Evaluation of new large area PMT with high quantum efficiency

分类： 物理学 >> 核物理学 提交时间： 2016-09-13

LEI Xiang-Cui HENG Yue-Kun QIAN Sen XIA Jing-Kai LIU Shu-Lin WU Zhi YAN Bao-Jun XU Mei-Hang WANG Zheng LI Xiao-Nan RUAN Xiang-Dong Wang Xiao-Zhuang YANG Yu-Zhen WANG Wen-Wen FANG Can LUO Feng-Jiao LIANG Jing-Jing 1,4 YANG Lu-Ping 1,7 YANG Biao 1,2

摘要： The neutrino detector of the Jiangmen Underground Neutrino Observatory (JUNO) is designed to use 20 kilotons of liquid scintillator and approximately 16,000 20-inch photomultipliers (PMTs).One of the options is to use the 20-inch R12860 PMT with high quantum efficiency which has recently been developed by Hamamatsu Photonics. The performance of the newly developed PMT preproduction samples is evaluated. The results show that its quantum efficiency is�0%燼t�00nm. Its Peak/Valley (P/V) ratio for the single photoelectron is 4.75 and the dark count rate is�7kHz燼t the threshold of 3 mV while the gain is at��07. The transit time spread of a single photoelectron is2.86ns. Generally the performances of this new 20-inch PMT are improved over the old one of R3600.

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