Fig. 6From: Medium-energy particle experiments—electron analyzer (MEP-e) for the exploration of energization and radiation in geospace (ERG) missionAPD efficiency curve based on the particle-in-matter simulation. The backscattering ratio β(E) was obtained for varying incident energy E, and the efficiency ε = 1 − β is plotted as a function of E (red dots), with a fitted curve (blue)Back to article page