Observation of Zonal Flow Type Oscillation in Linear Cylindrical ECR Plasmas

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Author(s)

    • KAMATAKI Kunihiro
    • Interdisciplinary Graduate School of Engineering Science, Kyushu University, Kasuga, Fukuoka 816-8580, Japan
    • ITOH Kimitaka
    • National Institute for Fusion Science, Toki, Gifu 509-5292, 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

Abstract

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.

Journal

  • Plasma and Fusion Research

    Plasma and Fusion Research (3), 047-047, 2008

    The Japan Society of Plasma Science and Nuclear Fusion Research

Cited by:  1

Codes

  • NII Article ID (NAID)
    130000263929
  • Text Lang
    ENG
  • Article Type
    Journal Article
  • Data Source
    CJPref  J-STAGE 
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