Collisional energy transfer in two-component plasmas

Details Collisional energy transfer in two-component plasmas Collisional energy transfer in two-component plasmas

2008-08-18

arxiv.org/abs/0808.2369v1

Physics

Plasma Physics

Scientific paper

10.1063/1.2977987

The friction in plasmas consisting of two species with different temperatures is discussed together with the consequent energy transfer. It is shown that the friction between the two species has no effect on the ion acoustic mode in a quasi-neutral plasma. Using the Poisson equation instead of the quasi-neutrality reveals the possibility for an instability driven by the collisional energy transfer. However, the different starting temperatures of the two species imply an evolving equilibrium. It is shown that the relaxation time of the equilibrium electron-ion plasma is, in fact, always shorter than the growth rate time, and the instability can thus never effectively take place. The results obtained here should contribute to the definite clarification of some contradictory results obtained in the past.

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