arXiv physics/02100452002-10-10physics.ins-det

Preliminary results of an aging test of RPC chambers for the LHCb Muon System

Andrea Bizzeti, Giovanni Carboni, Gianmaria Collazuol, Stefano De Capua, Danilo Domenici, Gerardo Ganis, Roberto Messi, Giovanni Passaleva, Emanuele Santovetti, Michele Veltri

备注：: 4 pages, 6 figures, presented at RPC2001, VIth Workshop on Resistive Plate Chambers and Related Detectors, November 26-27 2001, Coimbra, Portugal
发表信息：: Nucl.Instrum.Meth. A508 (2003) 166-169
DOI：: 10.1016/S0168-9002(03)01344-5

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The preliminary results of an aging test performed at the CERN Gamma Irradiation Facility on a single--gap RPC prototype developed for the LHCb Muon System are presented. The results are based on an accumulated charge density of 0.42 C/cm^2, corresponding to about 4 years of LHCb running at the highest background rate. We observe a rise in the dark current and noise measured with source off. The current drawn with source on steadily decreased, possibly indicating an increase of resistivity of the chamber plates. The performance of the chamber, studied with a muon beam under several photon flux values, is found to still fulfill the LHCb operation requirements.

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