Laser beam studies of RPC behaviour in avalanche mode
نویسندگان
چکیده
Primary ionization is created inside the gas gap of a small size ð10 20 cmÞ RPC, analogous to the RPC of the ATLAS muon detector, by focusing a pulsed (width p0:5 ns) nitrogen laser beam (transverse diameter E15 mm). With this set-up we can characterize the behaviour of the RPC by measuring such parameters as drift velocity and gas amplification. For an ATLAS-like gas mixture (97% C2H2F4; 3% isobutane and a small addition of SF6), we have evidence of a space charge influence on RPC rate capability. r 2003 Elsevier B.V. All rights reserved.
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