Oxana Smirnova
Senior Lecturer, Deputy Head of division
Resolution of the ATLAS muon spectrometer monitored drift tubes in LHC Run 2
Author
Summary, in English
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. © 2019 CERN for the benefit of the ATLAS collaboration. Published by IOP Publishing Ltd on behalf of Sissa Medialab. Original content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
Department/s
- Particle and nuclear physics
- eSSENCE: The e-Science Collaboration
Publishing year
2019
Language
English
Publication/Series
Journal of Instrumentation
Volume
14
Issue
9
Document type
Journal article
Publisher
IOP Publishing
Topic
- Accelerator Physics and Instrumentation
- Subatomic Physics
Keywords
- Gaseous detectors
- Muon spectrometers
- Particle tracking detectors (gaseous detectors)
- Wire chambers (MWPC, thin-gap chambers, drift chambers, drift tubes, proportional chambers etc)
- Charged particles
- Gas detectors
- Image resolution
- Ionization chambers
- Particle spectrometers
- Tubes (components)
- ATLAS Muon spectrometer
- Baseline calibration
- High pressure drift tubes
- Momentum measurement
- Monitored drift tubes
- Muon spectrometer
- Thin Gap Chamber
- Drift chambers
Status
Published
ISBN/ISSN/Other
- ISSN: 1748-0221