Observation of Zonal Flow Type Oscillation in Linear Cylindrical ECR Plasmas

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概要

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• 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.

著者

• Yamada Takuma

  Graduate School Of Frontier Science University Of Tokyo

• Nagashima Yoshihiko

  Graduate School Of Frontier Sciences The Univ. Of Tokyo

• Kawai Yoshinobu

  Interdiciplinary Gradate School Of Engineering Sciences Kyushu University

• Fujisawa Akihide

  National Institute For Fusion Science

• Shinohara Shunjiro

  Interdisciplinary Graduate School Of Engineering Science Kyushu University

• Itoh Sanae

  Research Institute For Applied Mechanics Kyushu University

• Inagaki Shigeru

  Research Institute For Applied Mechanics Kyushu University

• Yagi Masatoshi

  Research Instittue For Applied Mechanics Kyushu University

• Itoh Kimitaka

  National Inst. For Fusion Sci. Gifu

• Yamada Takuma

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

• KAMATAKI Kunihiro

  Interdisciplinary Graduate School of Engineering Science, Kyushu University

• KAMATAKI Kunihiro

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

• NAGASHIMA Yoshihiko

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

• SHINOHARA Shunjiro

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

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