Speaker
Description
The end-cap Time-of-Flight (E-TOF) system of Beijing Spectrometer (BESIII) is now upgrading based on the Multi-gapResistive Plate Chamber(MRPC) technology. The beam test for the MRPC prototype, together with the custom-designed Front End Electronics (FEE) and TDC boards, shows a time resolution of better than 50 ps. The final version of trapezium MRPC module has 2×6 gas gaps of 0.22mm thick. The signals are picked up by 12 strips with different length and read out from both ends of each strip. BESIII end-cap ring will be fully covered by 2×36 trapezium MRPC modules. The mass production and test of whole modules are carried on the group in USTC. The test results show that the produced MRPCs’ have stable performance and meet the quality standard in mass production. In consideration of the correction from the muon momentum distribution and the statistical effects, a time resolution together with readout electronics of better than 60 ps can be achieved by the cosmic ray test.
