Longevity Study on the CMS Resistive Plate Chambers for HL-LHC

• Published in: arXiv.org
• Main Authors: Aly, R, on behalf of the CMS Collaboration
• Format: Paper Journal Article
• Language: English
• Published: Ithaca Cornell University Library, arXiv.org 27.11.2021
• Subjects: Detectors; Gamma irradiation; Gamma rays; Large Hadron Collider; Longevity; Luminosity; Physics - High Energy Physics - Experiment; Physics - Instrumentation and Detectors; Resistive plate chambers; Sensors; Solenoids
• ISSN: 2331-8422
• DOI: 10.48550/arxiv.2111.13995

The CMS Resistive Plate Chamber (RPC) system has been certified for 10 years of LHC operation. In the next years, during the High luminosity LHC (HL-LHC) phase, the LHC instantaneous luminosity will increase to a factor five more than the existing LHC luminosity. This will subject the present CMS RPC system to background rates and operating conditions much higher with respect to those for which the detectors have been designed. Those conditions could affect the detector properties and introduce nonrecoverable aging effects. A dedicated longevity test is set up in the CERN Gamma Irradiation Facility (GIF++) to determine if the present RPC detectors can survive the hard background conditions during the HL-LHC running period. During the irradiation test, the RPC detectors are exposed to a high gamma radiation for a long period and the detector main parameters are monitored as a function of the integrated charge. Based on collecting a large fraction of the expected integrated charge at the LH-LHC, The results of the irradiation test will be presented.