Generation of kinetic Alfven waves in a cosmic plasma
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| 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 |
| https://doi.org/10.15407/knit2002.02s.228 |
| 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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