Author:
Zhang Yu,Wang Zhimin,Li Min,Zhang Yongpeng,Wang Yaoguang,Peng Zhaoyuan,Yang Changgen,Heng Yuekun
Abstract
Abstract
The main goal of the JUNO experiment is to determine the
neutrino mass ordering with a 20 kt liquid-scintillator
detector. The 20-inch PMT is crucial as one of JUNO key instruments
to realize an excellent energy resolution of at least 3% at
1 MeV. The knowledge on PMT's characterisation and feature is
critical for detector performance understanding. Large pulses from
PMT dark count such as from the flasher or others are one of the
serious concerns for detector noise control. Focusing on the large
pulses from 20-inch PMT dark count, this paper is trying to
investigate the causes by measurements with a muon tagging
system. It is found that the large pules of 20-inch PMT dark count
is contributed mainly from muons hitting the PMT glass, and we have
a preliminary understanding of the results with a simulation based
on Geant4.
Subject
Mathematical Physics,Instrumentation
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