A kinetic-magnetohydrodynamic model for low-frequency phenomena

Details A kinetic-magnetohydrodynamic model for low-frequency phenomena A kinetic-magnetohydrodynamic model for low-frequency phenomena

Dec 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991jgr....9621159c&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 96, Dec. 1, 1991, p. 21,159-21,171.

Physics

36

Collisionless Plasmas, Kinetic Theory, Low Frequencies, Magnetohydrodynamic Waves, Anisotropic Media, Eigenvalues, Kinetic Equations

Scientific paper

This study presents a hybrid kinetic-MHD model for describing LF phenomena in high-beta anisotropic plasmas that consist of two components: a low-energy core component and an energetic component with low density. The model treats the low-energy core component by magnetohydrodynamic description, the energetic component by a kinetic approach such as the gyrokinetic equations, and the coupling between the dynamics of these two components through plasma pressure in the momentum equation. In the linearized limit, two coupled eigenmode equations for describing the coupling between the transverse Alfven type and the compressional Alfven-type waves are derived. A procedure for determining the stability of a marginally stable MHD wave due to wave-particle resonances is presented.

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