ACCELERATION OF ELECTRONS IN THE IONOSPHERE UNDER THE ACTION OF INTENSE RADIO-WAVES NEAR ELECTRON-CYCLOTRON HARMONICS

The effect of electron acceleration by intense ionospheric plasma turb ulence induced by a high-power radio wave is studied theoretically, un der conditions when the turbulence frequency is nearly equal to harmon ics of the electron-cyclotron frequency. The turbulence located in a t hin layer at the region of the pump-wave upper-hybrid resonance gives rise to the formation of an intense electron distribution-function tai l 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 dis tribution function.