Electrostatic electron cyclotron wave induced pitch angle diffusion of electrons

183-187The resonant interaction of electrons with electrostatic waves of frequencies 1.5 ωce and 2.5 ωce outside the plasmapause at L= 4 has been considered. and adopting a model for the electrostatic wave energy. its contribution towards the change in pitch angle of resonant electrons has been estimated. The fluxes of electrons precipitating into lower ionosphere, as a consequence of pitch angle diffusion and energy associated with them, have been computed and their variations with the electrostatic wave amplitudes have been studied. Both the frequency and the amplitude of electrostatic spectrum are found to control the pitch angle diffusion and consequent precipitation of electrons through the loss cone. For electrostatic wave amplitudes selected in the range of observations the precipitating electron fluxes are found comparable with those induced by the whistler mode waves. The role of the nature of interacting electron distributions in controlling the precipitating particle and energy fluxes has heen discussed