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

The ATLAS collaboration, et al. (2019) Resolution of the ATLAS muon spectrometer monitored drift tubes in LHC Run 2. Journal of Instrumentation, 14(09), P09011. (doi: 10.1088/1748-0221/14/09/P09011)

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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.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Buckley, Professor Andy and Connelly, Dr Ian and Thompson, Dr Alan and Robson, Professor Aidan and Warrack, Neil and O'Shea, Professor Val and Crawley, Samuel Joseph and Owen, Professor Mark and Spiteri, Dr Dwayne and Jamieson, Dr Jonathan and Blue, Dr Andrew and DUNCAN, ANNA and Boutle, Dr Sarah and Bussey, Dr Peter and Fabbri, Dr Federica and Alshehri, Azzah Aziz B and Buttar, Professor Craig and Stewart, Dr Graeme and Wraight, Dr Kenneth and Britton, Professor David and Doyle, Professor Anthony and Zaripovas, Donatas and Breaden Madden, William and Gul, Dr Umar and Gray, Chloe and FENTON, MICHAEL and Bates, Dr Richard and Callea, Dr Giuseppe
Authors: The ATLAS collaboration, , Alshehri, A.A., Bates, R.L., Blue, A., Boutle, S.K., Breaden Madden, W.D., Britton, D., Buckley, A.G., Bussey, P.J., Buttar, C.M., Callea, G., Connelly, I.A., Crawley, S.J., Doyle, A.T., Duncan, A.K., Fabbri, F., Fenton, M.J., Gray, C., Gul, U., Jamieson, J., O'Shea, V., Owen, M., Robson, A., Spiteri, D.P., Stewart, G.A., Thompson, A.S., Warrack, N., Wraight, K., and Zaripovas, D.R.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Journal of Instrumentation
Publisher:IOP Publishing
ISSN (Online):1748-0221
Published Online:16 September 2019
Copyright Holders:Copyright © 2019 CERN for the benefit of the ATLAS collaboration
First Published:First published in Journal of Instrumentation 14(09): P09011
Publisher Policy:Reproduced under a Creative Commons License

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