ROLE OF OBLIQUE WHISTLER-NODE WAVES IN ENERGETIC ELECTRON PRECIPITATION AT THE LOWER EDGE OF INNER RADIATION BELT

摘要

An attempt has been made to study the precipitation of energetic (keV and MeV) electrons at the lower edge of inner radiation belt in terms of their quasi-linear gyro-resonant interaction with oblique whistler-mode waves. The calculated average pitch angle scattering (～ 10~-1 degree)and lifetimes (～ days and hours only ) indicate a significant electron precipitation by these waves into the lower latitude atmosphere. The low calculated lifetimes of energetic electrons and sufficiently high calculated flux of precipitated electrons caused due to gyro-resonant interaction involving oblique whistler-mode waves show that these non-ducted waves are likely to be an effective electron precipitator at the lower edge of inner radiation belt.