Abstract
Performance characterization for massive photomultiplier tubes (PMTs) is a frequently encountered procedure in large nuclear and particle experiments. To facilitate this work, a dedicated test bench system has been developed at the Institute of Modern Physics, Chinese Academy of Sciences. The two-dimensional photocathode position scanning capability is an intrinsic function of the test bench, and up to 25 PMTs, with the diameter smaller than 2″, can be tested simultaneously. The parameters of the light source pulses can be adjusted in a wide range, thus making it suitable for various characteristics measurements. The test bench system is highly automated with all the controlling operations integrated into a single software. Additionally, the hardware platform is extensible which allows complex testing schemes, and the modularity in the software design makes the migration from one testing configuration to another light-weight and efficient. All these features make the test bench versatile and reusable in different experiments. It has been first used in the construction of the Plastic Scintillator Detector (PSD) of DArk Matter Particle Explorer (DAMPE), and a total of 570 Hamamatsu R4443 tubes were tested successfully. The performance was verified and the testing results are also reported in this article.
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