Mass testing and characterization of 20-inch PMTs for JUNO
Mass testing and characterization of 20-inch PMTs for JUNO
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DOI：
10.1140/epjc/s10052-022-11002-8
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发表时间：
2022-05
期刊：
影响因子：
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通讯作者：
A. Abusleme;T. Adam;Shakeel Ahmad;Rizwan Ahmed;S. Aiello;M. Akram;A. Aleem;Tsagkarakis Alexandros-Tsagkarakis
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文献类型：
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作者：
A. Abusleme;T. Adam;Shakeel Ahmad;Rizwan Ahmed;S. Aiello;M. Akram;A. Aleem;Tsagkarakis Alexandros-Tsagkarakis
JUNO实验的主要目标是使用20 kt液体闪烁体探测器确定中微子质量排序。它的主要特点是在1 MeV下至少3%的出色能量分辨率，其仪器需要满足一定的质量，因此必须充分表征。JUNO从2017年开始进行详细的测试计划，历时约四年，已经收到并评估了超过20，000台20英寸PMT。基于该质量表征和一组特定要求，可以确定所有可接受的PMT的良好质量。本文介绍了所设计的测试系统以及所有20英寸光电倍增管的统计特性进行测试程序打算在JUNO实验中使用，涵盖超过15个性能参数，包括光阴极的均匀性。这是迄今为止生产和详细研究的20英寸光电倍增管的最大样本，即北方夜视技术公司（NNVT）新开发的15，000个20英寸MCP-光电倍增管和滨松光子学公司（Hamamatsu Photonics K.）的5000个倍增管。K.（HPK）。
Main goal of the JUNO experiment is to determine the neutrino mass ordering using a 20 kt liquid-scintillator detector. Its key feature is an excellent energy resolution of at least 3% at 1 MeV, for which its instruments need to meet a certain quality and thus have to be fully characterized. More than 20,000 20-inch PMTs have been received and assessed by JUNO after a detailed testing program which began in 2017 and elapsed for about four years. Based on this mass characterization and a set of specific requirements, a good quality of all accepted PMTs could be ascertained. This paper presents the performed testing procedure with the designed testing systems as well as the statistical characteristics of all 20-inch PMTs intended to be used in the JUNO experiment, covering more than fifteen performance parameters including the photocathode uniformity. This constitutes the largest sample of 20-inch PMTs ever produced and studied in detail to date, i.e. 15,000 of the newly developed 20-inch MCP-PMTs from Northern Night Vision Technology Co. (NNVT) and 5000 of dynode PMTs from Hamamatsu Photonics K. K.(HPK).