A 2 mm gas gap Resistive Plate Chamber with bakelite plates has been operated in avalanche mode with a 137Cs source. We report measurements of the efficiency for a cosmic ray detection and the charge developed in the gap, performed for two different gas mixtures: the first containing a high percentage of environmental friendly "freon" C2H2F4; the second one having a high percentage of argon. We show that the freon-based mixture exhibits a wide full-efficiency plateau with low streamer probability, while the argon-based mixture allows a reduction in the detector power consumption.
Abbrescia, M., Colaleo, A., Iaselli, G., Maggi, M., Marangelli, B., Natali, S., et al. (1997). Performance of a resistive plate chamber operated in avalanche mode under 137Cs irradiation. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH. SECTION A, ACCELERATORS, SPECTROMETERS, DETECTORS AND ASSOCIATED EQUIPMENT, 392(1-3), 155-160 [10.1016/S0168-9002(97)00240-4].
Performance of a resistive plate chamber operated in avalanche mode under 137Cs irradiation
Gianini G;
1997
Abstract
A 2 mm gas gap Resistive Plate Chamber with bakelite plates has been operated in avalanche mode with a 137Cs source. We report measurements of the efficiency for a cosmic ray detection and the charge developed in the gap, performed for two different gas mixtures: the first containing a high percentage of environmental friendly "freon" C2H2F4; the second one having a high percentage of argon. We show that the freon-based mixture exhibits a wide full-efficiency plateau with low streamer probability, while the argon-based mixture allows a reduction in the detector power consumption.
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