The ATLAS experiment at the CERN Large Hadron Collider: a description of the detector configuration for Run 3

The ATLAS collaboration

doi:10.1088/1748-0221/19/05/P05063

The ATLAS experiment at the CERN Large Hadron Collider: a description of the detector configuration for Run 3

The ATLAS collaboration

Assistant Professorship of Data Science in Physics

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University of Chinese Academy of Sciences
University of Science and Technology of China
Beijing University
University of Liverpool
McGill University
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Stockholm University
Oskar Klein Centre
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PT Government Associated Laboratory, University of Minho
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Universidade de Lisboa
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University of Granada
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Charles University in Prague
University of Warwick
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Pontificia Universidad Católica de Chile
Millennium Institute for Subatomic physics at high energy frontier (SAPHIR)
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Technion - Israel Institute of Technology
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Center for Interdisciplinary Research and Innovation (CIRI-AUTH)
Hellenic Open University
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Weizmann Institute of Science Israel
Ben Gurion University of the Negev
University of Louisville
Bergische Universität Wuppertal
Yale University
A.I. Alikhanyan National Science Laboratory (YerPhi)

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Abstract

The ATLAS detector is installed in its experimental cavern at Point 1 of the CERN Large Hadron Collider. During Run 2 of the LHC, a luminosity of ℒ = 2 × 10³⁴ cm^-2 s^-1 was routinely achieved at the start of fills, twice the design luminosity. For Run 3, accelerator improvements, notably luminosity levelling, allow sustained running at an instantaneous luminosity of ℒ = 2 × 10³⁴ cm^-2 s^-1, with an average of up to 60 interactions per bunch crossing. The ATLAS detector has been upgraded to recover Run 1 single-lepton trigger thresholds while operating comfortably under Run 3 sustained pileup conditions. A fourth pixel layer 3.3 cm from the beam axis was added before Run 2 to improve vertex reconstruction and b-tagging performance. New Liquid Argon Calorimeter digital trigger electronics, with corresponding upgrades to the Trigger and Data Acquisition system, take advantage of a factor of 10 finer granularity to improve triggering on electrons, photons, taus, and hadronic signatures through increased pileup rejection. The inner muon endcap wheels were replaced by New Small Wheels with Micromegas and small-strip Thin Gap Chamber detectors, providing both precision tracking and Level-1 Muon trigger functionality. Trigger coverage of the inner barrel muon layer near one endcap region was augmented with modules integrating new thin-gap resistive plate chambers and smaller-diameter drift-tube chambers. Tile Calorimeter scintillation counters were added to improve electron energy resolution and background rejection. Upgrades to Minimum Bias Trigger Scintillators and Forward Detectors improve luminosity monitoring and enable total proton-proton cross section, diffractive physics, and heavy ion measurements. These upgrades are all compatible with operation in the much harsher environment anticipated after the High-Luminosity upgrade of the LHC and are the first steps towards preparing ATLAS for the High-Luminosity upgrade of the LHC. This paper describes the Run 3 configuration of the ATLAS detector.

Original language	English
Article number	P05063
Journal	Journal of Instrumentation
Volume	19
Issue number	5
DOIs	https://doi.org/10.1088/1748-0221/19/05/P05063
State	Published - 1 May 2024

Keywords

Calorimeter methods
Large detector systems for particle and astroparticle physics
Muon spectrometers
Particle tracking detectors

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10.1088/1748-0221/19/05/P05063

Cite this

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title = "The ATLAS experiment at the CERN Large Hadron Collider: a description of the detector configuration for Run 3",

