The 'drift dissipative instability' - A critique

Details The 'drift dissipative instability' - A critique The 'drift dissipative instability' - A critique

Aug 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984jatp...46..685g&link_type=abstract

Journal of Atmospheric and Terrestrial Physics (ISSN 0021-9169), vol. 46, Aug. 1984, p. 685-687. Research sponsored by the U.S.

Physics

Collisional Plasmas, Electrostatic Waves, Ionospheric Disturbances, Ionospheric Drift, Magnetohydrodynamic Stability, Plasma Drift, Collision Rates, Ionospheric Electron Density, Kinetic Theory, Wave Dispersion

Scientific paper

This paper is a critique of Kadomtsev' fluid dispersion equation for electrostatic drift instabilities in a plasma with weak BGK charged-neutral collisions. The numerical solution of this equation is compared with the solution of a more exact kinetic dispersion equation. At maximum growth rate, the fluid results do not correspond to the kinetic results in either the collisionless or the collision-dominated limits. Thus in the BGK model of charged-neutral collisions, the 'drift dissipative instability' is not a distinct mode, but only an approximation to the universal density drift instability in a limited range of parameter space.

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