Abstract: Multi-gap Resistive Plate Chamber (MRPC) is a new type of gas detector developed on the base of RPC and it has been applied in many large hadrons experiments to construct time of flight system. Compared with other gas detector, MRPC has relatively narrow gasp gap and its performance is strongly dependent on gas quality. With accelerator luminosity continually growing in recent...
RPCs operated in streamer mode are still a detector of potential interest in neutrino and astro-particle physics applications (like OPERA and ARGO experiments). Such experiments are typically characterized by large area apparatuses with no stringent requirements on detector aging and rate capabilities. More than 40 gas mixtures obtained by combining 10 different gases have been tested using...
The RPC performance is strongly dependent on the material used for the resistive electrodes. It must combine indeed an electrical resistivity adequate to the expected operation rate with a good mechanical strength to insure the gas gap uniformity. New materials are considered and some experimental results at cosmic ray rates are presented
The India-based Neutrino Observatory (INO) collaboration has proposed to build a 50kton magnetized Iron Calorimeter (ICAL). Main aims of this experiment are to precisely measure the atmospheric neutrino oscillation parameters and to determine the ordering of neutrino masses. The collaboration has chosen Resistive Plate Chambers (RPCs) made up of float glass electrodes of 1.9 m × 1.8 m in area...
A new Gamma Irradiation Facility (GIF++) to test detectors for the HL-LHC program is available at CERN and has started to be operational in 2015. This is a unique place where high energy charged particle beams (muon beam with momentum up to 100 GeV/c) are combined with a 14 TBq 137 Cesium source. The increase in luminosity at the HL-LHC will produce a higher particle background and the effects...
The operations of Resistive Plate Chambers in LHC experiments require F-based gases for optimal performance. Recent regulations demand the use of environmentally unfriendly F-based gases to be limited or banned. In view of the CMS experiment upgrade several tests are ongoing to measure the performance of the detector in terms of efficiency, streamer probability, induced charge and time...
Further gas mixtures with low envoirment impact have been tested. For the best RPC performance the main effort was to look for a mixture giving a confortable separation between avalanche and streamer and a gas density ensuring sufficient primary ionization. The measurements have been carried out on small size chambers at cosmic ray rates using the waveforms recorded on the oscilloscope....
