Spatiotemporal Behavior of Drift Waves in LMD-U

• 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

• TERASAKA Kenichiro

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

• KASUYA Naohiro

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

• NAGASHIMA Yoshihiko

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

• SHINOHARA Shunjiro

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

• MARUTA Takashi

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

• YAGI Masatoshi

  Research Institute for Applied Mechanics, 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

• FUJISAWA Akihide

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

• ITOH Kimitaka

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

抄録

In the LMD-U linear magnetized plasma, fluctuation measurements have been performed with multi-channel poloidal Langmuir probe arrays to investigate the spatiotemporal behaviors of drift wave turbulence. Two-dimensional (poloidal mode number-frequency) power spectrum showed not only fluctuation peaks but also the existence of a broadband fluctuation. The broadband fluctuation developed at high poloidal mode number and high frequency regions and not along the linear dispersion relation curve of drift wave modes. It showed shorter correlation time and poloidal length than the peaked fluctuations. Two-dimensional axial coherence was measured with two poloidal probe arrays separated in the axial direction. The axial coherence was strong for both the broadband fluctuation and peak fluctuations, suggesting the quasi-two-dimensional structure of the drift wave turbulence.

収録刊行物

• Plasma and Fusion Research

  Plasma and Fusion Research 3 S1021-S1021, 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
• quasi-two-dimensional structure

詳細情報

• CRID: 1390001205253301120
• NII論文ID: 130000263966
• DOI: 10.1585/pfr.3.s1021
• ISSN: 18806821
• Web Site: http://www.jstage.jst.go.jp/article/pfr/3/0/3_0_S1021/_pdf
• 本文言語コード: en
• データソース種別:
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  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可