Gain stabilization and consistency correction approach for multiple SiPM-based gamma-ray detectors on GECAM
arXiv:2110.01796 · doi:10.1016/j.nima.2021.166222
Abstract
Each satellite of the Gravitational wave high-energy Electromagnetic Counterpart All-sky Monitor (GECAM, mission) consists of 25 SiPM based gamma-ray detectors (GRDs). Although SiPM based GRD has merits of compact size and low bias-voltage, the drift of the SiPM gain with temperature is a severe problem for GRD performance. An adaptive voltage supply source was designed to automatically adjust the SiPM bias voltage to compensate the temperature effects and keep the gain stable. This approach has been proved to be effective during both the on-ground and in-flight tests. The in-flight measured variation of the SiPM gain is within 2%. To reduce the gain non-uniformity of GRDs, an iterative bias voltage adjustment approach is proposed and implemented. The gain non-uniformity is reduced from 17% to 0.6%. In this paper, the gain stabilization and consistency correction approach are presented and discussed in detail.
arXiv comment14 pages, 21 figures
References in corpus (9)
- Multi-messenger Observations of a Binary Neutron Star Merger
- Gravitational Waves and Gamma-rays from a Binary Neutron Star Merger: GW170817 and GRB 170817A
- The Fermi Gamma-Ray Burst Monitor
- The evolution of the X-ray afterglow emission of GW 170817 / GRB 170817A in XMM-Newton observations
- Brightening X-ray Emission from GW170817/GRB170817A: Further Evidence for an Outflow
- Energy Response of GECAM Gamma-Ray Detector Based on LaBr3:Ce and SiPM Array
- GRID: a Student Project to Monitor the Transient Gamma-Ray Sky in the Multi-Messenger Astronomy Era
- A low-energy sensitive compact gamma-ray detector based on LaBr3 and SiPM for GECAM
- A novel analog power supply for gain control of the Multi-Pixel Photon Counter (MPPC)