Nuclear Techniques ›› 2018, Vol. 41 ›› Issue (8): 80402-080402.doi: 10.11889/j.0253-3219.2018.hjs.41.080402


Effect of divider current on 7.62cm photomultiplier tube performance

WANG Gang1,3, HENG Yuekun2,3,4, LI Xiaohua1, LI Nan2,3,4, WANG Zhimin2, HE Miao2,3, LUO Fengjiao2,3,4, HUANG Liangsheng1,3, LI Mengzhao2,3,4, YANG Yuzhen3, ZHANG Yan2,3,4, WEN Kaile2,3,4   

  1. 1. University of South China, Hengyang 421001, China;
    2. Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China;
    3. State Key Laboratory of Particle Detection and Electronics, Beijing 100049, China;
    4. University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2017-08-29 Revised:2018-01-16 Online:2018-08-10 Published:2018-08-15
  • Supported by:
    Supported by Strategic Priority Research Program of Chinese Academy of Sciences (No.XDA10011200)

Abstract: [Background] The 7.62cm (3-inch) photomultiplier tube (PMT) is an important component of the Jiangmen Underground Neutrino Observatory (JUNO) giant detector, which will work as an independent detection system for the physics measurements, and will calibrate as well as crosscheck the 50.8cm (20-inch) PMT detection system. It is required that the single-channel current supply of each 7.62cm PMT high voltage does not exceed 10 μA.[Purpose] This study aims to reduce the performance requirements of the high-voltage power supply system and improve the reliability of the system.[Methods] The effects of different high-voltage currents on the detection performance of the 7.62cm PMT are studied by experiments. Three kinds of high voltage current dividers were used to test the performance of an HZC XP72B20 7.62cm PMT sample (serial number 70069), including gain, energy resolution, peak to valley ratio and non-linearity of the anode output signal.[Results] The change of the divider current has negligible impact on these probing performances.[Conclusions] This result provides an important experimental reference for the use of small divider current in the JUNO detector for the 7.62cm PMT.

Key words: Photomultiplier tube, Divider current, Single photoelectron spectrum, Nonlinearity

CLC Number: 

  • TL813