Instrument for measuring the spectrum of high-energy electrons in cosmic rays

The instrument described consists of two independent telescopes of scintillation and Cerenkov counters and is intended for the measurement of the flux density and energy spectrum of cosmic ray electrons at energies exceeding 100 MeV. The detection of electrons in a background of protons and nuclei is based on the fact that the probability of formation of electron photon cascades in the detector is considerably greater than that of other, heavier particles. The instrument was calibrated on electron and proton beams from accelerators and on cosmic ray mu-mesons and electrons at sea level. The instrument was used aboard the Cosmos-428 satellite.