Aging study for resistive plate chambers of the CMS muon trigger detector

摘要

A long-term aging test of a Resistive Plate Chamber (RPC) was carried out with an intense gamma ~(137)Cs source. The detector was operated in avalanche mode and had the bakelite surface treated with linseed oil. After the irradiation the estimated dose, charge and fluence were approximately equal to the expected values after 10 years of operation in the CMS barrel region. During and after the irradiation, the RPC performance was monitored with cosmic muons and showed no relevant aging effects. Moreover, no variation of the bakelite resistance was observed.