The Beijing Spectrometer III (BESIII) endcap Time-Of-Filght (ETOF) was proposed to upgrade with Multigap Resistive Plate Chamber (MRPC) technology to substitute the current ETOF of scintillator+PMT for extending time resolutin better than 80 ps and enhance the particle identification capability to satisfy the higher precision requirement of physics. The ETOF system including MRPC modules, front end electronics (FEE), CLOCK module, fast control boards and time to digital modules (TDIG), has been designed, constructed and done some experimental tests seperately. Aiming at examining the quality of entire ETOF system and training the operation of all participated parts, a cosmic ray test system was built at the laboratory and underwent about three months to guarantee performance. In this paper the results will be presented indicating that the entire ETOF system works well and satisfies the requirements of the upgrade.
@article{arxiv.1604.02701,
title = {The upgrade system of BESIII ETOF with MRPC technology},
author = {Xiaozhuang Wang and Yongjie Sun and Cheng Li and Yuekun Heng and Zhi Wu and Ping Cao and Hongliang Dai and Xiaolu Ji and Wenxuan Gong and Zhen Liu and Xiaolan Luo and Weijia Sun and Siyu Wang and Yun Wang and Rongxing Yang and Mei Ye and Jinzhou Zhao},
journal= {arXiv preprint arXiv:1604.02701},
year = {2016}
}