Electrostatic instabilities induced by large-amplitude left-hand polarized waves

Details Electrostatic instabilities induced by large-amplitude left-hand polarized waves Electrostatic instabilities induced by large-amplitude left-hand polarized waves

Jul 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004jgra..10907108g&link_type=abstract

Journal of Geophysical Research, Volume 109, Issue A7, CiteID A07108

Physics

Plasma Physics

10

Space Plasma Physics: Wave/Particle Interactions, Space Plasma Physics: Waves And Instabilities, Space Plasma Physics: Wave/Wave Interactions, Space Plasma Physics: Nonlinear Phenomena

Scientific paper

We study the effect of a large-amplitude left-hand polarized wave on ion acoustic instabilities. We show that the presence of a finite amplitude left-hand polarized wave produces electrostatic instabilities above a threshold amplitude. These instabilities occur when the phase velocities of the counter-streaming ion acoustic waves become equal, due to the action of the nonlinear wave. They do not exist in the absence of large-amplitude waves. We examine their growth rates and threshold amplitude behavior as a function of the beam speed, temperature, and large-amplitude wave frequency.

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