X. Workshop on Resistive Plate Chambers and Related Detectors

The response of RPC detectors is highly sensitive to environmental parameters. A novel approach is presented to model the response of RPC detectors in a variety of experimental conditions. The algorithm, based on neural networks, has been developed and tested on the CMS RPC gas gain monitoring system during operation at the scaled-down prototype recirculation gas system.

A new Resistive Plate Chamber (RPC) based fast muon trigger system has been developed and partially installed in the PHENIX experiment. This new trigger will allow the PHENIX data acquisition system to efficiently sample high pT (> 20 GeV/c) muons from W decays in polarized proton+proton collisions at ps = 500 GeV at the Relativistic Heavy Ion Collider at Brookhaven National Laboratory. This...

Following the invention of the Resistive Plate Chamber (RPC) more than 29 years ago1, RPC systems with two major types of Bakelite electrodes have been used in L3 and BaBar, and are presently being used by CMS, ATLAS, STAR, ALICE ToF, and a variety of cosmic ray and neutrino experiments, such as ARGO-YBJ, OPERA and Daya Bay. In recent years the BESIII Muon group of IHEP (Beijing), together...

The efficiency of recovery achieved by open or closed loop extraction of RPC exhaust gases is in the range of 90% to 95% under optimum conditions. For a large detector setup operating on one volume change per day basis, a 5% loss amounts to discharging 50 kg of R134a and 0.5 kg of SF6 into atmosphere every day. The emissions are equivalent to creating nearly 50,000 m3 of Carbon dioxide daily....

RPCs are widely used in the present LHC experiments, with gas mixtures usually made out of C2H2F4/i-C4H10/SF6 (the "standard mixture"). RPCs assure a nice overall performance, with efficiencies greater than 95%, time resolution of the ns order, and rate capability reaching 1kHz/cm2. However, the standard mixture presents some drawbacks. As a first point, RPCs reach maximum efficiency at...

Resistive Plate Chambers (RPCs) thanks to their high time resolution (~1 ns), a suitable space resolution (~1 cm) and the low production cost (~25 €/m2) are widely employed for the muon trigger system at the Large Hadron Collider (LHC) experiments where they are covering a surface of about 4000 m2 (16 m3 of gas volume) both in ATLAS and in CMS. The large detector volume and the use of a...