The study of time calibration for upgraded end cap TOF of BESIII  

作　　者：Ying-Xiao Guo Sheng-Sen Sun Fen-Fen An Rong-Xing Yang Ming Zhou Zhi Wu Hong-Liang Dai Yue-Kun Heng Cheng Li Zi-Yan Deng Huai-Min Liu Wei-Guo Li 

机构地区：[1]Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China [2]University of Chinese Academy of Sciences,Beijing 100049,China [3]University of Science and Technology of China,Hefei 230026,China [4]State Key Laboratory of Particle Detection and Electronics,Beijing 100049,China

出　　处：《Radiation Detection Technology and Methods》2017年第2期51-56,共6页辐射探测技术与方法（英文）

基　　金：Supported in part by National Natural Science Foundation of China(U1232201,11575225,11605220);National Key Basic Research Program of China(2015CB856700);Chinese Academy of Sciences(1G201331231172010).

摘　　要：Purpose The end cap time of flight at Beijing Spectrometer is upgraded with multi-gap resistive plate chamber technology in order to improve the charged particle identification capability.The time-over-threshold is used for the time slewing correction instead of the signal amplitude.Methods The correlation of the multi-peak time-over-threshold and the hit position along the strip of the charged particle is investigated.Implementation of the off-line data calibration method is discussed in detail.Results and conclusion The overall time resolution for pions with momentum around 0.8 GeV/c is about 65 ps.

关 键 词：Time calibration Time of flight MRPC BESIII 

分 类 号：O57[理学—粒子物理与原子核物理]