Acceleration of electrons in the ionosphere under the action of intense radio-waves near electron cyclotron harmonics

Physics

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Backscattering, Electron Acceleration, Harmonic Radiation, Ionospheric Electron Density, Plasma Turbulence, Diffusion Coefficient, Electron Cyclotron Heating, Gyrofrequency, Plasma Waves

Scientific paper

The effect of electron acceleration by intense ionospheric plasma turbulence induced by a high-power radio wave is studied theoretically, under conditions when the turbulence frequency is nearly equal to harmonics of the electron-cyclotron frequency. The turbulence located in a thin layer at the region of the pump-wave upper-hybrid resonance gives rise to the formation of an intense electron distribution-function tail at high energies. Given the resonantly absorbed fraction of the pump-wave energy and the typical plasma turbulence scale, one can estimate the turbulence energy density and calculate the modified electron distribution function.

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