Falsetti, G. and Ballabene, E. and Bruni, A. and Chiarini, A. (2025) Validation and Certification of the RPC-BI chambers for the ATLAS Muon Spectrometer Phase-II upgrade. Il nuovo cimento C, 48 (3). pp. 1-6. ISSN 1826-9885
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Abstract
The ATLAS experiment has started the construction of a layer of Resistive Plate Chambers (RPC) to be installed during the long shutdown LS3 (2026-2029), above the MDT tracking chambers of the innermost layer of the barrel muon spectrometer. These new detectors will participate, along with the other RPC chambers already present in the spectrometer, in the very rapid selection (trigger) of charged particles in small momentum intervals. The RPC chambers will consist of a triple layer of detectors that, at the luminosity of High Luminosity LHC, will have a detection efficiency of 80% per single layer (99.2% per chamber), a time resolution better than 400 ps, and a spatial resolution better than 6 mm in the η direction and 15 mm in the φ direction. The construction of the RPC detectors in the Large sectors (RPC-BIL), a joint effort by the INFN groups in Rome1, Rome2, Bologna and Cosenza, began in June 2023 and will continue until the start of LS3, scheduled for 2026. The assembly of the 130 RPC-BIL chambers will be carried out at the CERN laboratories. Each assembly phase is followed by quality tests. Specifically, the individual detectors of each chamber (singlets) are qualified into a cosmic ray tracking test station. The station allows for a complete measurement of detection efficiency and the percentage of streamers as a function of the operating voltage. The trigger chambers of the station are the ATLAS RPC detectors. Therefore the test stand integrates both the existing ATLAS system and the Phase-II detectors; as such it serves as a validation system for the individual detectors and complete chambers and as a study system for the integration of the two technologies. This work presents the first results and the potential of this test system.
| Item Type: | Article |
|---|---|
| Subjects: | 500 Scienze naturali e Matematica > 530 Fisica |
| Depositing User: | Marina Spanti |
| Date Deposited: | 10 Jul 2025 14:24 |
| Last Modified: | 10 Jul 2025 14:24 |
| URI: | http://eprints.bice.rm.cnr.it/id/eprint/23638 |
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