Quasihydrodynamic description of ion acoustic waves in a collisional plasma

Journal Article · Mon Aug 01 04:00:00 EDT 1994 · Physics of Plasmas; (United States)

DOI:https://doi.org/10.1063/1.870570· OSTI ID:6686683

Bychenkov, V Y; Myatt, J; Rozmus, W; Tikhonchuk, V T ^[1]

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1. Department of Physics, University of Alberta, Edmonton, Alberta T6G 2J1 (Canada)

A quasihydrodynamic description of ion acoustic waves (IAW) has been developed in the entire range of particle collisionality. It is shown that a frequency dependent 21-moment Grad closure to ion fluid equations and phenomenological delocalized electron heat transport formulation can be used for an accurate analytical description of ion acoustic wave dispersion and damping. This description is in good agreement with the results of Fokker--Planck simulations. The authors' new model has been derived with the practical motivation of improving IAW description in large scale numerical modeling of ion wave instabilities. This theory has been also applied to the linear analysis of heat flux driven plasma instabilities. In particular, a new IAW instability in the regime of collisional electrons, which is induced by the density dependence of the electron thermal transport coefficient, has been found.

• OSTI ID: 6686683
• Journal Information: Physics of Plasmas; (United States), Journal Name: Physics of Plasmas; (United States) Vol. 1:8; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700340* -- Plasma Waves
Oscillations
& Instabilities-- (1992-)
CALCULATION METHODS
COLLISIONAL PLASMA
EQUATIONS
FLUID MECHANICS
HEAT FLUX
HYDRODYNAMICS
ION ACOUSTIC WAVES
ION WAVES
KINETIC EQUATIONS
MECHANICS
MOMENTS METHOD
PLASMA
PLASMA WAVES
TRANSPORT THEORY