TY - JOUR
T1 - Aging tests and chemical analysis of Resistive Plate Chambers for the trigger of the ALICE dimuon arm
AU - Arnaldi, R.
AU - Chiavassa, E.
AU - Colla, A.
AU - Cortese, P.
AU - Dellacasa, G.
AU - De Marco, N.
AU - Ferretti, A.
AU - Gallio, M.
AU - Guernane, R.
AU - Mereu, P.
AU - Musso, A.
AU - Oppedisano, C.
AU - Piccotti, A.
AU - Poggio, F.
AU - Scomparin, E.
AU - Sigaudo, F.
AU - Travaglia, G.
AU - Vercellin, E.
AU - Yermia, F.
PY - 2004/11/1
Y1 - 2004/11/1
N2 - Resistive Plate Chambers operated in streamer mode have been chosen as trigger detectors for the forward dimuon spectrometer of the ALICE experiment. During tests performed at CERN PS, small size prototypes with low-resistivity bakelite electrodes and with a strongly quenched gas mixture have shown the required rate capability, tracking and timing properties. Present efforts are devoted to the study of the detector performance after long irradiation periods. In this paper, a summary of the results of aging tests performed at the Gamma Irradiation Facility at CERN will be presented. Detectors show quite stable performance up to about 50mC/cm2, as the requirements for 10 years operation, program at LHC including a safety factor of 2. Afterwards, we observed an increase of the dark current not associated with an increase of the counting rate. We also report results of chemical analysis carried out by different CERN teams on exhaust gases and electrode surfaces of the detectors after aging.
AB - Resistive Plate Chambers operated in streamer mode have been chosen as trigger detectors for the forward dimuon spectrometer of the ALICE experiment. During tests performed at CERN PS, small size prototypes with low-resistivity bakelite electrodes and with a strongly quenched gas mixture have shown the required rate capability, tracking and timing properties. Present efforts are devoted to the study of the detector performance after long irradiation periods. In this paper, a summary of the results of aging tests performed at the Gamma Irradiation Facility at CERN will be presented. Detectors show quite stable performance up to about 50mC/cm2, as the requirements for 10 years operation, program at LHC including a safety factor of 2. Afterwards, we observed an increase of the dark current not associated with an increase of the counting rate. We also report results of chemical analysis carried out by different CERN teams on exhaust gases and electrode surfaces of the detectors after aging.
KW - Aging
KW - Resistive plate chamber
KW - Streamer
UR - http://www.scopus.com/inward/record.url?scp=7044248011&partnerID=8YFLogxK
U2 - 10.1016/j.nima.2004.07.011
DO - 10.1016/j.nima.2004.07.011
M3 - Conference article
SN - 0168-9002
VL - 533
SP - 112
EP - 115
JO - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
IS - 1-2
T2 - Proceedings of the Seventh International Workshop on Resistive
Y2 - 20 October 2003 through 22 October 2003
ER -