Performance of multigap resistive plate chambers with pure Freon 134a

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• 作者：K. Doroud^a ; D. Hatzifotiadou^b ; D.W. Kim^a ; ^c ; ^{Do.Won.Kim@cern.ch} ; J.S. Kim^c ; M.M. Kim^a ; ^c ; J. Seo^a ; ^d ; M.C.S. Williams^b ; A. Zichichi^b ; ^e
• 关键词：Resistive plate chambers ; MRPC ; ALICE ; Time of flight ; SF₆ ; Freon 134a ; Multigap
• 刊名：Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
• 出版年：2011
• 出版时间：11 February 2011
• 年：2011
• 卷：629
• 期：1
• 页码：106-110
• 全文大小：944 K

文摘

The performance of Multigap Resistive Plate Chambers (MRPCs) with pure Freon 134a was investigated. Two types of MRPCs with different number of gaps and different gap width have been studied; one with 10 gaps of and the other with 24 gaps of . From the beam tests performed at CERN, the time resolution of the MRPCs flushed with pure Freon has been found to be the same as when SF₆ was added to Freon. The 10 gap MRPC has a time resolution better than 50 ps and the 24 gap MRPC has a resolution of 21 ps, at full efficiency and with no streamers. With pure Freon, the streamers start to develop at a lower electric field.