R&D of a real-size mosaic MRPC within the framework of the CMS muon upgrade

Yu Y.; Han D.; Wang Y.; Guo B.; Lyu P.; Chen X.; Shen C.; Wang F.; Li Y.; Cimmino A.; Crucy S.; Fagot A.; Gul M.; Rios A. A. O.; Tytgat M.; Zaganidis N.; Aly S.; Assran Y.; Radi A.; Sayed A.; Singh G.; Abbrescia M.; Iaselli G.; Maggi M.; Pugliese G.; Verwilligen P.; Van Doninck W.; Colafranceschi S.; Sharma A.; Benussi L.; Bianco S.; Piccolo D.; Primavera F.; Bhatnagar V.; Kumari R.; Mehta A.; Singh J.; Ahmad A.; Ahmed W.; Asghar M. I.; Awan I. M.; Hoorani R.; Muhammad S.; Shahzad H.; Shah M. A.; Cho S. W.; Choi S. Y.; Hong B.; Kang M. H.; Lee K. S.; Lim J. H.; Park S. K.; Kim M. S.; Bernardino S. C.; Pedraza I.; Estrada C. U.; Moreno S. C.; Valencia F. V.; Pant L. M.; Buontempo S.; Cavallo N.; Esposito M.; Fabozzi F.; Lanza G.; Orso I.; Lista L.; Meola S.; Merola M.; Paolucci P.; Thyssen F.; Braghieri A.; Magnani A.; Montagna P.; Riccardi C.; Salvini P.; Vai I.; Vitulo P.; Ban Y.; Qian S. J.; Choi M.; Choi Y.; Goh J.; Kim D.; Aleksandrov A.; Hadjiiska R.; Iaydjiev P.; Rodozov M.; Stoykova S.; Sultanov G.; Vutova M.; Dimitrov A.; Litov L.; Pavlov B.; Petkov P.; Bagaturia I.; Lomidze D.; Avila C.; Cabrera A.; Sanabria J. C.; Crotty I.; Vaitkus J.

doi:10.1088/1748-0221/14/10/C10042

Based on previous experience and attempt, a real-size mosaic Multi-gap Resistive Plate Chamber (MRPC) has been developed within the framework of the CMS muon upgrade efforts. The chamber is a 5-gap with plates made each of 6 pieces of low resistive glass. Cosmic ray test at CERN 904 shows that its efficiency can reach above 95% with a gas mixture of 90% C2H2F4, 5% i-C4H10and 5% SF6. The chamber was also tested with CMS dry gas(95.2% C2H2F4, 4.5% i-C4H10, 0.3% SF6) at the CERN Gamma Irradiation Facility (GIF++). Efficiency results calculated by a simple tracking method show that the good performance is maintained at rates up to 10 kHz/cm2.