The study of the aging behavior on large area MCP-PMT

分类： 物理学 >> 核物理学 提交时间： 2016-09-13

WANG Wen-Wen QIAN Sen QI Minga XIA Jing-Kai CHENG Ya-Ping NING Zhe LUO Feng-Jiao HENG Yue-Kun LIU Shu-Lin SI Shu-Guang Sun Jian-Ning LI Dong WANG Xing-Chao HUANG Guo-Rui TIAN Jing-Shou WEI Yong-Lin LIU Hu-Lin LI Wei-Hua WANG Xing XIN Li-Wei

摘要： Aging experiments of a novel type of large area MCP-PMT made by JUNO collaboration were conducted.In these aging experiments, the multi-photoelectron spectrum and single photoelectron spectrum were measured daily,as well as the MCP resistance of the second PMT before and after the experiment. Two PMTs were aged successivelyfor cross check. The first PMT was aged for 52 days, while the other one was aged for 84 days. In order to study the mechanism of the aging process, the high voltage on the second PMT was increased to accelerate its aging process when the cumulative output of charge from its anode was about 4 C. From our study, it can be known that large area MCP-PMT aging had a strong relationship with the related MCPs. In accordance with the PMT aging curve,a PMT aging model was setup and a general aging formula was given.

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