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FU Zai-Wei, QIAN Sen, NING Zhe, LIU Shu-Dong, CHEN Xiao-Hui, HENG Yue-Kun, WANG Yi-Fang, QI Ming, YANG Shuai, SUN Yong-Jie, SHAO Ming, LI Cheng and ZHENG Yang-Heng. Cosmic ray test for a T0 detector[J]. Chinese Physics C, 2011, 35(10): 946-951. doi: 10.1088/1674-1137/35/10/011
FU Zai-Wei, QIAN Sen, NING Zhe, LIU Shu-Dong, CHEN Xiao-Hui, HENG Yue-Kun, WANG Yi-Fang, QI Ming, YANG Shuai, SUN Yong-Jie, SHAO Ming, LI Cheng and ZHENG Yang-Heng. Cosmic ray test for a T0 detector[J]. Chinese Physics C, 2011, 35(10): 946-951.  doi: 10.1088/1674-1137/35/10/011 shu
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Received: 2011-01-17
Revised: 2011-03-09
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Cosmic ray test for a T0 detector

Abstract: The endcap of time-of-flight (ETOF) detector in BES (Beijing Spectrometer) III is planned to be upgraded by using multi-gap resistive plate chambers (MRPCs) and the designed time resolution of the MRPCs is around 50 ps. Thus a time-zero (T0) detector needs to be built to offer a high quality reference time for the MRPCs beam test. So a T0 detector is built using plastic scintillator tiles (BC420) to couple with four fast phototubes (PMTs, Hamamatsu H6533). The timing properties of the detector is studied by using a cosmic ray test and factors related to the time resolution, such as plastic scintillator size, readout mode and angle effects, are discussed. T0 detector timing resolutions of ~41-62 ps are achieved, which means that the T0 detector can be used in the MRPC beam test.

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