Nuclear Techniques ›› 2015, Vol. 38 ›› Issue (8): 80403-080403.doi: 10.11889/j.0253-3219.2015.hjs.38.080403


Development of a test bench for plastic scintillator counters for the DAMPE

ZHANG Yongjie1,2 YU Yuhong1 ZHOU Yong1,3 SUN Zhiyu1 FANG Fang1,4 CHEN Junling1 LIU Jie1   

  1. 1(Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China) 2(Northwest Normal University, Lanzhou 730070, China) 3(University of Chinese Academy of Sciences, Beijing 100049, China) 4(University of Science & Technology of China, Hefei 230022, China)
  • Received:2015-03-03 Revised:2015-05-08 Online:2015-08-10 Published:2015-08-13

Abstract: Background: Plastic scintillator detector array (PSD), developed by Institute of Modern Physics, Chinese Academy of Sciences (IMPCAS), is one of the most important parts in the payload of Dark Matter Particles Explorer (DAMPE) which is mainly used for the study of dark matter. As an anti-coincidence detector, and a charged-particle identification detector, the PSD is composed by 82 plastic scintillator counters. Purpose: Due to the difference among a batch of scintillator counters, it is necessary to develop a test bench with high test efficiency and also to obtain their performance, such as uniformity of light output, light attenuation length, peak of Minimum Ionizing Particle (MIPs) and detection efficiency simultaneously. Methods: A high-efficiency test bench, including electronic modules, data acquisition, analysis system, etc, has been constructed to study the characteristics of 24 scintillator counters with cosmic rays. Individual trigger module with dimensions of 34 cm×2 cm×1 cm has been set up at different points of ±34 cm, ±17 cm and 0 cm. With this test bench, the light attenuation length and other main parameters of 20 counters have been investigated. Results and Conclusion: Through the high-efficiency test bench, data of 20 scintillator counters could be obtained simultaneously. After analysis of 185 counters’ data, we can select 82 counters which fulfill all technology parameters provided by DAMPE and use in PSD.

Key words: Plastic scintillator counter, Attenuation length, Relative light yield, Detection efficiency