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arXiv · 1208.3049

A GEANT4 Simulation Studyof BESIII endcap TOF Upgrade

Hui Zhang·Ming Shao·Cheng Li·Hongfang Chen·Yuekun Heng·Yongjie Sun·Zebo Tang Changsheng Ji·Tianxiang Chen·Shuai Yang·Lailin Xu
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Abstract

A GEANT4-based Monte-Carlo 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. Multi-gap Resistive Plate Chamber (MRPC) with a smaller readout cell structure is more suitable for ETOF detector due to significantly reduced multi-hit rate, 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 a MRPC ETOF is also improved. These simulation results suggest and guide an ETOF upgrade effort at BESIII.

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Hui Zhang, Ming Shao, Cheng Li, Hongfang Chen, Yuekun Heng, Yongjie Sun, Zebo Tang Changsheng Ji, Tianxiang Chen, Shuai Yang, Lailin Xu. 2012-08-15. A GEANT4 Simulation Studyof BESIII endcap TOF Upgrade. https://doi.org/10.1088/1674-1137/37/9/096002

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