Physics – Instrumentation and Detectors
Scientific paper
2004-10-27
Nucl.Instrum.Meth. A533 (2004) 98-101
Physics
Instrumentation and Detectors
4 pages. Presented at the VII Workshop on Resistive Plate Chambers and Related Detectors; Clermont-Ferrand October 20th-22nd,
Scientific paper
10.1016/j.nima.2004.07.008
An ageing test of three ATLAS production RPC stations is in course at X5-GIF, the CERN irradiation facility. The chamber efficiencies are monitored using cosmic rays triggered by a scintillator hodoscope. Higher statistics measurements are made when the X5 muon beam is available. We report here the measurements of the efficiency versus operating voltage at different source intensities, up to a maximum counting rate of about 700Hz/cm^2. We describe the performance of the chambers during the test up to an overall ageing of 4 ATLAS equivalent years corresponding to an integrated charge of 0.12C/cm^2, including a safety factor of 5.
Aielli G.
Alviggi M.
Ammosov Vladimir
Asmundis R. de
Biglietti M.
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