Nuclear Techniques ›› 2014, Vol. 37 ›› Issue (09): 90401-090401.doi: 10.11889/j.0253-3219.2014.hjs.37.090401


Measurement and study of the photocathode quantum efficiency of photoelectric conversion device

XIA Jingkai1,2,3 QIAN Sen1,2 WANG Wenwen1,2,4 NING Zhe1,2 CHENG Yaping1,2,3 WANG Yifang1,2 JIANG Xiaoshan1,2 WANG Zheng1,2 LI Xiaonan1,2 QI Ming4 HENG Yuekun1,2 LIU Shulin1,2   

  1. 1(State Key Laboratory of Particle Detection and Electronics, Beijing 100049, China) 2(Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China) 3(University of Chinese Academy of Sciences, Beijing 100049, China) 4(Nanjing University, Nanjing 210093, China)
  • Received:2014-05-16 Revised:2014-06-23 Online:2014-09-10 Published:2014-09-09
  • Contact: Sen QIAN

Abstract: Background: Photoelectric devices such as photomultiplier tubes (PMTs), photo diodes (PDs) and solar cells are widely used in many applications, so reliable evaluation on the performances of such devices is quite necessary, especially for the accurate measurements and calibrations on the photocathode quantum efficiency (QE). Purpose: We aim to build up a cathode performance evaluation system and study the properties of different types of cathodes. Methods: Two different methods named as the relative measurement and the direct measurements were employed to measure the QE values of cathodes. In addition, a 2D platform was built to achieve convenient and accurate processes for the plane type photocathode position uniformity test. Results: With the evaluation system, the cathode properties of dozens of photoelectric devices were tested. The measured QE results, either from the relative or the direct measurement, are consistent with the data provided by the manufacturers or a third party. Conclusion: Our cathode evaluation system is reliable and could be used to study the detailed photocathode properties such as QE, spectral response and position uniformity.

Key words: Photoelectric conversion device, Photocathode, Quantum efficiency (QE) measurement