Coexistence of Collisional Drift and Flute Wave Instabilities in Bounded Linear ECR Plasma

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Author(s)

Abstract

This paper reports the experimental and theoretical investigation on the coexistence of the collisional drift and flute wave instabilities in the bounded linear electron cyclotron resonance (ECR) plasma. The drift wave instability is excited by the steep density gradient and imposed axial boundary conditions in the device. The flute instability is excited by the bad curvature of the magnetic field. Emphasis is made on the effect of the ion-neutral (i-n) particle collisions. It is observed that the drift wave instability is excited when the i-n particle collision frequency ν_<in> is low, but it is stabilized when ν_<in> is high. Furthermore, the drift and flute modes are coexistent for the intermediate values of ν_<in>. The Hasegawa-Wakatani model which describes the dispersion relation of the collisional drift-interchange mode is used for understanding the experimental observations. It is found that the experimentally observed drift frequency is consistent with the numerical calculation. The present result has shown that the i-n particle collisions play an important role in the stabilization of the collisional drift wave instability in the ECR plasma.

Journal

  • Journal of the Physical Society of Japan

    Journal of the Physical Society of Japan 76(5), "54501-1"-"54501-6", 2007-05-15

    The Physical Society of Japan (JPS)

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Codes

  • NII Article ID (NAID)
    110006273189
  • NII NACSIS-CAT ID (NCID)
    AA00704814
  • Text Lang
    ENG
  • Article Type
    ART
  • ISSN
    00319015
  • NDL Article ID
    8729142
  • NDL Source Classification
    ZM35(科学技術--物理学)
  • NDL Call No.
    Z53-A404
  • Data Source
    CJP  NDL  NII-ELS 
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