F. Ceradini

Performance of a uranium/tetramethylpentane electromagnetic calorimeter

Abstract A calorimeter, consisting of uranium plates and thin liquid ionization chambers filled with tetramethylpentane (TMP) at room temperature, has been tested using electrons between 10 and 70 GeV. The essential characteristics of the liquid are discussed, including measurements of the free electron lifetime. Results on uniformity, linearity and energy resolution are described and some information on the response to hadrons has been obtained. A single TMP box containing four electrodes and a TMP position detector for electromagnetic showers have also been tested.

TEST OF A RESISTIVE PLATE CHAMBER OPERATING WITH LOW GAS AMPLIFICATION AT HIGH-INTENSITY BEAMS

Abstract We present results on efficiency and time resolution of a resistive plate chamber operating at low gas amplification. The measurements were done within the programme of the RD5 experiment at CERN with a pion beam of flux 0.1–3.9 kHz/cm2.

Study of resistive plate chambers for muon detection at hadron colliders

Abstract We present the performance of a hodoscope made of resistive plate chambers (RPC) installed in the RD5 experiment at CERN and exposed to beams of high energy muons and pions. The efficiency as a function of the particle flux is studied for different resistivities. A substantial improvement is obtained with plates of lower resistivity. Tracking muons through the RPC and using the bending power of a 2.7 Tm iron toroid, a simple trigger algorithm is used to select large momentum muons.

A hodoscope made of resistive plate chambers to identify muons in a fixed targed beauty hadroproduction experiment

Abstract We have built a large area hodoscope to identify muons from semileptonic decays of beauty particles produced in the WA92 experiment at the CERN Super-Proton-Synchrotron. The hodoscope is made of resistive electrode chambers read out with strips of 3 cm pitch. The hodoscope has a fast response with a time resolution of 5 ns and a space resolution of 1 cm. A fast trigger processor selects straight tracks pointing to the interaction vertex in a fixed processing time of 90 ns.

Measurement of the efficiency and time resolution of double-gap resistive plate chambers

Abstract We describe a detector built by assembling together two resistive plate chambers and read out by a single median electrode plane segmented in strips. We present results of measurements of the efficiency and of the time response as a function of the particle flux.

Muon tracking and hadron punchthrough measurements using resistive plate nhambers

Abstract Study of high energy muon tracking and measurements of punchthrough probability for showers of charged hadrons with momenta 40, 70, 80 and 150 GeV/ c have been performed at the CERN SPS test beams using resistive electrode plate chambers. The results are compared with Monte Carlo predictions and with measurements from other experiments.

Test of a resistive plate chamber under irradiation of photons and neutrons

Abstract A resistive plate chamber operated at low gas amplification has been exposed to photon and neutron sources to study the detection efficiency and the time response in conditions close to those expected in experiments at the Large Hadron Collider. Results on the sensitivity to photons and neutrons of energy around 1 MeV are presented.

Measurement of Hadron Shower Punchthrough In Iron

The total punchthrough probability of showers produced by negatively charged pions of momenta 30, 40, 50, 75, 100, 200 and 300 GeV/c, has been measured in the RD5 experiment at CERN using a toroidal spectrometer. The range of the measurement extends to 5.3 m of equivalent iron. Our results have been obtained by two different analysis methods and are compared with the resutls of a previous experiment.