Speaker
Description
The future fixed target high-rate Compressed Baryonic Matter (CBM) experiment is one of the experimental pillars of the Facility for Antiproton and Ion Research (FAIR) located in Darmstadt/Germany. Since CBM aims to operate at an interaction rate of up to 10 MHz for Au+Au collisions radiation hard and high rate capable detector have to be installed. In order to provide an excellent particle identification (PID) of charged hadrons the CBM Time-Of-Flight (TOF) group has developed a concept of a 120 m$^2$ large TOF wall with a system time resolution below 80 ps based on Multi-gap Resistive Plate Chambers (MRPC) with rate capabilities above 30 kHz/cm$^2$. The MRPC detectors were extensively tested in terms of efficiency, time resolution and rate capability in several beam campaigns at particle fluxes of up to a 30 kHz/cm$^2$ and reached by now the close to final design. The hereby observed aging phenomena of MRPCs, mainly arising during operation at high rates, will be discussed in this presentation together with the for CBM contemplable mitigation strategies.
