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Title: Dispersion and damping rates of dispersive Alfvén wave in a nonextensive plasma

The dispersion and landau damping of the dispersive Alfvén waves (DAW) have been studied in the plasma with nonextensive electrons and ions. The conditions for the existence of inertial Alfvén waves (IAW) and kinetic Alfvén waves (KAW) are modified by electrons' nonextensive parameter q{sub e}. For IAW, β{sub q} ≪ m{sub e}/m{sub i}; for KAW, m{sub e}/m{sub i} ≪ β{sub q} ≪ 1, β{sub q} is the ratio of the effective thermal pressure to the magnetic pressure. In the plasma with superthermal particles, the frequency of the IAW and KAW will increase with the increase of q{sub e} when the effective temperature of the plasma systems keeps invariant. Whereas the damping rates of the IAW and KAW vary inversely with respect to q{sub e} for the reason that the phase velocity of KAW is much smaller than the effective thermal velocity, while the phase velocity of IAW is much bigger than the effective thermal velocity.
Authors:
; ;  [1] ;  [2]
  1. School of Sciences, Nantong University, Nantong 226019 (China)
  2. School of Sciences, Nanchang University, Nanchang 330047 (China)
Publication Date:
OSTI Identifier:
22252195
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 21; Journal Issue: 3; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ELECTRONS; LANDAU DAMPING; PHASE VELOCITY; PLASMA