A Multi-strip Multi-gap RPC Barrel for Time-of-Flight Measurements

作者：Kis, M.^*; Ciobanu, M.; Deppner, I.; Hildenbrand, K. D.; Herrmann, N.; Kang, T. I.; Kim, Y. J.; Koczon, P.; Leifels, Y.; Marquardt, M.; Petrovici, M.; Piasecki, K.; Ryu, M. S.; Schuettauf, A.; Simion, V.; Weinert, J.; Zhang, X.

来源：Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment , 2011, 646(1): 27-34.

DOI：10.1016/j.nima.2011.02.076

• FOPI
• MMRPC
• Timing RPC
• ToF
• Multi-strip
• Segmented anode

The FOPI detector [1] at the heavy-ion synchrotron SIS-18 at GSI in Darmstadt has upgraded part of its time-of-flight (ToF) system by adding a new sub-detector shell (called the MMRPC Barrel) that is made out of Multi-strip Multi-gap Resistive-Plate Counters (MMRPCs). The MMRPC Barrel has an active area of 5 m(2) covered by 2400 individual anode strips [2,3] which are read out at both ends by custom-designed electronics [4,5]. With these multi-strip anodes we have obtained an enhanced detector granularity with 95% efficiency and a ToF resolution sigma(ToF) better than 90 ps which increases the identification limit for charged kaons up to laboratory momenta of at least 1 GeV/c. In this paper we report on the design, construction and operational characteristics of the MMRPC Barrel and describe its performance during the first experiments.

• 出版日期2011-8-1