On linear coupling of acoustic and cyclotron waves in plasma flows

Details On linear coupling of acoustic and cyclotron waves in plasma flows On linear coupling of acoustic and cyclotron waves in plasma flows

2004-11-26

arxiv.org/abs/physics/0411235v1

Physics

Plasma Physics

5 pages, no figures. Submitted to "Physics of Plasmas"

Scientific paper

10.1063/1.1886827

It is found that in magnetized electrostatic plasma flows the velocity shear couples ion-acoustic waves with ion-cyclotron waves and leads, under favorable conditions, to their efficient reciprocal transformations. It is shown that in a two-dimensional setup this coupling has a remarkable feature: it is governed by equations that are exactly similar to the ones describing coupling of sound waves with internal gravity waves [Rogava & Mahajan: Phys. Rev. E vol.55, 1185 (1997)] in neutral fluid flows. Using another noteworthy quantum mechanical analogy we calculate transformation coefficients and give fully analytic, quantitative description of the coupling efficiency for flows with low shearing rates.

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