PMT overshoot study for JUNO prototype detector

分类： 物理学 >> 核物理学 提交时间： 2016-08-31

Feng-Jiao Luo Yue-Kun Heng Zhi-Min Wang Pei-Liang Wang Zhong-Hua Qin 2 Mei-Hang Xu Dong-Hao Liao Hai-Qiong Zhang Yong-Bo Huang Xiang-Cui Lei Sen Qian Shu-Lin Liu Yuan-Bo Chen Yi-Fang Wang

摘要： The quality of PMT signal is one of the key items for a large and high precision neutrino experiment, like Daya Bay, JUNO, while most of the experiments are affected by the PMT signal overshoot from its positive HV-single cable scheme. For JUNO prototype detector, we have a detailed study on the PMT overshoot and successfully reduced the ratio of overshoot amplitude to signal to ~1% from previous typical ~10%, with no affection to PMT other parameters. Furthermore, we calculated that the overshoot is a result of discharging of capacitors in the HV-signal splitter and the PMT voltage divider. The study result is extremely important for JUNO and other similar experiments.

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