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Title

Resolution of the ATLAS muon spectrometer monitored drift tubes in LHC Run 2

AuthorsATLAS Collaboration; Álvarez Piqueras, D. ; Aparisi, Pozo, J.A.; Bailey, A.J.; Barranco, Laura; Cabrera, Susana ; Castillo, F.L.; Castillo Mª Victoria.; Cerda Alberich, L.; Costa, María José ; Escobar, Carlos ; Estrada, Oscar; Ferrer, Antonio ; Fiorini, L. ; Fullana, Esteban ; Fuster, Juan ; García García, Carmen ; García Navarro, José Enrique ; González de la Hoz, Santiago ; Guerrero Rojas, J.G.R.; Gonzalvo Rodríguez, Galo Rafael; Higón, Emilio ; Jimenez Pena, Javier; Lacasta Llácer, Carlos ; Lozano Bahilo, José J.; Madaffari, Daniele; Mamuzic, Judita; Martí García, Salvador ; Melini, Davide; Miñano Moya, M.; Mitsou, Vasiliki A. ; Rodriguez Bosca, S.; Rodriguez Rodriguez, D.; Ruiz Martínez, Arantxa ; Salt, José ; Santra, A.; Sánchez Martínez, Javier ; Soldevila, Urmila ; Valero, Alberto ; Valls Ferrer, Juan Antonio ; Vos, Marcel
KeywordsGaseous detectors
Muon spectrometers
Particle tracking detectors (Gaseous detectors)
Wire chambers (MWPC, Thin-gap chambers, drift chambers, drift tubes, proportional chambers etc)
Issue DateSep-2019
PublisherIOP Publishing
CitationJournal of Instrumentation 14: P09011 (2019)
AbstractThe momentum measurement capability of the ATLAS muon spectrometer relies fundamentally on the intrinsic single-hit spatial resolution of the monitored drift tube precision tracking chambers. Optimal resolution is achieved with a dedicated calibration program that addresses the specific operating conditions of the 354 000 high-pressure drift tubes in the spectrometer. The calibrations consist of a set of timing offsets and drift time to drift distance transfer relations, and result in chamber resolution functions. This paper describes novel algorithms to obtain precision calibrations from data collected by ATLAS in LHC Run 2 and from a gas monitoring chamber, deployed in a dedicated gas facility. The algorithm output consists of a pair of correction constants per chamber which are applied to baseline calibrations, and determined to be valid for the entire ATLAS Run 2. The final single-hit spatial resolution, averaged over 1172 monitored drift tube chambers, is 81.7 ± 2.2 μm.
Publisher version (URL)http://dx.doi.org/10.1088/1748-0221/14/09/P09011
URIhttp://hdl.handle.net/10261/208891
Identifiersdoi: 10.1088/1748-0221/14/09/P09011
issn: 1748-0221
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