Generation of kinetic Alfven waves in a cosmic plasma

1Yukhimuk, AK, 2Fedun, VN, 3Voitsekhovska, AD, 4Cheremnykh, OK
1Main Astronomical Observatory of the National Academy of Sciences of Ukraine, Kyiv, Ukraine
2Taras Shevchenko National University of Kyiv, Kyiv, Ukraine
3Main Astronomical Observatory of the NAS of Ukraine, Kyiv, Ukraine
4Space Research Institute of the National Academy of Sciences of Ukraine and the State Space Agency of Ukraine, Kyiv, Ukraine
Kosm. nauka tehnol. 2002, 8 ;(Supplement2):228-236
Publication Language: Russian
Abstract: 
A nonlinear mechanism for the transformation of Alfven–MHD waves into kinetic Alfven waves in a homogeneous magnetized plasma with a small plasma parameter β <<1 is proposed. A parametric instability is considered as a generation mechanism, where the magnetohydrodynamic Alfvén wave is the pump wave. Based on two-fluid magnetic hydrodynamics and the Vlasov equation, a nonlinear dispersion equation describing three-wave interaction is obtained. An increment, time, and threshold for the development of instability were found. It is shown that the considered nonlinear process is effective in the solar corona.
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