The calibration and electron energy reconstruction of the BGO ECAL of the DAMPE detector

Abstract The DArk MatterParticle Explorer (DAMPE) is a space experiment designedto search for dark matterindirectly by measuring the spectra of photons, electrons, and positrons up to 10 TeV. The BGO electromagnetic calorimeter ( ECAL) is its main sub-detector for energy measurement. In this paper, the instrumentation and development of the BGO ECALis briefly described. The calibration on the ground, including the pedestal, minimum ionizing particle (MIP) peak, dynoderatio, and attenuation lengthwith the cosmic rays and beam particles is discussed in detail. Also, the energy reconstruction results of the electrons from the beam test are presented.