Fluctuation Measurement Across the Broad Range of the Low-field Side Edge Plasmas in the TST-2 Spherical Tokamak
Fluctuation Measurement Across the Broad Range of the Low-field Side Edge Plasmas in the TST-2 Spherical Tokamak
カテゴリ: 論文誌(論文単位)
グループ名: 【A】基礎・材料・共通部門
発行日: 2012/07/01
タイトル(英語): Fluctuation Measurement Across the Broad Range of the Low-field Side Edge Plasmas in the TST-2 Spherical Tokamak
著者名: Masateru Sonehara (The University of Tokyo), Yoshihiko Nagashima (Kyushu University), Yuichi Takase (The University of Tokyo), Akira Ejiri (The University of Tokyo), Takashi Yamaguchi (The University of Tokyo), Takanori Ambo (The University of Tokyo), Hid
著者名(英語): Masateru Sonehara (The University of Tokyo), Yoshihiko Nagashima (Kyushu University), Yuichi Takase (The University of Tokyo), Akira Ejiri (The University of Tokyo), Takashi Yamaguchi (The University of Tokyo), Takanori Ambo (The University of Tokyo), Hidetoshi Kakuda (The University of Tokyo), Junichi Hiratsuka (The University of Tokyo), Takuya Sakamoto (The University of Tokyo), Ryota Shino (The University of Tokyo), Takuma Wakatsuki (The University of Tokyo), Osamu Watanabe (The University of Tokyo)
キーワード: turbulence,drift wave,Langmuir probe,bispectral analysis,nonlinear energy transfer
要約(英語): This paper presents initial results from experimental observation of edge turbulence structures in ohmically heated plasmas on Tokyo Spherical Tokamak-2 (TST-2). The experiment was conducted using two-dimensionally movable Langmuir probes. With monitoring floating potential Vf and ion saturation current Iis, the radial and poloidal structures of the edge turbulence are obtained. The high coherence in fluctuations at 10-100kHz frequency was observed by the use of the Langmuir probes 90° toroidally and ∼75° poloidally distant from each other, suggesting that the fluctuations have long range correlation along a magnetic field line. To investigate nonlinear structures of the turbulence, bispectral analysis was used, and the observed auto-bicoherence pattern suggests the presence of the coupling and energy transfer between different modes.
本誌: 電気学会論文誌A(基礎・材料・共通部門誌) Vol.132 No.7 (2012) 特集:The 16th International Workshop on Spherical Tori 2011
本誌掲載ページ: 499-504 p
原稿種別: 論文/英語
電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejfms/132/7/132_499/_article/-char/ja/
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