Experimental Study of Drift Wave Turbulence in Linear Plasmas

• YAMADA Takuma

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

• ITOH Sanae -I.

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

• MARUTA Takashi

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

• KASUYA Naohiro

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

• SHINOHARA Shunjiro

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

• NAGASHIMA Yoshihiko

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

• YAGI Masatoshi

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

• TERASAKA Kenichiro

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

• INAGAKI Shigeru

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

• KAWAI Yoshinobu

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

• FUKAO Masayuki

  Myojocho, Uji 611-0014, Japan

• FUJISAWA Akihide

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

• ITOH Kimitaka

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

抄録

Linear plasmas allow multi-point, low-temperature measurements with Langmuir probes. We measured ion saturation-current fluctuations of a Large Mirror Device-Upgrade linear plasma using a poloidal Langmuir probe array. By varying the discharge conditions, the spatiotemporal behavior showed a change from a coherent sine wave to a turbulent waveform through a periodic, modulated sine wave. The two-dimensional (poloidal wave number and frequency) power spectrum for each regime showed a single fluctuation peak, a peak and its harmonics, and a number of peaks in the poloidal wave number-frequency space. Bi-spectral analysis was performed for the turbulent regime, and showed the existence of nonlinear couplings among fluctuation peaks and broadband components.

収録刊行物

• Plasma and Fusion Research

  Plasma and Fusion Research 3 044-044, 2008

  一般社団法人 プラズマ・核融合学会

キーワード

• linear plasma
• drift wave
• turbulence
• broadband fluctuation
• bi-spectral analysis

詳細情報

• CRID: 1390001205254973440
• NII論文ID: 130000263926
• DOI: 10.1585/pfr.3.044
• ISSN: 18806821
• Web Site: http://www.jstage.jst.go.jp/article/pfr/3/0/3_0_044/_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