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arXiv · 1511.08959

The cosmic ray test of MRPCs for the BESIII ETOF upgrade

Xiaozhuang Wang·Yuekun Heng·Zhi Wu·Cheng Li·Yongjie Sun·Hongliang Dai·Shengsen Sun·Rongxing Yang·Ping Cao·Jie Zhang·Weijia Sun·Siyu Wang·Xiaolu Ji·Jinzhou Zhao·Wenyuan Gong·Mei Ye·Xiaoyan Ma·Mingming Chen·Meihang Xu·Xiaolan Luo·Kejun Zhu·Zhenan Liu·Xiaoshan Jiang
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Abstract

In order to improve the particle identification capability of the Beijing Spectrometer III (BESIII),t is proposed to upgrade the current endcap time-of-flight (ETOF) detector with multi-gap resistive plate chamber (MRPC) technology. Aiming at extending ETOF overall time resolution better than 100ps, the whole system including MRPC detectors, new-designed Front End Electronics (FEE), CLOCK module, fast control boards and time to digital modules (TDIG), was built up and operated online 3 months under the cosmic ray. The main purposes of cosmic ray test are checking the detectors' construction quality, testing the joint operation of all instruments and guaranteeing the performance of the system. The results imply MRPC time resolution better than 100$ps$, efficiency is about 98$\%$ and the noise rate of strip is lower than 1$Hz/$($scm^{2}$) at normal threshold range, the details are discussed and analyzed specifically in this paper. The test indicates that the whole ETOF system would work well and satisfy the requirements of upgrade.

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Xiaozhuang Wang, Yuekun Heng, Zhi Wu, Cheng Li, Yongjie Sun, Hongliang Dai, Shengsen Sun, Rongxing Yang, Ping Cao, Jie Zhang, Weijia Sun, Siyu Wang, Xiaolu Ji, Jinzhou Zhao, Wenyuan Gong, Mei Ye, Xiaoyan Ma, Mingming Chen, Meihang Xu, Xiaolan Luo, Kejun Zhu, Zhenan Liu, Xiaoshan Jiang. 2016-01-20. The cosmic ray test of MRPCs for the BESIII ETOF upgrade. https://doi.org/10.1140/epjc%2Fs10052-016-4069-x

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