Neutralization process of an accelerated compact torus plasma for deep fuelling into a fusion plasma

2010 Fiscal Year Final Research Report

• Project/Area Number: 21760687
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Nuclear fusion studies
• Research Institution: Gunma University
• Principal Investigator: TAKAHASHI Toshiki Gunma University, 大学院・工学研究科, 准教授 (10302457)
• Project Period (FY): 2009 – 2010
• Keywords: 核融合 / 粒子供給 / コンパクトトーラス / モンテカルロシミュレーション / ハイブリッドシミュレーション

Research Abstract

New fuelling method using an accelerated compact torus (CT) plasma technique is proposed. Neutralization efficiency of a CT plasma in neutralizer filled with neutral gas is computed by a Monte-Carlo calculation. It is found that higher than 0.5-mTorr gas pressure is needed to generate a complete neutral flow within a 1-m length neutralizer. The electron temperature of the accelerated CT plasma reduces by ionization and excitation collisions between plasma electrons and neutral gas particles. Reduction of the electron temperature, however, never contributes to enhance the neutralization efficiency because of the low recombination rate.

Research Products

• [Journal Article] Monte Carlo Simulation on a Neutralization Process of an Accelerated Compact Torus Plasma, IEEE Trans. (2010)
  • Author(s): S.Fujii, T.Ohshima, T.Takahashi, N.Fukumoto, M.Nagata
  • Journal Title: Plasma Sci. 38 Pages: 1473-1477
  • Peer Reviewed
• [Presentation] SPICA装置を用いた高速CTプラズマの中性粒子フロー化とその定量的評価 (2010)
  • Author(s): 福本直之, 宮澤順一, 後藤基志, 高橋俊樹, 菊池祐介, 永田正義, 浅井朋彦, 政宗貞男, 山田弘司
  • Organizer: 第27回プラズマ・核融合学会年会
  • Place of Presentation: 北海道大学学術交流会館(札幌)
  • Year and Date: 2010-12-30
• [Presentation] Development of a neutral particle flow fueling system by using a compact torus plasma injector for LHD (2010)
  • Author(s): N.Fukumoto, J.Miyazawa, T.Takahashi, M.Nagata, M.Goto, T.Asai, S.Masamune, Y.Kikuchi, H.Yamada
  • Organizer: 23^<rd> IAEA Fusion Energy Conference
  • Place of Presentation: Daejeon, Korea.
  • Year and Date: 2010-10-12
• [Presentation] SPICA装置のCT生成加速部電源一段化と高速中性粒子フロー生成への応用 (2009)
  • Author(s): 福本直之, 宮澤順一, 菊池祐介, 永田正義, 高橋俊樹, 浅井朋彦, 高橋努, 政宗貞男, 三瓶明希夫, 井通暁, 入江克
  • Organizer: 第26回プラズマ・核融合学会年会
  • Place of Presentation: 京都市国際交流会館(京都)
  • Year and Date: 2009-12-04
• [Presentation] Effects of the recombination reaction on a neutralization process of an accelerated compact torus plasma (2009)
  • Author(s): T.Ohshima, T.Takahashi, N.Fukumoto, M.Nagata
  • Organizer: The 7th General Scientific Assembly of the Asia Plasma and Fusion Association and the Asia-Pacific Plasma Theory Conference
  • Place of Presentation: Aomori, Japan.
  • Year and Date: 2009-10-27
• [Presentation] Monte-Carlo simulation on a neutralization process of an accelerated compact torus plasma (2009)
  • Author(s): S.Fujii, T.Ohshima, T.Takahashi, N.Fukumoto, M.Nagata
  • Organizer: 21st International Conference on Numerical Simulation of Plasmas 2009
  • Place of Presentation: Lisbon, Portugal.
  • Year and Date: 2009-10-06
• [Remarks] ホームページ等
  • URL: http://www.el.gunma-u.ac.jp/~eedl/