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.
@article{arxiv.1503.02497,
title = {The study of the aging behavior on large area MCP-PMT},
author = {Wen-Wen Wang and Sen Qian and Ming Qi and Jing-Kai Xia and Ya-Ping Cheng and Zhe Ning and Feng-Jiao Luo and Yue-Kun Heng and Shu-Lin Liu and Shu-Guang Si and Jian-Ning Sun and Dong Li and Xing-Chao Wang and Guo-Rui Huang and Jing-Shou Tian and Yong-Lin Wei and Hu-Lin Liu and Wei-Hua Li and Xing Wang and Li-Wei Xin},
journal= {arXiv preprint arXiv:1503.02497},
year = {2015}
}