The study of fluorescence response to energy deposition in the BGO calorimeter of DAMPE

Cong Zhao,Haoting Dai,Chengming Liu,Yifeng Wei, Yunlong Zhang,Zhiyong Zhang,Libo Wu,Ying Wang,Xiaolian Wang,Zizong Xu,Guangshun Huang

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment（2022）

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摘要

The DArk Matter Particle Explorer (DAMPE) space mission is designed to measure cosmic rays and gamma rays. The key sub-detector of DAMPE is the Bismuth Germanium Oxide (BGO) Electromagnetic CALorimeter (ECAL), which measures the energies of electrons/gamma-rays ranging from 5 GeV–10 TeV. A laser test carried out to study the response of the BGO ECAL to up to ∼TeV energy deposition revealed that the BGO fluorescence response retains linearity at laser energy deposition densities higher than that induced by a ∼10 TeV electromagnetic shower. The energy measurements obtained from on-orbit data were also compared with Monte Carlo simulation results. The present study confirms that there is no fluorescence quenching effect in the DAMPE BGO ECAL.

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关键词

DAMPE,BGO crystal,Laser test,Fluorescence quenching effect

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