Sipms For Direct Scintillation Light Detection In Noble Liquids
2019 IEEE NUCLEAR SCIENCE SYMPOSIUM AND MEDICAL IMAGING CONFERENCE (NSS/MIC)(2019)
摘要
The extremely low dark count rate of the state-of-the-art vacuum ultraviolet sensitive SiPMs working in cryogenic temperature is about five orders of magnitude lower than at room temperature. However, the dark rate or the corresponding dark current of the same SiPM working in purified noble liquids of Ar, Kr, and Xe are generally higher. We show that the higher dark rate is caused by the nonzero scintillation light events triggered by environmental radio-activity in an ordinary laboratory at sea-level. Although these background scintillation light in noble liquids are in single-photon low light level, in some applications it might be a nonnegligible background.
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关键词
background scintillation light,single-photon low light level,environmental radio-activity,nonzero scintillation light events,higher dark rate,purified noble liquids,cryogenic temperature,state-of-the-art vacuum ultraviolet sensitive SiPMs,extremely low dark count rate,direct scintillation light detection,temperature 293.0 K to 298.0 K,Kr,Xe,Ar
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