Study on relative collection efficiency of PMTs with spotlight
作者机构：University of Chinese Academy of ScienceBeijing 100049China Institute of High Energy PhysicsBeijing 100049China State Key Laboratory of Particle Detection and ElectronicsBeijing 100049China Key Laboratory of Particle AstrophysicsBeijing 100049China
出 版 物：《Radiation Detection Technology and Methods》 (辐射探测技术与方法（英文）)
年 卷 期：2019年第3卷第3期
页 面：30-36页
学科分类：07[理学] 070202[理学-粒子物理与原子核物理] 0702[理学-物理学]
主 题：PMT QE Relative DE Relative CE
摘 要：nd Photon detection efficiency is a key parameter of PMTs in high-precision neutrino and dark matter experiments,while normally the quantum efficiency is used with a normalization factor and angular response as the detection efficiency,where it is always coupled with detector response from the calibration ***,the absolute photon detection efficiency of 20′′PMTs in photon-counting level is further considered rather than the combination of quantum efficiency and normalization *** and method In order to have a good understanding of photon detection efficiency of the large-area PMT,we conduct a detailed comparison of relative collection efficiencies of a series of PMTs with *** study is based on the tests of relative quantum efficiency and relative detection efficiency,checked with several light *** All the results are consistent in relative QE and DE measurement with different light intensities,and the error of each parameter is coupled in our *** on the measurements,Hamamatsu R12860 shows the maximum collection efficiency with spotlight at PMT center,and Hamamatsu R12199,R1355 and HZC XP72B22 have the same level of CE within the *** Following the configuration on incident light and DE definition,we can further define the DE of a large-area PMT with similar algorithms,which will also be used for detector simulation in JUNO.
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