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多气隙电阻板室(Multi-gap Resistive Plate Chamber,MRPC)是一种新型气体探测器,具有探测效率高和时间分辨好等优点,在内层玻璃涂硼后可用于热中子探测。不同的工作气体对涂硼MRPC热中子探测器的性能有很大影响。利用Garfield模拟了不同工作气体的汤生系数η、电子吸附系数α、漂移速度v、扩散系数D等物理参数,并计算给出了MRPC的时间分辨率σt、本征探测效率ε。通过模拟结果对工作气体进行优化,为探测器的实际制作和实验测试提供必要的指导。
Multi-gap Resistive Plate Chamber (MRPC) is a new type of gas detector with the advantages of high detection efficiency and time resolution. It can be used for thermal neutron detection after the inner glass is coated with boron. Different working gases have a great influence on the performance of boron-coated MRPC neutron detectors. The Garfield model was used to simulate the physical parameters such as the raw coefficient η, the electron adsorption coefficient α, the drift velocity v and the diffusion coefficient D of different working gases. The time resolution σt and the intrinsic detection efficiency ε of MRPC were calculated. The working gas is optimized by simulation results, which provides the necessary guidance for the actual fabrication and experimental testing of the detector.