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The effect of velocity space diffusion on the universal instability in a plasma

Published online by Cambridge University Press:  13 March 2009

R. S. B. Ong
Affiliation:
Graduate School of Aerospace Engineering, Cornell University, Ithaca, New York
M. Y. Yu
Affiliation:
Graduate School of Aerospace Engineering, Cornell University, Ithaca, New York

Abstract

The influence of collisions on the universal instability in a fully ionized in- homogeneous plasma is investigated by means of a simplified Fokker-Planck kinetic equation. For the Fokker-Planck model yields results qualitatively similar to the Bhatnagar-Gross-Krook model, but the two models give different collisional effects in the case where b ≥ 1. Further it is shown that collisions in general enhance the temperature gradient instability in a plasma when b ≪ 1 and reduce it when b ≥ 1.

Type
Research Article
Copyright
Copyright © Cambridge University Press 1970

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