Cosmic ray test for a T0 detector  

作　　者：付在伟 钱森 宁哲 刘曙东 陈晓辉 衡月昆 王贻芳 祁鸣 杨帅 孙勇杰 邵明 李澄 郑阳恒 

机构地区：[1]Department of Physics,Nanjing University [2]Institute of High Energy Physics,Chinese Academy of Sciences [3]Graduate University of Chinese Academy of Sciences [4]Department of Modern Physics,University of Science and Technology of China

出　　处：《Chinese Physics C》2011年第10期946-951,共6页中国物理C（英文版）

基　　金：Supported by State Key program of National Natural Science of China (10979003,10775181,10875140);China PostdoctoralScience Foundation (20090460521)

摘　　要：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 （TO） detector needs to be built to offer a high quality reference time for the MRPCs beam test. So a TO 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. TO detector timing resolutions of -41-62 ps are achieved, which means that the TO detector can be used in the MRPC beam test.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 （TO） detector needs to be built to offer a high quality reference time for the MRPCs beam test. So a TO 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. TO detector timing resolutions of -41-62 ps are achieved, which means that the TO detector can be used in the MRPC beam test.

关 键 词：TO plastic scintillator PMT MRPC ETOF 

分 类 号：O572.1[理学—粒子物理与原子核物理] TH833[理学—物理]