Whistler‐Mode Waves Modify the High‐Energy Electron Slot Region and the Outer Radiation Belt

Abstract

AbstractA quasi‐linear diffusion model of energetic electrons (≥50 keV) is established by using the amplitude distribution model of the whistler‐mode waves, the ambient electron (~eV) density distribution model and the IGRF10 magnetic field model in 1 < L < 7 region. The numerical results reveal that the variation of plasmapause location changes the ambient electron density and wave intensity at the different L shells under the different geomagnetic conditions, and the variations of ambient electron density and wave intensity finally change the energetic electron loss region controlled by whistler‐mode hiss and acceleration region controlled by whistlermode chorus. The variation of the energetic electron loss region is consistent with the variation of the slot region, and meanwhile the variation of the electron acceleration region is consistent with the variation of the outer radiation belt, suggesting that the energetic electron loss driven by hiss and acceleration driven by chorus play quite important roles in modifying the slot region and outer electron belt during the recovery phases of the different storms. During the recovery phase of a great storm, for electrons with certain energy, since their loss region controlled by hiss disappears, the inner radiation belt can connect with the outer radiation belt together completely.