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Title: Electromagnetic drift waves dispersion for arbitrarily collisional plasmas

The impacts of the electromagnetic effects on resistive and collisionless drift waves are studied. A local linear analysis on an electromagnetic drift-kinetic equation with Bhatnagar-Gross-Krook-like collision operator demonstrates that the model is valid for describing linear growth rates of drift wave instabilities in a wide range of plasma parameters showing convergence to reference models for limiting cases. The wave-particle interactions drive collisionless drift-Alfvén wave instability in low collisionality and high beta plasma regime. The Landau resonance effects not only excite collisionless drift wave modes but also suppress high frequency electron inertia modes observed from an electromagnetic fluid model in collisionless and low beta regime. Considering ion temperature effects, it is found that the impact of finite Larmor radius effects significantly reduces the growth rate of the drift-Alfvén wave instability with synergistic effects of high beta stabilization and Landau resonance.
Authors:
;  [1] ;  [2]
  1. Department of Mechanical and Aerospace Engineering, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093 (United States)
  2. Naval Research Laboratory, 4555 Overlook Avenue, Washington, DC 20375 (United States)
Publication Date:
OSTI Identifier:
22490001
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 22; Journal Issue: 7; Other Information: (c) 2015 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; ALFVEN WAVES; COLLISIONAL PLASMA; COLLISIONLESS PLASMA; ELECTRONS; HIGH-BETA PLASMA; ION TEMPERATURE; KINETIC EQUATIONS; LANDAU FLUCTUATIONS; LARMOR RADIUS; PARTICLE INTERACTIONS; PLASMA DRIFT; PLASMA INSTABILITY; RESONANCE; WAVE PROPAGATION