Result of proton beam energy calibration of GECAM satellite charged particle detector

A charged particle detector (CPD) is one of two main detectors on the GECAM satellite. It was designed to detect charged particles. Electrons and protons are space’s mainly charged particles. So, a research on the proton detection ability of a CPD and deriving the energy response to charged particles of the CPD in the two designed operating modes is important. The proton calibration tests of the CPD under different working modes were carried out at the Heavy Ion Research Facility in Lanzhou. Through testing and analysis, it was concluded that when CPD works in semi-component mode, it can detect the maximum energy, and when working in full-component mode, it can provide better energy resolution.