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The non-uniformity study under geo-magnetic field of 20-inch MCP-PMT for LHAASO

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摘要 Purpose The large diameter photon sensors are widely applied in astroparticle physics and neutrino physics experiment.Due to its large size,the geo-magnetic effect cannot be ignored.In this work,one 20-inch MCP-PMT are scanned under geo-magnetic field and magnetic shielding environment,and finally,the multi-parameter scanning results are given.Method In order to evaluate the response of MCP-PMTs,an automatic spherical scanning system based on stepper motor and quartz fiber was established.A comprehensive multi-point scanning was performed on the entire 20-inch MCP-PMT,and a multi parameter data scanning model was established.Our self-developed magnetic shielding was used to demonstrate the improvement of magnetic shielding on the ratio of signals,charge uniformity,and time characteristics of the 20-inch MCP-PMT.Results By comparing the results with and without magnetic shielding,it can be concluded that with magnetic shielding,the variation in charge spectrum and the ratio of signals are relatively smaller.At the same time,the composition of photon time spectrum has become simpler.The relative transit time and time spread of photons are reduced to a certain extent,and the uniformity of both is also improved.Conclusion The use of magnetic shielding has improved the various performance of MCP-PMT,preparing for future LHAASO and other experiments.
作者 C.C.Liu B.Gao S.X.Lu M.J.Chen X.H.You K.Li Lin Liu W.K.Gao
机构地区 Zhengzhou University Institute of High Energy Physics TIANFU Cosmic Ray Research Centre University of Chinese Academy of Sciences
出处 《Radiation Detection Technology and Methods》 CSCD 2024年第3期1377-1389,共13页 辐射探测技术与方法（英文）
基金 supported by the Department of Science and Technology of Sichuan Province under Grant 2021YFSY0030.
关键词 Photon-sensor Geo-magnetic effect NON-UNIFORMITY
分类号 P318.2 [天文地球—固体地球物理学]
  • 相关文献

参考文献3

二级参考文献8

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