Nuclear Techniques ›› 2018, Vol. 41 ›› Issue (1): 10401-010401.doi: 10.11889/j.0253-3219.2018.hjs.41.010401


The response characteristics of bi-alkali photocathode PMT to infrared light

YIN Shiyu1, MA Lishuang1, QIAN Sen3,4, GAO Feng2,3,4, ZHU Yao5, WANG Zhigang3,4, NING Zhe3,4, WANG Zhile5, CHEN Pengyu1, YUAN Binhuan5   

  1. 1 North China University of Technology, Beijing 100049, China;
    2 University of Chinese Academy of Sciences, Beijing 100049, China;
    3 Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China;
    4 State Key Laboratory of Particle Detection and Electronics, Beijing 100049, China;
    5 Harbin Institute of Technology, Harbin 150000, China
  • Received:2017-09-05 Revised:2017-10-20 Online:2018-01-10 Published:2018-01-06
  • Supported by:
    Supported by National Natural Science Foundation of China (No.11175198, No.11475209, No.11675205, No.11675196)

Abstract: Background: The spectral response range of the bi-alkali photocathode photomultiplier tube (PMT) is 300 nm to 700 nm. So infrared light is often used as a background light of PMTs during producing or testing. However, the PMT had a red storm, when use the infrared light emitting diode (LED) for its calibration. Purpose: This paper aims to prove that the PMT itself is really responsive to infrared light, rather than the presence of stray light in the LED. Methods: The infrared light was used to interfere the single-photon state of bi-alkali photocathode PMTs. Results: When the power of the infrared laser tube is up to mW, the single photon state of PMTs changed. Conclusion: It is proved that the bi-alkali photocathode PMTs does respond to the infrared light.

Key words: Bi-alkali photocathode, PMT, Single photon test, Infrared response

CLC Number: 

  • TP319