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 700 Hz/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 0.12 C/cm(2), including a safety factor of 5. (C) 2004 Elsevier B.V. All rights reserved. RI Perrino, Roberto/B-4633-2010; Veneziano, Stefano/J-1610-2012; spagnolo, stefania/A-6359-2012
Ageing test of the ATLAS RPCs at X5-GIF
CONVENTI, Francesco Alessandro;DELLA PIETRA, Massimo;
2004-01-01
Abstract
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 700 Hz/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 0.12 C/cm(2), including a safety factor of 5. (C) 2004 Elsevier B.V. All rights reserved. RI Perrino, Roberto/B-4633-2010; Veneziano, Stefano/J-1610-2012; spagnolo, stefania/A-6359-2012I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
