Speaker
Description
TOF (Time Of Flight) detector is an important detector for PID (Particle Identification) in high-energy physics experiments. This kind of detector is requested to have excellent time resolution for measuring the timing information of the arriving particles. It is often built with float glass MRPCs, whose efficiency is typically higher than 95%, the time resolution could be better than 100ps and the rate capability is a few hundred Hz/cm2 at a reasonable cost. Currently, the high-energy physics experiments are heading for high-rate or high-luminosity experiments to explore new physics phenomena. The corresponding high-rate experimental environment brings a new challenge to the rate capability of MRPC. One kind of low resistive glass had been proven to be able to increase the rate capability of MRPC to about 30kHz/cm2. However, the maximum dimension of the low resistive glass is 30 · 33 cm2 due to the craftsmanship, which limits the maximum dimension of the MRPC. Breaking the dimension limit of the low resistive glass MRPC will expand its usage, but a larger MRPC needs a bigger gas box, which indicates increased gas consumption. To break the dimension limit and limit the gas usage in the meanwhile, a sealed mosaic high-rate MRPC based on the low resistive glass has been developed. The test results show it has an global efficiency of about 95% and the time resolution could reach 70ps. The design has been proven to be feasible.
