Temperature Dependence Calibration and Correction of the DAMPE BGO Electromagnetic Calorimeter
Yifeng Wei, Zhiyong Zhang, Yunlong Zhang, Sicheng Wen, Chi Wang,, Zhiying Li, Changqing Feng, Xiaolian Wang, Zizong Xu, Guangshun Huang and, Shubin Liu
TL;DR
This paper investigates how temperature affects the BGO electromagnetic calorimeter used in DAMPE, calibrates temperature coefficients for each crystal, and proposes a correction method to improve measurement accuracy.
Contribution
It introduces a calibration of temperature coefficients for BGO crystals and presents a correction method to mitigate temperature effects in DAMPE's calorimeter.
Findings
Temperature significantly affects BGO crystal light output.
Calibrated temperature coefficients for each crystal bar.
Proposed correction method improves measurement stability.
Abstract
A BGO electromagnetic calorimeter (ECAL) is built for the DArk Matter Particle Explorer (DAMPE) mission. The effect of temperature on the BGO ECAL was investigated with a thermal vacuum experiment. The light output of a BGO crystal depends on temperature significantly. The temperature coefficient of each BGO crystal bar has been calibrated, and a correction method is also presented in this paper.
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