  The future Facility for Anti-proton and Ion Research (FAIR), currently in
construction in Darmstadt, Germany, is one of the largest research projects
worldwide. The Compressed Baryonic Matter (CBM) experiment is one of the main
pillars at FAIR, studying the quantum chromodynamics (QCD) phase diagram at
high baryon densities with unprecedented interaction rate in heavy ion
collisions up to 10 MHz. This requires new data-driven readout chain, new data
analysis methods and high-rate capable detector systems. The task of the CBM
Time of Flight wall (CBM-TOF) is the charged particle identification. Multi-gap
Resistive Plate Chambers (MRPCs) with different rate capabilities will be used
at CBM-TOF corresponding regions. To reduce the commissioning time for CBM, a
CBM full system test-setup called mini-CBM (mCBM) had been installed and tested
with beams at GSI SIS18 facility in 2019. The high-rate MRPC prototypes
developed at Tsinghua University, called MRPC2, were selected to be implemented
in mTOF modules for mCBM. Additional thin float glass MRPCs from USTC called
MRPC3, foreseen for the CBM lower rate region, were also tested in the mCBM
experiment. Performance results of the two kinds of MRPCs analyzed by the so
called tracking method will be shown.
