We measured 200 MeV proton damages on Hamamatsu MPPCs (Si-PMs), S13360-6050CS and S14160-6050HS, using the Wakasa Wan Energy Resarch Center in Japan. To achieve the lower energy threshold of CsI(Tl) with the damaged MPPCs, we measured the performances at different operation voltages and temperatures. The lower operational voltage is preferred due to the large increase of the dark current. The...
Gravitational wave high-energy Electromagnetic Counterpart All-sky Monitor (GECAM) is an all-sky monitor composed of two microsatellites launched in Dec. 2020. Each GECAM satellite is equiped with 25 SiPM-based gamma-ray detectors (GRD) and 8 SiPM-based charged particle detectors (CPD). Due to the anomalies in the satellite power supply, only one satellite (GECAM-B) can observe about 10 hours...
The main effect of radiation damage in a Silicon-Photolumtiplier (SiPM) is a dramatic increase in the dark current. The power dissipated, if not properly cooled, heats the SiPM, whose performance parameters depend on temperature. Heating studies were performed with a KETEK SiPM, glued on an alumina substrate, which is either directly connected to a temperature-controlled chuck of a probe...
The Gravitational Wave Electromagnetic Counterpart All-sky Monitor (GECAM) was launched on December 10, 2020 (Beijing Time). It is composed of two microsatellites and each GECAM satellite consists of 25 SiPM-based gamma-ray detectors (GRDs) and 8 SiPM-based charged particle detectors (CPDs). The in-flight background of GRD mainly consists of cosmic X-ray background, SAA proton activated LaBr3...
Silicon photomultiplier (SiPM) has recently been used in several space-borne missions for scintillator readout, thanks to its solid state, compact size, low operating voltage and insensitivity to magnetic fields. However, a known issue of operating SiPM in space environment is the radiation damage and thus the performance degradation. In-orbit quantitative study of these effects is still very...
