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

  • The ATLAS collaboration
  • Aix-Marseille Université
  • University of Oklahoma
  • University of Massachusetts
  • Azerbaijan National Academy of Sciences
  • University of Pavia
  • University of Göttingen
  • Royal Holloway University of London
  • University of Toronto
  • University of Copenhagen
  • University of Sussex
  • Tel Aviv University
  • Technion-Israel Institute of Technology
  • Argonne National Laboratory
  • National Institute for Nuclear Physics
  • Abdus Salam International Centre for Theoretical Physics
  • King's College London
  • The University of Tokyo
  • Johannes Gutenberg University Mainz
  • IN2P3/CNRS
  • AGH University of Krakow
  • Northern Illinois University
  • Ludwig Maximilian University of Munich
  • Bogazici University
  • Istanbul University
  • University of Geneva
  • Rutherford Appleton Laboratory
  • University of California at Santa Cruz
  • Université Clermont Auvergne
  • Radboud University Nijmegen
  • Alexandru Ioan Cuza University of Iaşi
  • University of Lisbon
  • University of Granada
  • IFT-UAM/CSIC
  • Joint Institute for Nuclear Research
  • McGill University
  • University of California at Berkeley
  • University of Rome Tor Vergata
  • Kyoto University
  • Lund University
  • P.N. Lebedev Physical Institute of the Russian Academy of Sciences
  • University of Bologna
  • University of Victoria BC

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

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 μm.

Original languageEnglish
Article numberP09011
JournalJournal of Instrumentation
Volume14
Issue number9
DOIs
StatePublished - Sep 16 2019

Keywords

  • Gaseous detectors
  • Muon spectrometers
  • Particle tracking detectors (gaseous detectors)
  • Wire chambers (MWPC, thin-gap chambers, drift chambers, drift tubes, proportional chambers etc)

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