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

• 来源期刊: 天文和天体物理学研究
• 年，卷（期）: 2019,（3）
• 页码范围: 145-154
• 页数: 10页
• 语种: 英文
• DOI: 10.1088/1674-4527/19/3/47

摘要

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％.