Ground Calibration of Gamma-Ray Detectors of GECAM-C
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT(2024)
Abstract
As a new member of the GECAM mission, GECAM-C (also named High Energy Burst Searcher, HEBS), launched onboard the SATech-01 satellite on July 27th, 2022, is capable of monitoring gamma-ray transients from ∼ 6 keV to ∼ 6 MeV. GECAM-C is equipped with 12 gamma-ray detectors (GRDs) as its main detectors. To test the performance of GECAM-C GRDs and verify the energy response simulated by Monte Carlo, comprehensive on-ground calibration experiments have been performed using X-ray beam and radioactive sources, including Channel–Energy relation, energy resolution, detection efficiency, Silicon Photomultipliers (SiPM) voltage-gain relation, and non-uniformity of positional response. This paper presents the calibration campaigns and the results of data analysis for GECAM-C GRDs.
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Key words
Calibration,LaBr3(Ce/Ce+Sr) detector,NaI(Tl) detector,Gamma-ray burst,GECAM-C
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