Photomultiplier tube performance of the WCDA++ in the LHAASO experiment
Photomultiplier tube performance of the WCDA++ in the LHAASO experiment
复制标题
LHAASO 实验中 WCDA 光电倍增管的性能
DOI:
10.1016/j.nima.2019.04.033
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发表时间:
2020-04
期刊:
影响因子:
--
通讯作者:
Cunfeng Feng
中科院分区:
文献类型:
--
作者:
Hengying Zhang;Yanhong Yu;Khuram Tariq;Zongkang Zeng;Xiurong Li;Cheng Liu;Dong Liu;Cunfeng Feng
Abstract In the Large High Altitude Air Shower Observatory (LHAASO), the main physics objective of the water Cherenkov detector array (WCDA) is to survey the sky for gamma-ray sources in the energy range of 100 GeV to 30 TeV. In order to extend the dynamic range of the WCDA, a 1.5-inch photomultiplier tube (PMT) is placed aside the 8-inch PMT in each cell of the WCDA. All of these 1.5-inch PMTs (900 in total) consist of the WCDA dynamic extended system (WCDA++). These PMTs are required to maintain linearity within four orders of magnitude. The performance of the 1.5-inch PMTs with a specially designed bi-readout voltage divider is tested with a PMT test system. Accordingly, the effects of the working high voltage and signal width on the dynamic range of the PMTs are studied. The test results show that the dynamic range with a 5% non-linearity for a driven signal width of 5.5 ns is more than 200 kPEs (photoelectrons). The dark noise count rate is less than 200 Hz for a 1 mV threshold at a PMT gain of 2× 1 0 5. These results confirm that the PMT performance meets the WCDA++ requirements.
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影响因子:
3.6
作者:
Xu 旭 Wang 王;Zhong-Quan 忠泉 Zhang 张;Y. Tian 田;Yan-Yan 艳艳 Du 都-Yan;Xiao 晓 Zhao 赵;Fu-Wang 付旺 Shen 沈;Chang-Yu 长裕 Li 李;Yan-Sheng 延生 Sun 孙;C. Feng 冯
通讯作者:
Xu 旭 Wang 王;Zhong-Quan 忠泉 Zhang 张;Y. Tian 田;Yan-Yan 艳艳 Du 都-Yan;Xiao 晓 Zhao 赵;Fu-Wang 付旺 Shen 沈;Chang-Yu 长裕 Li 李;Yan-Sheng 延生 Sun 孙;C. Feng 冯
影响因子:
1.3
作者:
Zhang, Y.;Shao, M.;Sun, Y.;Zhou, Y.
通讯作者:
Zhou, Y.
影响因子:
0.6
作者:
Huihai He;F. C. Collaboration
通讯作者:
Huihai He;F. C. Collaboration
影响因子:
3.6
作者:
Cao Zhen
通讯作者:
Cao Zhen