Particle Detectors
MEPAD
The Medium Energy Proton and Electron Detector (MEPAD) has two sets of proton and electron telescopes and four omni-directional detectors. These provide both directional and omni-directional measurements. The directional sensors, called telescopes, make independent measurements of the particle types in six energy ranges from 30 to greater than 6900 keV for protons, and three energy thresholds from 30 to 300 keV for electrons. Directional measurements are made near the zenith direction and 90? off nadir. The omni-directional sensors measure proton energy in four thresholds from 16 to 140 MeV. [Summary provided by ESA.]