Simulation of MRPC performance under different counting rates

Abstract

Abstract The increasing luminosity of accelerators requires a higher counting rate capability of detectors. Previous studies have mostly simulated the detection efficiency of RPCs at a high counting rate but rarely involved the time resolution. In this paper, Geant4 software is used to simulate the interaction between particles and detectors, avalanche multiplication (considering the effect of space charge), and the generation, amplification, and shaping of the induction signal. A model is used to describe the establishment and recovery of the internal electric field in an MRPC at a high rate. We obtain the detection efficiency and time resolution of MRPCs with different structures at different counting rates. The simulation results are in good agreement with the experimental results, which verifies the feasibility of the model. At the same time, it has been confirmed that MRPCs built with the low resistivity glass developed by Tsinghua University can achieve a time resolution of 60–80 ps and a 90% efficiency at a flux up to 70 kHz/cm2 both in the experimental and simulation results.