Generation of electromagnetic radiation by an upper hybrid pumping wave in a magnetized plasma

1Yukhimuk, AK, 2Fedun, VN, 3Yukhimuk, VA, 2Fal'ko, OG
1Main Astronomical Observatory of the National Academy of Sciences of Ukraine, Kyiv, Ukraine
2Taras Shevchenko National University of Kyiv, Kyiv, Ukraine
3Taras Shevchenko National University of Kyiv, Kyiv, Ukraine; Newcastle University , Newcastle, Australia
Kosm. nauka tehnol. 1998, 4 ;(1):102–107
Section: Space and Atmospheric Physics
Publication Language: Russian
We discuss a nonlinear mechanism for the generation of electromagnetic radiation in a magnetized plasma with a low plasma parameter β . Two-fluid magnetohydrodynamics is used to describe the decay of an upper hybrid pumping wave into a left polarized (ordinary) electromagnetic wave and a kinetic Alfven wave. We found the instability growth rates у which are proportional to electron inertial length (ae = c/ωpe). Therefore, this process is possible only if one takes the electron inertia for Alfven waves into account. The left polarased wave generation occur much faster than the generation of the ordinary wave. The nonlinear processes discussed in this study can occur in the upper ionosphere and the magnetosphere where the plasma parameter β is low.
Keywords: electromagnetic radiation, nonlinear processes, plasma
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