Fig. 1From: Medium-energy particle experiments—electron analyzer (MEP-e) for the exploration of energization and radiation in geospace (ERG) missionSchematic showing the enhancement and decay of the radiation belt. The top and bottom images show the enhanced and decayed radiation belts, respectively. For the acceleration and loss of MeV-range electrons, the medium-energy electrons play important roles as seed populations and through wave generationsBack to article page