Nonlinear mechanism of electromagnetic radiation generation in cosmic plasma
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| 1Yukhimuk, AK, 2Yukhimuk, VA, 3Fal'ko, OG 1Main Astronomical Observatory of the National Academy of Sciences of Ukraine, Kyiv, Ukraine 2Taras Shevchenko National University of Kyiv, Kyiv, Ukraine; Newcastle University , Newcastle, Australia 3Taras Shevchenko National University of Kyiv, Kyiv, Ukraine |
| Kosm. nauka tehnol. 1995, 1 ;(2):65–71 |
| https://doi.org/10.15407/knit1995.02.065 |
| Publication Language: Russian |
Abstract: Parametric three-wave interaction of upper hybrid waves with kinetic Alfve'n waves and electromagnetic waves (along and across the ambient magnetic field) is studied using two-fluid MHD. A nonlinear dispersion equation for the coupling waves and the growth rate of the parametric instability are found. We use our theoretical results for explaining observations of satellites in the magnetosphere. It is shown that electromagnetic waves both along and across the ambient magnetic fields can be generated as a result of the upper hybrid wave decay instability. It is also shown that the left-mode electromagnetic wave will be generated more efficiently than the ordinary electromagnetic wave. These parametric processes can also occur during solar flashes and in the magnetosphere of Jupiter ій плазмі. Показано, що в результаті розпаду верхневогібридної хвилі генеруються електромагнітні хвилі, що поширюються як уздовж, так і поперек зовнішнього магнітного поля. При цьому інкремент розвитку нестійкості в разі генерації лівополяризованій електромагнітній хвилі значно вище, ніж в разі генерації звичайної електромагнітної хвилі. Розглянуті в роботі нелінійні параметричні процеси можуть мати місце також на Сонці під час потужних спалахів, а також в магнітосфері Юпітера
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| Keywords: cosmic plasma, electromagnetic wave |
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