Performance Calibration Study of the Payload Onboard the SVOM Satellite

The ground-based calibration of the spectrometer onboard the astronomical satellite is extremely basic and important for the payload to complete the detection missions and achieve the scientific goals. With an excellent determination of the responsive relationship such as energy-channel relation, energy resolution, detection efficiency, and the non-uniformity of the detector, the observational data in orbit of the payload can be analyzed effectively and reasonably. The research has implemented the calibration campaign of a NaI(Tl) detector named GRD05, which is the main detector of the gamma-ray monitor (GRM) onboard the Space-based multiband astronomical Variable Objects Monitor(SVOM) satellite, utilizing a single-crystal monochromatic hard X-ray beam with the range of 15–40 keV. According to the data analysis results, the energy response and detection efficiency of the GRD05 are in good agreement with the expected output by Monte Carlo simulations.