Vol 19, No 3

Calibration of the DAMPE Plastic Scintillator Detector and its on-orbit performance

Meng Ding, Ya-Peng Zhang, Yong-Jie Zhang, Yuan-Peng Wang, Tie-Kuang Dong, Antonio Benedittis, Paolo Bernardini, Fang Fang, Yao Li, Jie Liu, Peng-Xiong Ma, Zhi-Yu Sun, Valentina Gallo, Stefania Vitillo, Zhao-Min Wang, Yu-Hong Yu, Chuan Yue, Qiang Yuan, Yong Zhou, Yun-Long Zhang


Abstract The DArk Matter Particle Explorer (DAMPE) is a space-borne apparatus for detecting the high-energy cosmic-ray-like electrons, γ-rays, protons and heavy ions. The Plastic Scintillator Detector (PSD) is the top-most sub-detector of the DAMPE. The PSD is designed to measure the charge of incident high-energy particles and it also serves as a veto detector for discriminating γ-rays from charged particles. In this paper, a PSD on-orbit calibration procedure is described, which includes the five steps of pedestal, dynode correlation, response to minimum-ionizing particles, light attenuation function and energy reconstruction. A method for reconstructing the charge of incident high energy cosmic-ray particles is introduced. The detection efficiency of each PSD strip is verified to be above 99.5%; the total efficiency of the PSD for charged particles is above 99.99%.


Keywords cosmic ray — instrumentation: DAMPE — charge measurement — plastic scintillator detector calibration

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