Transformation of the MHD Alfven waves in space plasma

Details Transformation of the MHD Alfven waves in space plasma Transformation of the MHD Alfven waves in space plasma

Oct 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002kfnt...18..441y&link_type=abstract

Kinematika i Fizika Nebesnykh Tel, vol. 18, no. 5, p. 441-449.

Physics

Scientific paper

A nonlinear mechanism of the transformation of a MHD Alfven wave to a kinetic Alfven wave (KAW) in the homogeneous magnetized plasma with small plasma parameter β << 1 is proposed. As the generation mechanism, the parametric instability where the MHD Alfven wave is the pumping wave is considered. A nonlinear dispersion equation describing the three-wave interaction is obtained on the basis of the two-fluid magnetohydrodynamics and Vlasov equation. We also determined the instability growth rate, the time and the threshold of instability development. The nonlinear process considered in this study is shown to be effective in the solar corona.

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