Author/Authors :
Wang، نويسنده , , Y. and Chen، نويسنده , , H.S. and DING، نويسنده , , W.C. and Qiu، نويسنده , , X.Z. and Wang، نويسنده , , J.B. and Zhu، نويسنده , , X.L. and Kang، نويسنده , , K.J. and Cheng، نويسنده , , J.P. and Li، نويسنده , , Y.J. and Ruan، نويسنده , , L. and Xu، نويسنده , , Z. and Asselta، نويسنده , , K. and Christie، نويسنده , , W. and DʹAgostino، نويسنده , , C. N. Dunlop، نويسنده , , J. Boese-Landgraf، نويسنده , , J. and Ljubicic، نويسنده , , T. and ، نويسنده ,
Abstract :
A new prototype of a Long-Strip Multi-Gap Resistive Plate Chamber (LMRPC) for the STAR Muon Telescope Detector (MTD) at RHIC has been developed. This prototype has an active area of 52×90 cm2 and consists of six 250 μm wide gaps. Each detector has 12 strips, read-out at both ends, which are each 3.8 cm wide and 90 cm long with 0.6 cm intervals. In cosmic-ray tests, the efficiency was larger than 95% and the time resolution was ∼75 ps for the 94% Freon, 5% iso-butane, and 1% SF6 gas mixture. There was good uniformity in the performance across the different strips. The module was also tested in a proton beam at IHEP in Beijing. The efficiency was close to 100% and the best timing resolution achieved was 55 ps for the 90% Freon, 5% iso-butane, and 5% SF6 gas mixture. Trigger scans along and across the strip direction were also performed.
Keywords :
Wide strip , Beam test , Time of flight , MRPC , Muon telescope detector
