光电探测器件的单光电子谱数据获取

[Background] There are two methods to test the single photoelectron spectra (SPE) performance of the photomultiplier tubes (PMT) and Silicon Photomultiplie (SiPMT) with either the charge-to-digital-converter (QDC) module or flash amplitude-to-digital-converter (FADC) module. [Purpose] This study aims to investigate the difference of data acquisition between FADC and QDC for single photoelectron spectra (SPE) of photoelectric detector. [Methods] Single photoelectron spectra (SPE) of 20-inch PMTs of the same model, as well as SiPMT of same mode, were measured under the same testing conditions using FADC module and QDC module. Gain, signal events, detection efficiency, the ratio of peak to valley and energy resolution were compared in details. [Results] Both QDC and FADC can be used as data acquisition tools for PMT SPE test, but each has its own advantages and disadvantages. [Conclusions] According to the system’s specific demand for photoelectric detector, either of the two modules could be chosen.