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Resolution of the ATLAS muon spectrometer monitored drift tubes in LHC Run 2
Aix Marseille Univ, CPPM, CNRS, IN2P3, Marseille, France..
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.ORCID iD: 0000-0003-3867-0336
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.ORCID iD: 0000-0002-8015-7512
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.ORCID iD: 0000-0002-5935-7464
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Number of Authors: 29252019 (English)In: Journal of Instrumentation, ISSN 1748-0221, E-ISSN 1748-0221, Vol. 14, article id P09011Article in journal (Refereed) Published
Abstract [en]

The 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 mu m.

Place, publisher, year, edition, pages
IOP PUBLISHING LTD , 2019. Vol. 14, article id P09011
Keywords [en]
Gaseous detectors, Muon spectrometers, Particle tracking detectors (Gaseous detectors), Wire chambers (MWPC, Thin-gap chambers, drift chambers, drift tubes, proportional chambers etc)
National Category
Subatomic Physics
Identifiers
URN: urn:nbn:se:kth:diva-261763DOI: 10.1088/1748-0221/14/09/P09011ISI: 000486990000011Scopus ID: 2-s2.0-85075046132OAI: oai:DiVA.org:kth-261763DiVA, id: diva2:1359845
Note

QC 20191010

Available from: 2019-10-10 Created: 2019-10-10 Last updated: 2020-03-09Bibliographically approved

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Jensen, BengtOhm, ChristianRipellino, GiuliaSidebo, P. EdvinStrandberg, Jonas

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