Generation of kinetic Alfvén waves by a pumping lower hybrid wave.

Details Generation of kinetic Alfvén waves by a pumping lower hybrid wave. Generation of kinetic Alfvén waves by a pumping lower hybrid wave.

Apr 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999kfnt...15..103f&link_type=abstract

Kinematika Fiz. Nebesn. Tel, Tom 15, No. 2, p. 103 - 109

Physics

Plasma: Alfven Waves, Magnetohydrodynamics: Alfven Waves

Scientific paper

A new nonlinear mechanism of the generation of kinetic Alfvén waves and lower hybrid waves in magnetized plasmas is investigated. As the generation mechanism, the parametric instability where the lower hybrid wave is the pumping wave is considered. Two-fluid magnetohydrodynamics is used to describe nonlinear parametric interaction of the waves. A nonlinear dispersion equation for the coupling of lower hybrid and kinetic Alfvén waves is derived. The authors determined also the instability growth rate γ. The kinetic effects in the Alfvén waves (a finite Larmour radius of ions) are shown to be essential in the parametric interaction of waves. The results have been used for analyzing experimental data for cosmic plasmas.

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