Observation of Zonal Flow Type Oscillation in Linear Cylindrical ECR Plasmas

• KAMATAKI Kunihiro

  Interdisciplinary Graduate School of Engineering Science, Kyushu University, Kasuga, Fukuoka 816-8580, Japan

• ITOH Sanae -I.

  Research Institute for Applied Mechanics, Kyushu University, Kasuga, Fukuoka 816-8580, Japan

• NAGASHIMA Yoshihiko

  Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa, Chiba 277-8561, Japan

• INAGAKI Shigeru

  Research Institute for Applied Mechanics, Kyushu University, Kasuga, Fukuoka 816-8580, Japan

• SHINOHARA Shunjiro

  Interdisciplinary Graduate School of Engineering Science, Kyushu University, Kasuga, Fukuoka 816-8580, Japan

• YAGI Masatoshi

  Research Institute for Applied Mechanics, Kyushu University, Kasuga, Fukuoka 816-8580, Japan

• YAMADA Takuma

  Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa, Chiba 277-8561, Japan

• KAWAI Yoshinobu

  Interdisciplinary Graduate School of Engineering Science, Kyushu University, Kasuga, Fukuoka 816-8580, Japan

• FUJISAWA Akihide

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

• ITOH Kimitaka

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

抄録

Zonal flow type oscillation, which is driven by a small modulation of the electron cyclotron resonance (ECR) power in a low-frequency band (< 0.1 kHz), and its impact on drift wave turbulence are observed in linear cylindrical ECR plasmas by simultaneous spatiotemporal measurements with a multi-ring probe array. It is found that a potential low-frequency (< 0.1 kHz) oscillation can have a zonal flow type structure. Bicoherence analysis reveals that this zonal flow type oscillation has a nonlinear interaction with the drift mode. These results indicate that an electric field with zonal flow, which is excited externally, can modulate the drift mode amplitude, similar to spontaneous zonal flow.

収録刊行物

• Plasma and Fusion Research

  Plasma and Fusion Research 3 047-047, 2008

  一般社団法人 プラズマ・核融合学会

キーワード

• zonal flow type oscillation
• drift wave turbulence
• ECR modulation
• linear cylindrical ECR plasma

詳細情報

• CRID: 1390282680231674624
• NII論文ID: 130000263929
• DOI: 10.1585/pfr.3.047
• ISSN: 18806821
• Web Site: http://www.jstage.jst.go.jp/article/pfr/3/0/3_0_047/_pdf
• 本文言語コード: en
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