Performance testing of a novel short axis photomultiplier tube for the HUNT project
arxiv(2024)
摘要
Photomultiplier tubes (PMTs) with large-area cathodes are increasingly being
used in cosmic-ray experiments to enhance detection efficiency. The optical
modules (OMs) of the High-Energy Underwater Neutrino Telescope (HUNT) have
employed a brand new N6205 20-inch microchannel plate photomultiplier tube
(MCP-PMT) developed by the North Night Vision Science Technology (Nanjing)
Research Institute Co. Ltd. (NNVT). In order to make the 20-inch PMT fit into
the 23-inch diameter pressure-resistant glass sphere, NNVT improved the
internal structure of PMT and shortened the height of PMT by more than 10 cm.
The first batch of these PMTs has been delivered for preliminary research work.
This paper describes a specific PMT testing platform built for the first batch
of 15 MCP-PMTs, and some performance parameters of PMT, such as P/V ratio, TTS
and nonliniearity, are measured.The measurement results show that the new PMT
still has good performance and can meet the requirements of HUNT project.
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