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

ATLAS

doi:10.1088/1748-0221/14/09/P09011

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

ATLAS

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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.

Originalsprog	Engelsk
Artikelnummer	P09011
Tidsskrift	Journal of Instrumentation
Vol/bind	14
Antal sider	36
ISSN	1748-0221
DOI	https://doi.org/10.1088/1748-0221/14/09/P09011
Status	Udgivet - 16 sep. 2019

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10.1088/1748-0221/14/09/P09011Licens: CC BY

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title = "Resolution of the ATLAS muon spectrometer monitored drift tubes in LHC Run 2",

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.",

author = "G. Aad and B. Abbott and DC Abbott and O. Abdinov and AA Abud and K. Abeling and DK Abhayasinghe and S.H. Abidi and AbouZeid, {Ossama Sherif Alexander} and NL Abraham and H. Abramowicz and H. Abreu and Y. Abulaiti and B.S. Acharya and {de Almeida Dias}, Flavia and hqz214 hqz214 and {Alonso Diaz}, Alejandro and Geert-Jan Besjes and Milena Bajic and Alessandra Camplani and Mogens Dam and Galster, {Gorm Aske Gram Krohn} and Hansen, {Peter Henrik} and Hansen, {J{\o}rn Dines} and Hansen, {J{\o}rgen Beck} and Rosanna Ignazzi and Petersen, {Troels Christian} and Monk, {James William} and Stefania Xella and Stark, {Simon Holm} and Graig Wiglesworth and ATLAS",

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AU - Aad, G.

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AU - Abbott, DC

AU - Abdinov, O.

AU - Abud, AA

AU - Abeling, K.

AU - Abhayasinghe, DK

AU - Abidi, S.H.

AU - AbouZeid, Ossama Sherif Alexander

AU - Abraham, NL

AU - Abramowicz, H.

AU - Abreu, H.

AU - Abulaiti, Y.

AU - Acharya, B.S.

AU - de Almeida Dias, Flavia

AU - hqz214, hqz214

AU - Alonso Diaz, Alejandro

AU - Besjes, Geert-Jan

AU - Bajic, Milena

AU - Camplani, Alessandra

AU - Dam, Mogens

AU - Galster, Gorm Aske Gram Krohn

AU - Hansen, Peter Henrik

AU - Hansen, Jørn Dines

AU - Hansen, Jørgen Beck

AU - Ignazzi, Rosanna

AU - Petersen, Troels Christian

AU - Monk, James William

AU - Xella, Stefania

AU - Stark, Simon Holm

AU - Wiglesworth, Graig

AU - ATLAS

PY - 2019/9/16

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N2 - 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.

AB - 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.

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

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