Temperature dependence of SiPM array coupled Cs2LiYCl6:Ce3+ detector performance

A silicon photomultiplier array-coupled Cs2LiYCl6:Ce3+ detector was developed for neutron monitoring onboard the lab module at the China Space Station. As the environmental temperature of the lab module varies, the temperature dependence of the assembled CLYC detector performance should be studied before the detector is installed. In this study, the equilibrium time for the CLYC detector to reach the set temperature in the chamber was estimated. The variabilities of the calibration coefficients and energy resolutions were measured using two gamma-ray sources and a neutron source, and the influence on pulse shape discrimination was investigated by using the charge comparison method. The results illustrated that the calibration coefficients and energy resolutions increase from -40 to +10 ?, and then decrease from +10 to +50 ?, and that the figure of merit value monotonically decreases over the investigated temperature range. These variation curves were applied to the measurement corrections.