12-18 August 2012
US/Eastern timezone

If you have any questions about the details of the program please contact Bolek Wyslouch

Two real-size high-rate MRPC modules for CBM-TOF

16 Aug 2012, 16:00
2h
Regency 1/3 and Ambassador ()

Regency 1/3 and Ambassador

Poster Experiment upgrades, new facilities, and instrumentation Poster Session Reception

Speaker

Mr Jingbo Wang (Department of Engineering Physics, Tsinghua University, Key Laboratory of Particle & Radiation Imaging, Ministry of Education, Beijing 100084, China)

Description

The Compressed Baryonic Matter experiment at the future Facility for Antiproton and Ion Research will use a time-of-flight (TOF) wall for hadron identification, based on the MRPC technology. The challenge is to keep high efficiencies (above 90%) and good time resolutions (less than 80ps) at particle fluxes up to 20kHz/cm2, which is not accessible to conventional float-glass MRPCs. For this purpose, a type of low-resistivity doped glass with bulk resistivity on the order of 1010 Ωcm was produced at Tsinghua University. Several high-rate prototypes based on this material have been developed and tested in beam. In the current conceptual design, the whole CBM-TOF wall is arranged in four “rate regions”. In the inner region of the wall (region 1), pad readout MRPCs based on low-resistive glass can be efficiently used to cope with the high particle fluxes and granularities (above 20 kHz/cm2), while strip-readout MRPCs represent a natural choice for the outer region where the system occupancy is orders of magnitude lower. Recently, our effort is to realistically adapt the MRPC geometry to suit the conceptual design of the TOF wall. Two kinds of real-size MRPC modules made of low-resistivity doped glass were developed, and beam tested were performed both with protons at the Electron Linac with high Brilliance and low Emittance (ELBE) facility at Helmholtz-Zentrum Dresden-Rossendorf (HZDR). We summarize here the results from the latest beam test of the two real-size modules at ELBE facility at HZDR. The counters show high efficiencies above 90%, and time resolutions (MRPC+FEE) down to 60ps, at particle flux up to 100 kHz/cm2, thus fulfill the CBM requirements.

Primary author

Mr Jingbo Wang (Department of Engineering Physics, Tsinghua University, Key Laboratory of Particle & Radiation Imaging, Ministry of Education, Beijing 100084, China)

Co-authors

Mr Huangshan Chen (Department of Engineering Physics, Tsinghua University, Key Laboratory of Particle & Radiation Imaging, Ministry of Education, Beijing 100084, China) Mr Xingming Fan (Department of Engineering Physics, Tsinghua University, Key Laboratory of Particle & Radiation Imaging, Ministry of Education, Beijing 100084, China) Prof. Yi Wang (Department of Engineering Physics, Tsinghua University, Key Laboratory of Particle & Radiation Imaging, Ministry of Education, Beijing 100084, China)

Presentation Materials