NDLI: A macro-kinetic description of parametric instabilities

Content Provider	IEEE Xplore Digital Library
Author	Huang, J. Kuo, S.P.
Copyright Year	1996
Description	Author affiliation: Weber Res. Inst., Polytechnic Univ., Farmingdale, NY, USA (Huang, J.)
Abstract	Summary form only given. Parametric instability is a very important phenomenon in the study of nonlinear plasma physics. The instability can be analyzed either within the framework of fluid or kinetic equations. The former reveals a clear physical picture of the coupling processes (beating current, ponderomotive and thermal pressure forces) involved, and the analysis is usually less complicated. The latter requires more extensive analytical work (especially in the magnetized plasma case), but its result also contains the kinetic effect of the plasma that is lost in the fluid approach. Therefore, a hybrid approach which takes the advantages of both approaches is desirable. A difficulty in the formulation of a rigorous hybrid approach is that, in the analysis of parametric instabilities, the nonlinear terms (beating current and ponderomotive force) in the fluid equations have their common root ascribed to the convective term (v/spl middot//spl nabla/f) of the Vlasov equation, while it is the E/spl middot//spl nabla//sub v/f term that provides the nonlinear coupling in the kinetic analysis. In the present work, a moment expansion procedure is applied to the perturbed distribution function in the nonlinear coupling term in the kinetic analysis of parametric instabilities. Since the proposed theory incorporates fluid variables into the kinetic framework, it is termed macro-kinetic theory (MKT). This macro-kinetic formulation is, in principal, exact if all the moments in the expansion are taken into account. Moreover, the fluid description for parametric coupling can be retrieved from the kinetic framework. Therefore, the macro-kinetic coupling terms contain fluid insights as well as the kinetic information, while greatly simplify the kinetic analysis of parametric instabilities.
File Size	93888
File Format	PDF
ISBN	0780333225
ISSN	07309244
DOI	10.1109/PLASMA.1996.551531
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1996-06-03
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Kinetic theory Magnetic analysis Plasma applications Plasma devices Nonlinear equations Ionization Plasma sources Physics Couplings Plasma waves
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Condensed Matter Physics Electrical and Electronic Engineering

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