Construction and performance of multigap RPC in streamer and avalanche modes

Hoshi, Y.; Neichi, K.; Yamaguchi, A.

doi:10.1016/j.nima.2008.12.185

Cited by 3 publications

(1 citation statement)

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“…MRPC Modules of 6 gas-gaps of 0.220 mm and pad area of 20 cm 2 , developed for the STAR experiment at RHIC, have a time resolution of the order of 60 ps [7,8]. The MRPC detectors have also been tested in streamer and avalanche modes [9]. The studies on the gas mixture also show that the baseline mixture of about 90% of C 2 F 4 H 2 , about 5% of C 4 H 10 and the rest of SF 6 is suited for the detectors [10].…”

Section: Introductionmentioning

confidence: 99%

Design, development and performance study of six-gap glass MRPC detectors

et al. 2016

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The multigap resistive plate chambers (MRPCs) are gas ionization detectors with multiple gas sub-gaps made of resistive electrodes. The high voltage (HV) is applied on the outer surfaces of outermost resistive plates only, while the interior plates are left electrically floating. The presence of multiple narrow sub-gaps with high electric field results in faster signals on the outer electrodes, thus improving the detector's time resolution. Due to their excellent performance and relatively low cost, the MRPC detector has found potential application in time-of-flight (TOF) systems. Here we present the design, fabrication, optimization of the operating parameters such as the HV, the gas mixture composition, and, performance of six-gap glass MRPC detectors of area 27 cm × 27 cm, which are developed in order to find application as trigger detectors, in TOF measurement etc. The design has been optimized with unique spacers and blockers to ensure a proper gas flow through the narrow sub-gaps, which are 250 µm wide. The gas mixture consisting of R134A, Isobutane and SF 6 , and the fraction of each constituting gases has been optimized after studying the MRPC performance for a set of different concentrations. The counting efficiency of the MRPC is about 95% at 17.9 kV. At the same operating voltage, the time resolution, after correcting for the walk effect, is found to be about 219 ps.

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