Collapse phenomena of toroidal plasma by nonlinear MHD simulation

• Project/Area Number: 20760583
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Nuclear fusion studies
• Research Institution: National Institute for Fusion Science
• Principal Investigator: MIZUGUCHI Naoki 核融合科学研究所, ヘリカル研究部, 准教授 (70332187)
• Project Period (FY): 2008 – 2011
• Project Status: Completed (Fiscal Year 2011)
• Budget Amount: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000); Fiscal Year 2011: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000); Fiscal Year 2010: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2009: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2008: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
• Keywords: MHD / シミュレーション / 崩壊現象 / ヘリオトロン / RFP / ELM

Research Abstract

Nonlinear Magnetohydrodynamic(MHD) simulations have been executed for a comprehensive modeling of collapse phenomena in toroidal plasmas. The edge-localized mode(ELM) in spherical tokamak, the core density collapse(CDC) in heliotron, and the helical structure formation in reversed-field pinch(RFP) have been examined, comparing with experimental observations. Several common natures such as the magnetic reconnections under the pressure gradient which cause three-dimensional relaxed structures have been found out.

Research Products

• [Journal Article] Modeling of Formation of Helical Structures in Reversed-Field Pinch (2012)
  • Author(s): N. Mizuguchi, A. Sanpei, S. Fujita, K. Oki, H. Himura, S. Masamune, and K. Ichiguchi
  • Journal Title: Plasma and Fusion Research Volume: Vol.7(掲載予定)
  • NAID: 130004467832
• [Journal Article] Nonlinear dynamics of a collapse phenomenon in heliotron plasma with large pressure gradient (2009)
  • Author(s): Naoki Mizuguchi, Yasuhiro SUZUKI, and Nobuyoshi OHYABU
  • Journal Title: Nuclear Fusion Volume: Vol.49 Issue: 9 Pages: 95023-95023
  • DOI: 10.1088/0029-5515/49/9/095023
• [Journal Article] Nonlinear dynamics of a collapse phenomenon in heliotron plasma with large pressure gradient (2009)
  • Author(s): N.Mizuguchi, Y.Suzuki, N.Ohyabu
  • Journal Title: Nuclear Fusion 49
  • Peer Reviewed
• [Journal Article] Nonlinear simulation of collapse phenomenon in helical plasma with large pressure gradient (2008)
  • Author(s): Naoki MIZUGUCHI, Yasuhiro SUZUKI, and Nobuyoshi OHYABU
  • Journal Title: Plasma and Fusion Research Volume: Vol.3
  • NAID: 130000263979
  • URL: http://nifs-repository.nifs.ac.jp/handle/10655/6371
• [Journal Article] Nonlinear Simulation of Collapse Phenomenon in Helical Plasma with a Large Pressure Gradient (2008)
  • Author(s): N.Mizuguchi, Y.Suzuki, N.Ohyabu
  • Journal Title: Plasma and Fusion Research 3
  • NAID: 130000263979
  • Peer Reviewed
• [Journal Article] Nonlinear Simulation of Collapse Phenomenon in Helical Plasma with a Large Pressure Gradient (2008)
  • Author(s): N. Mizuguchi
  • Journal Title: Plasma and Fusion Research 3
  • NAID: 130000263979
  • Peer Reviewed
• [Presentation] Modeling of Formation of Helical Structures in Reversed-Field Pinch (2011)
  • Author(s): N. Mizuguchi, A. Sanpei, S. Fujita, K. Oki, H. Himura, S. Masamune, K. Ichiguchi
  • Organizer: 21st International Toki Conference on Integration of Fusion Science and Technology for Steady State Operation
  • Place of Presentation: Toki
  • Year and Date: 2011-12-01
• [Presentation] 逆磁場ピンチにおける3次元構造の形成に関する非線形MHDシミュレーション (2011)
  • Author(s): 水口直紀,三瓶明希夫,藤田慎一,大木健輔,比村治彦,政宗貞男,市口勝治
  • Organizer: Plasma Conference 2011
  • Place of Presentation: 石川県立音楽堂(金沢市)
• [Presentation] Modeling of Formation of Helical Structures in Reversed-Field Pinch (2011)
  • Author(s): N.Mizuguchi
  • Organizer: 21st International Toki Conference
  • Place of Presentation: セラトピア土岐(土岐市)
• [Presentation] Nonlinear analysis of MHD collapse phenomena in the core region of helical system (2010)
  • Author(s): N.Mizuguchi, K.Ichiguchi
  • Organizer: 20th International Toki Conference
  • Place of Presentation: セラトピア土岐(岐阜県)
  • Year and Date: 2010-12-08
• [Presentation] ヘリカル系のコアプラズマのMHD現象の非線形解析 (2010)
  • Author(s): 水口直紀, 市口勝治
  • 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] ヘリカル系のコアプラズマのMHD現象の非線形解析 (2010)
  • Author(s): 水口直紀,市口勝治
  • Organizer: プラズマ・核融合学会第27回年会
  • Place of Presentation: 北海道大学学術交流会館(札幌市)
• [Presentation] Nonlinear analysis of MHD collapse phenomena in the core region of helical system (2010)
  • Author(s): Naoki MIZUGUCHI, and Katsuji ICHIGUCHI
  • Organizer: 20th International Toki Conference on The Next Twenty Years in Plasma and Fusion Science
  • Place of Presentation: Toki
• [Presentation] ヘリカル系における圧力崩壊過程の非線形シミュレーション (2008)
  • Author(s): 水口直紀,市口勝治
  • Organizer: プラズマ・核融合学会第27回年会
  • Place of Presentation: 栃木県総合文化センター(宇都宮市)
• [Presentation] Nonlinear Dynamics of Collapse Phenomena in Heliotron Plasma with Large Pressure Gradient (2008)
  • Author(s): N. Mizuguchi, Yasuhiro SUZUKI, and Nobuyoshi OHYABU
  • Organizer: 22nd IAEA Fusion Energy Conference
  • Place of Presentation: Geneva
• [Presentation] Nonlinear dynamics of Collapse phenomena in heliotron plasma with large pressure gradient (2008)
  • Author(s): N.Mizuguchi, Y.Suzuki, N.Ohyabu
  • Organizer: 22nd IAEA Fusion Energy Conference
  • Place of Presentation: ジュネーブ
• [Presentation] ヘリカル系における圧力崩壊過程の非線形シミュレーション (2008)
  • Author(s): 水口直紀
  • Organizer: プラズマ・核融合学会第25回年会
  • Place of Presentation: 宇都宮
• [Presentation] Nonlinear Dynamics of Collapse Phenomena in Heliotron Plasma with Large Pressure Gradient (2008)
  • Author(s): N. Mizuguchi
  • Organizer: 2nd IAEA Fusion Energy Conference
  • Place of Presentation: ジュネーブ(スイス)
• [Remarks] ホームページ(成果発表資料、論文へのリンク等を掲載)
  • URL: http://www.nifs.ac.jp/fts/mizu/