A Method of Alignment of the Plastic Scintillator Detector of DAMPE

The Plastic Scintillator Detector (PSD) of the DArk Matter Particle Explorer (DAMPE) is designed to measure cosmic ray charge (Z) and to act as a veto detector for gamma-ray identification. In order to fully exploit the charge identification potential of the PSD and to enhance its capability to iden...

Full description

Saved in:
Bibliographic Details
Published in:arXiv.org 2018-08
Main Authors: Peng-Xiong, Ma, Yong-Jie, Zhang, Ya-Peng, Zhang, Yao, Li, Jing-Jing Zang, Li, Xiang, Tie-Kuang Dong, Yi-Zhong, Fan, Shi-Jun, Lei, Wu, Jian, Yu-Hong, Yu, Yuan, Qiang, Yue, Chuan, Zhi-Yu, Sun
Format: Article
Language:English
Subjects:
Alignment
Cosmic rays
Dark matter
Energy spectra
Gamma rays
Rotation
Scintillation counters
Sensors
Space telescopes
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The Plastic Scintillator Detector (PSD) of the DArk Matter Particle Explorer (DAMPE) is designed to measure cosmic ray charge (Z) and to act as a veto detector for gamma-ray identification. In order to fully exploit the charge identification potential of the PSD and to enhance its capability to identify the gamma ray events, we develop a PSD detector alignment method. The path length of a given track in the volume of a PSD bar is derived taking into account the shift and rotation alignment corrections. By examining energy spectra of corner-passing events and fully contained events, position shifts and rotations of all PSD bars are obtained, and found to be on average about 1mm and 0.0015 radian respectively. To validate the alignment method, we introduce the artificial shifts and rotations of PSD bars in the detector simulation. These shift and rotation parameters can be recovered successfully by the alignment procedure. As a result of the PSD alignment procedure, the charge resolution of the PSD is improved from \(4\%\) to \(8\%\) depending on the nuclei.
ISSN:2331-8422
DOI:10.48550/arxiv.1808.05720