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.
@article{arxiv.physics/0410264,
title = {Ageing test of the ATLAS RPCs at X5-GIF},
author = {G. Aielli and M. Alviggi and V. Ammosov and M. Biglietti and P. Camarri and V. Canale and M. Caprio and R. Cardarelli and G. Carlino and G. Cataldi and G. Chiodini and F. Conventi and R. de Asmundis and M. Della Pietra and D. Della Volpe and A. Di Ciaccio and A. Di Simone and L. Di Stante and E. Gorini and F. Grancagnolo and P. Iengo and B. Liberti and A. Nisati and Fr. Pastore and E. Pastori and S. Patricelli and R. Perrino and M. Primavera and R. Santonico and G. Sekhniaidze and S. Spagnolo and Yu. Sviridov and R. Vari and S. Veneziano and V. Zaets},
journal= {arXiv preprint arXiv:physics/0410264},
year = {2009}
}
Comments
4 pages. Presented at the VII Workshop on Resistive Plate Chambers and Related Detectors; Clermont-Ferrand October 20th-22nd, 2003