We show that the addition of small amounts of sulphur hexafluoride, SF6, to the present ATLAS baseline gas mixture C2H2F4/C4H10 has a very strong effect in suppressing the avalanche-to-streamer transition. An RPC of 50 x 50 cm(2) area, 2 mm gas gap was operated in pure avalanche, streamer-free mode in a voltage range of about 1 kV. The results of the test suggest that the observed fast signal could be interpreted as the sum of contributions of a number of primary saturated avalanches. (C) 1998 Elsevier Science B.V. All rights reserved.
Camarri, P., Cardarelli, R., DI CIACCIO, A., Santonico, R. (1998). Streamer suppression with SF6 in RPCs operated in avalanche mode. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH. SECTION A, ACCELERATORS, SPECTROMETERS, DETECTORS AND ASSOCIATED EQUIPMENT, 414, 317-324 [10.1016/S0168-9002(98)00576-2].
Streamer suppression with SF6 in RPCs operated in avalanche mode
CAMARRI, PAOLO;DI CIACCIO, ANNA;SANTONICO, RINALDO
1998-09-11
Abstract
We show that the addition of small amounts of sulphur hexafluoride, SF6, to the present ATLAS baseline gas mixture C2H2F4/C4H10 has a very strong effect in suppressing the avalanche-to-streamer transition. An RPC of 50 x 50 cm(2) area, 2 mm gas gap was operated in pure avalanche, streamer-free mode in a voltage range of about 1 kV. The results of the test suggest that the observed fast signal could be interpreted as the sum of contributions of a number of primary saturated avalanches. (C) 1998 Elsevier Science B.V. All rights reserved.| File | Dimensione | Formato | |
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