Nonlinear Mode Couplings in a Cylindrical Magnetized Plasma

• YAMADA Takuma

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

• ITOH Sanae-I.

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

• INAGAKI Shigeru

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

• NAGASHIMA Yoshihiko

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

• SHINOHARA Shunjiro

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

• KASUYA Naohiro

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

• TERASAKA Kenichiro

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

• KAMATAKI Kunihiro

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

• ARAKAWA Hiroyuki

  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

• FUJISAWA Akihide

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

• ITOH Kimitaka

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

抄録

Nonlinear mode couplings in plasma turbulence generate mesoscale global structures, such as zonal flows and streamers. A streamer is a poloidally localized structure that is radially elongated. In the Large Mirror Device-Upgrade, a streamer structure was observed in the ion saturation-current fluctuation measured with a 64-channel poloidal Langmuir probe array. The bunching of waves was poloidally localized and rotated slowly in the ion diamagnetic direction. The frequency and poloidal mode number of its envelope corresponded to one particular mode, which was strongly coupled with many other modes. By calculating the radial biphase profile of three pronounced modes, including the particular mode, the streamer structure was confirmed to be radially elongated.

収録刊行物

• Plasma and Fusion Research

  Plasma and Fusion Research 5 S2016-S2016, 2010

  一般社団法人 プラズマ・核融合学会

キーワード

• linear plasma
• turbulence
• nonlinear coupling
• streamer
• bispectral analysis

詳細情報

• CRID: 1390282680230659840
• NII論文ID: 130000669006
• DOI: 10.1585/pfr.5.s2016
• ISSN: 18806821
• Web Site: http://www.jstage.jst.go.jp/article/pfr/5/0/5_0_S2016/_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