Observation of Competition between Drift Instability and Flute Instability in a Bounded Linear ECR Plasma

• KAMATAKI Kunihiro

  Interdisciplinary Graduate School of Engineering Science, Kyushu University

• NAGASHIMA Yoshihiko

  Research Institute for Applied Mechanics, Kyushu University

• SHINOHARA Shunjiro

  Interdisciplinary Graduate School of Engineering Science, Kyushu University

• KAWAI Yoshinobu

  Research Institute for Applied Mechanics, Kyushu University

• INAGAKI Sigeru

  Research Institute for Applied Mechanics, Kyushu University

• YAGI Masatoshi

  Research Institute for Applied Mechanics, Kyushu University

• ITOH Kimitaka

  National Institute for Fusion Science

• ITOH Sanae-I.

  Research Institute for Applied Mechanics, Kyushu University

Abstract

Competition behavior between the drift instability and the flute instability has been investigated experimentally in a bounded linear electron cyclotron resonance (ECR) plasma. Time evolutions of the fluctuation in ion saturation currents clearly show the successive appearance of the two instabilities. The drift instability is excited first, then the flute instability appears along with the suppression of the drift instability, and finally, both fluctuations are stabilized. The cyclic competition process in these instabilities continues periodically, and is closely related to the radial density profile.

Journal

• Plasma and Fusion Research

  Plasma and Fusion Research 2 034-034, 2007

  The Japan Society of Plasma Science and Nuclear Fusion Research

Keywords

• drift wave
• flute wave
• turbulence
• ECR plasma

Details

• CRID: 1390282680231689088
• NII Article ID: 130002058871
• DOI: 10.1585/pfr.2.034
• ISSN: 18806821
• Web Site: http://www.jstage.jst.go.jp/article/pfr/2/0/2_0_034/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed