R & D of prototype iTOF-MRPC at CEE

The cooling storage ring (CSR) external-target experiment (CEE) is a spectrometer running at the Heavy Ion Research Facility (HIRFL) Lanzhou. CEE first large-scale nuclear physics experimental device by China to operate in fixed-target mode with an energy of ∼ 1 GeV. purpose study properties dense matter. uses multi-gap resistive plate chamber (MRPC) as its internal time-of-flight (iTOF) detector for identification final-state particles. An iTOF-MRPC prototype 24 gaps was designed meet requirements CEE, and readout electronics use FPGA-based time digitization technology. Using cosmic ray tests, resolution iTOF found be approximately 30 ps. In order further understand how improve MRPC, ANSYS HFSS used simulate signal transmission process MRPC. main factors affecting timing performance MRPC and, accordingly, optimization scheme are presented.