義之、林祐貴、江角直道、 LHD 実験グループ
  • Organizer: Plasma Conference 2011
  • Place of Presentation: 石川県立音楽堂、金沢
• [Presentation] Blob/hole generation near the divertor leg in LHD (2011)
  • Author(s): H. Tanaka, N. Ohno, Y. Tsuji, S. Kajita, S. Masuzaki, M. Kobayashi, T. Morisaki, and A. Komori
  • Organizer: 1st Asia Pacific Transport Working Group International Conference
  • Place of Presentation: NIFS, Japan
• [Remarks] MATLAB/Octave プログラム公開ページ
  • URL: http://www.ees.nagoya-u.ac.jp/~koukai/purakaku85/
• [Remarks]
  • URL: http://hdp.nifs.ac.jp/soken/tanaka/jisseki/jisseki.html