Study of the performance of photomultiplier tubes at high variable counting rates

Study of the performance of photomultiplier tubes at high variable counting rates
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高可变计数率下光电倍增管性能的研究

DOI:
10.1016/j.nima.2021.165433
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发表时间:
2021-08
期刊:
Nuclear Inst. and Methods in Physics Research, A
影响因子:
--
通讯作者:
Cunfeng Feng
Cunfeng Feng
中科院分区:
其他
文献类型:
--
作者:
Yanhong Yu;Hongkui Lv;Thuram Tariq;Dong Liu;Xiangdong Sheng;Cunfeng Feng

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5000多个光电倍增管(PMT)正在部署的电磁粒子探测器(ED)的大型高海拔空气簇射观测站(LHAASO)项目。PMT信号的线性度使用高动态范围基础进行优化。然而,光电倍增管的增益和线性度往往会在各种照明条件下发生变化。本文通过改变信号计数率,研究了XP3960光电倍增管的增益和线性度的变化。PMT增益在高计数率下由于倍增极级之间的电压重新分配而明显增加,从而导致倍增极的线性度明显增加。在高计数率和相应的模拟的PMT的特性的细节进行了描述。这些结果表明,在艾德实验条件下,不同计数率对PMT性能的影响可以忽略。
Over 5000 photomultiplier tubes (PMTs) are being deployed for electromagnetic particle detectors (EDs) for the Large High Altitude Air Shower Observatory (LHAASO) project. The linearity of the PMT signal is optimized using a high dynamic range base. However, the PMT gain and linearity tend to change under various lighting conditions. In this paper, the variations in the gain and linearity of the XP3960 PMT are studied by changing the signal counting rate. The PMT gain increases appreciably at high counting rates due to the voltage redistribution between the dynode stages, resulting in an apparent increase in the linearity of the dynode. The details of the characteristics of PMTs at high counting rates and the corresponding simulations are described. These results show the impact of various counting rates on PMT performances can be ignored in the ED experimental conditions.
DOI: 10.1016/j.nima.2016.04.079
发表时间: 2017-02
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影响因子: --
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扩展 LHAASO-KM2A 电磁粒子探测器的光电倍增管动态范围
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