A study of the new hemispherical 9-inch PMT
Fengjiao Luo, Yuekun Heng, Zhimin Wang, Zhonghua Qina, Anbo Yang, Nan, Li, Gang Wang, Yan Zhang, Zhiyan Cai, Mengzhao Li, Haiqiong Zhang, Meihang, Xu, Zhi Wu, Yuanbo Chen
TL;DR
This paper evaluates a new 9-inch hemispherical photomultiplier tube, highlighting its superior transit time spread, nonlinearity, gain, and resolution, based on tests in a JUNO prototype detector.
Contribution
It provides the first comprehensive study of the new HZC 9-inch hemispherical PMT's performance characteristics.
Findings
Transit time spread of 2.35 ns (FWHM)
Small nonlinearity at 750 photoelectrons (5%)
High gain of 10^7 with good single PE resolution
Abstract
The new hemispherical photomultiplier tubes (PMTs) with 9 inch diameter from Hainan Zhanchuang Photonics Technology Co.,Ltd (HZC) have been studied. Narrow transit time spread (FWHM=2.35 ns) accompanied by small nonlinearity (750 photoelectrons at 5%) and high gain (1E7 ) with good single photoelectron (PE) resolution have been observed. 11 PMTs of this type are deployed and studied in the prototype detector for JUNO at IHEP, China.
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