Study of Edge Plasma Characteristics at H-mode Transition in Heliotron J

• WATANABE S.

  Graduate School of Energy Science, Kyoto University, Uji 611-0011, Japan

• NAGASAKI K.

  Institute of Advanced Energy, Kyoto University, Uji 611-0011, Japan

• MIZUUCHI T.

  Institute of Advanced Energy, Kyoto University, Uji 611-0011, Japan

• KOBAYASHI S.

  Institute of Advanced Energy, Kyoto University, Uji 611-0011, Japan

• OKADA H.

  Institute of Advanced Energy, Kyoto University, Uji 611-0011, Japan

• KONDO K.

  Graduate School of Energy Science, Kyoto University, Uji 611-0011, Japan

• YAMAMOTO S.

  Graduate School of Engineering, Osaka University, Suita 565-0871, Japan

• TORII Y.

  High Temperature Plasma Center, The University of Tokyo, Kashiwa 277-8568, Japan

• KANEKO M.

  National Institute for Fusion Science, Toki 509-5292, Japan

• ARIMOTO H.

  Graduate School of Energy Science, Kyoto University, Uji 611-0011, Japan

• MOTOJIMA G.

  Graduate School of Energy Science, Kyoto University, Uji 611-0011, Japan

• FENG Z.

  Southwestern Institute of Physics, Chengdu 610041, China

• NOSAKU M.

  Graduate School of Energy Science, Kyoto University, Uji 611-0011, Japan

• TOMOKIYO T.

  Graduate School of Energy Science, Kyoto University, Uji 611-0011, Japan

• MATSUOKA S.

  Graduate School of Energy Science, Kyoto University, Uji 611-0011, Japan

• SANO F.

  Institute of Advanced Energy, Kyoto University, Uji 611-0011, Japan

抄録

Characteristics of spontaneous transition to a high confinement mode (H-mode) have been studied in a helical-axis heliotron device, Heliotron J. The radiation profile measured with a silicon photodiode array shows that a interesting change in the profile occurs at the plasma edge region in the transition phase, forming a strong gradient near the last closed flux surface (LCFS). Relating to the transition, characteristics of bursty density and particle-flux fluctuations current in the scrape off layer (SOL) have been investigated. The probability distribution function for the fluctuations has a tail structure in the L-mode phase, while the tail is suppressed and its direction is reversed after the transition, which may be related to the suppression of edge-plasma turbulence.

収録刊行物

• Plasma and Fusion Research

  Plasma and Fusion Research 2 S1059-S1059, 2007

  一般社団法人 プラズマ・核融合学会

キーワード

• Heliotron J
• H-mode transition
• radiation profile
• edge plasma turbulence
• PDF

詳細情報

• CRID: 1390282680232185472
• NII論文ID: 130002058948
• DOI: 10.1585/pfr.2.s1059
• ISSN: 18806821
• Web Site: http://www.jstage.jst.go.jp/article/pfr/2/0/2_0_S1059/_pdf
• 本文言語コード: en
• データソース種別:
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  • Crossref
  • CiNii Articles
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• 抄録ライセンスフラグ: 使用不可