Observation of Intermittent Transition by Electrode Biasing in Heliotron J

• SHIMIZU Kosuke

  Department of Quantum Science and Energy Engineering, Tohoku University

• KITAJIMA Sumio

  Department of Quantum Science and Energy Engineering, Tohoku University

• OKAMOTO Atsushi

  Department of Quantum Science and Energy Engineering, Tohoku University

• SATO Yu

  Department of Quantum Science and Energy Engineering, Tohoku University

• TACHIBANA Jo

  Department of Quantum Science and Energy Engineering, Tohoku University

• OKU Toshihiro

  Department of Quantum Science and Energy Engineering, Tohoku University

• TAKAYAMA Masakazu

  Akita Prefectural University

• SANO Fumimichi

  Institute of Advanced Energy, Kyoto University

• MIZUUCHI Tohru

  Institute of Advanced Energy, Kyoto University

• NAGASAKI Kazunobu

  Institute of Advanced Energy, Kyoto University

• OKADA Hiroyuki

  Institute of Advanced Energy, Kyoto University

• KADO Shinichiro

  Institute of Advanced Energy, Kyoto University

• KOBAYASHI Shinji

  Institute of Advanced Energy, Kyoto University

• YAMAMOTO Satoshi

  Institute of Advanced Energy, Kyoto University

• OHSHIMA Shinsuke

  Institute of Advanced Energy, Kyoto University

• SUZUKI Yasuhiro

  National Institute for Fusion Science

• YOKOYAMA Masayuki

  National Institute for Fusion Science

• TAKAHASHI Hiromi

  National Institute for Fusion Science

抄録

We observed intermittent increases in the electrode current in electrode biasing experiments in Heliotron J. In addition, electron density and floating potential showed pulsating behavior associated with the electrode current. The relation between line density and electrode current and that between floating potential and electrode current showed a hysteresis feature in transitions. Then it is evident that the pulsating behavior was the intermittent transition between two distinctive states. We also observed the mode (∼10 kHz) that accompanied the pulsating behavior in the power spectrum density of the floating potential and ion saturation current obtained via fast Fourier transform. The electron density gradient increased, and subsequently the power spectrum density of the fluctuation increased.

収録刊行物

• Plasma and Fusion Research

  Plasma and Fusion Research 10 (0), 3402061-3402061, 2015

  一般社団法人 プラズマ・核融合学会

キーワード

• stellarator
• heliotron
• electrode biasing
• H-mode transition
• turbulent transport
• pulsation

詳細情報

• CRID: 1390001205254710400
• NII論文ID: 130005302891
• DOI: 10.1585/pfr.10.3402061
• ISSN: 18806821
• Web Site: https://www.jstage.jst.go.jp/article/pfr/10/0/10_3402061/_pdf
• 本文言語コード: en
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可