High radiation tests of the MWPCs for the LHCb Muon System

The MultiWire Proportional Chambers (MWPCs) for the LHCb Muon Detector were subjected to an ageing test, performed in the high-radiation environment of the Calliope Gamma Facility of the ENEA-Casaccia Research Centre. The test showed that the MWPCs can safely operate for many years in a high intensity particle flux. An additional test, performed with the CERN Gamma Irradiation Facility (GIF), confirmed these conclusions.