| A GEANT4 simulation study of BESⅢ endcap TOF upgrade |
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| 引用本文： | 张辉,邵明,李澄,陈宏芳,衡月昆,孙勇杰,唐泽波,姬长胜,陈天翔,杨帅.A GEANT4 simulation study of BESⅢ endcap TOF upgrade[J].中国物理 C,2013,37(9). |
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| 作者姓名： | 张辉 邵明 李澄 陈宏芳 衡月昆 孙勇杰 唐泽波 姬长胜 陈天翔 杨帅 |
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| 作者单位： | 1 State Key Laboratory of Particle Detection and Electronics, University of Science and Technology of China, Hefei 230026, China;;2 Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China;;3 Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China |
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| 摘 要： | A GEANT4-based Monte-Carlo (MC) model is developed to study the performance of endcap time-of-flight (ETOF) at BESⅢ. It's found that the multiple scattering effects, mainly from the materials at the MDC endcap, can cause multi-hit on the ETOF's readout cell and significantly influence the timing property of ETOF. A multi-gap resistive plate chamber (MRPC) with a smaller readout cell structure is more suitable for the ETOF detector due to significantly reduced multi-hit rate (per channel), from 71.5% for currently-used scintillator-based ETOF to 21.8% or 16.7% for MRPC-based ETOF, depending on the readout pad size used. The timing performance of an MRPC ETOF is also improved. These simulation results suggest and guide an ETOF upgrade effort at BESⅢ.
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| 关 键 词： | BESⅢ multi-hit ETOF Upgrade MRPC time resolution |
| 收稿时间： | 2012-11-12 |
| 修稿时间： | 2013-4-9 |
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