A study of the new hemispherical 9-inch PMT

Authors :: Ning Li
Yuanbo Chen
Yuekun Heng
H.Q. Zhang
Feng-Jiao Luo
Zhonghua Qin
Zhen Wang
Yuezhao Zhang
An-bo Yang
Mengzhao Li
Xiaofeng Yang
Zhi Wu
Meihang Xu
Zhiyan Cai
Publication Year :: 2018
Publisher :: arXiv, 2018.
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.<br />Comment: 9pages, 13 figures