Design and performance study of the HEPP-H calorimeter onboard the CSES satellite

The China Seismo-Electromagnetic Satellite (CSES) will investigate iono-magnetospheric disturbance and will monitor the temporal stability of the inner Van Allen radiation belts. In particular, the mission aims at confirming the existences of a temporal correlation between the occurrence of earthquakes and the observation of electromagnetic disturbances, plasma fluctuations and anomalous fluxes of high-energy particles precipitating from the inner Van Allen belt in space. The high energy detector of the High Energy Particle Package (HEPP-H) is a payload onboard CSES and is designed for detecting electrons (2-50MeV) and protons (20-200MeV) in its 500 km orbit above Earth. CSES was launched in February 2018. In this paper, the instrumentation and development of the HEPP-H calorimeter are described. The calibration with beam particles (electrons and protons) is discussed in detail.