We present the final results of an extensive aging test, performed at the CERN Gamma Irradiation Facility on two bakelite Resistive Plate Chambers (RPC) detectors. With a method based on a model describing the behaviour of an RPC under high particle flux conditions, we have periodically measured the electrode resistivity r of the two RPC prototypes over 3 years. We observed a large spontaneous increase of r with time, from the initial value of about 1010 O cm to more than 200 1010 O cm. A corresponding degradation of the RPC rate capabilities, from more than 3 kHz=cm2 to less than 200 Hz=cm2, was observed; the reversibility of the process, using a humid gas mixture, has also been studied. We also present a study of the effects of humidity on the bakelite resistivity using two 10 10 cm2 bakelite samples.
Carboni, G., Collazuol, G., De Capua, S., Domenici, D., Messi, R., Passaleva, G., et al. (2004). Final results from an extensive ageing test of bakelite Resistive Plate Chambers. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH. SECTION A, ACCELERATORS, SPECTROMETERS, DETECTORS AND ASSOCIATED EQUIPMENT, 533(1-2), 107-111 [10.1016/j.nima.2004.07.010].
Final results from an extensive ageing test of bakelite Resistive Plate Chambers
Carboni, G.;De Capua, S.
;Messi, R.;Santovetti, E.Membro del Collaboration Group
;
2004-01-01
Abstract
We present the final results of an extensive aging test, performed at the CERN Gamma Irradiation Facility on two bakelite Resistive Plate Chambers (RPC) detectors. With a method based on a model describing the behaviour of an RPC under high particle flux conditions, we have periodically measured the electrode resistivity r of the two RPC prototypes over 3 years. We observed a large spontaneous increase of r with time, from the initial value of about 1010 O cm to more than 200 1010 O cm. A corresponding degradation of the RPC rate capabilities, from more than 3 kHz=cm2 to less than 200 Hz=cm2, was observed; the reversibility of the process, using a humid gas mixture, has also been studied. We also present a study of the effects of humidity on the bakelite resistivity using two 10 10 cm2 bakelite samples.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