abstract = "The ATLAS detector is installed in its experimental cavern at Point 1 of the CERN Large Hadron Collider. During Run 2 of the LHC, a luminosity of ℒ = 2 × 1034 cm-2 s-1 was routinely achieved at the start of fills, twice the design luminosity. For Run 3, accelerator improvements, notably luminosity levelling, allow sustained running at an instantaneous luminosity of ℒ = 2 × 1034 cm-2 s-1, with an average of up to 60 interactions per bunch crossing. The ATLAS detector has been upgraded to recover Run 1 single-lepton trigger thresholds while operating comfortably under Run 3 sustained pileup conditions. A fourth pixel layer 3.3 cm from the beam axis was added before Run 2 to improve vertex reconstruction and b-tagging performance. New Liquid Argon Calorimeter digital trigger electronics, with corresponding upgrades to the Trigger and Data Acquisition system, take advantage of a factor of 10 finer granularity to improve triggering on electrons, photons, taus, and hadronic signatures through increased pileup rejection. The inner muon endcap wheels were replaced by New Small Wheels with Micromegas and small-strip Thin Gap Chamber detectors, providing both precision tracking and Level-1 Muon trigger functionality. Trigger coverage of the inner barrel muon layer near one endcap region was augmented with modules integrating new thin-gap resistive plate chambers and smaller-diameter drift-tube chambers. Tile Calorimeter scintillation counters were added to improve electron energy resolution and background rejection. Upgrades to Minimum Bias Trigger Scintillators and Forward Detectors improve luminosity monitoring and enable total proton-proton cross section, diffractive physics, and heavy ion measurements. These upgrades are all compatible with operation in the much harsher environment anticipated after the High-Luminosity upgrade of the LHC and are the first steps towards preparing ATLAS for the High-Luminosity upgrade of the LHC. This paper describes the Run 3 configuration of the ATLAS detector.",

keywords = "Calorimeter methods, Large detector systems for particle and astroparticle physics, Muon spectrometers, Particle tracking detectors",

author = "\{The ATLAS collaboration\} and M. Amerl and Filmer, \{E. K.\} and P. Jackson and Kong, \{A. X.Y.\} and H. Potti and Ruggeri, \{T. A.\} and Ting, \{E. X.L.\} and White, \{M. J.\} and Davis, \{P. M.\} and Gingrich, \{D. M.\} and Lindon, \{J. H.\} and N. Nishu and Pinfold, \{J. L.\} and R. Soluk and O. Cakir and \{Duran Yildiz\}, H. and S. Kuday and \{Turk Cakir\}, I. and S. Sultansoy and \{Adam Bourdarios\}, C. and J. Ballansat and F. Bellachia and N. Berger and T. Bouedo and S. Cap and N. Chevillot and F. Costanza and P. David and P. Delebecque and M. Delmastro and \{Di Ciaccio\}, L. and \{Dumont Dayot\}, N. and S. Elles and Fragnaud, \{J. C.\} and Gantel, \{L. M.\} and C. Goy and T. Guillemin and T. Hryn'ova and S. J{\'e}z{\'e}quel and I. Koletsou and S. Lafrasse and J. Lev{\^e}que and Lewis, \{D. J.\} and Little, \{J. D.\} and \{Lorenzo Martinez\}, N. and N. Massol and G. Perrot and G. Poddar and E. Kourlitis and L. Heinrich",

note = "Publisher Copyright: {\textcopyright} 2024 CERN for the benefit of the ATLAS collaboration.",

year = "2024",

month = may,

day = "1",

doi = "10.1088/1748-0221/19/05/P05063",

language = "English",

volume = "19",

journal = "Journal of Instrumentation",

issn = "1748-0221",

publisher = "Institute of Physics",

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TY - JOUR

T1 - The ATLAS experiment at the CERN Large Hadron Collider

T2 - a description of the detector configuration for Run 3

AU - The ATLAS collaboration

AU - Amerl, M.

AU - Filmer, E. K.

AU - Jackson, P.

AU - Kong, A. X.Y.

AU - Potti, H.

AU - Ruggeri, T. A.

AU - Ting, E. X.L.

AU - White, M. J.

AU - Davis, P. M.

AU - Gingrich, D. M.

AU - Lindon, J. H.

AU - Nishu, N.

AU - Pinfold, J. L.

AU - Soluk, R.

AU - Cakir, O.

AU - Duran Yildiz, H.

AU - Kuday, S.

AU - Turk Cakir, I.

AU - Sultansoy, S.

AU - Adam Bourdarios, C.

AU - Ballansat, J.

AU - Bellachia, F.

AU - Berger, N.

AU - Bouedo, T.

AU - Cap, S.

AU - Chevillot, N.

AU - Costanza, F.

AU - David, P.

AU - Delebecque, P.

AU - Delmastro, M.

AU - Di Ciaccio, L.

AU - Dumont Dayot, N.

AU - Elles, S.

AU - Fragnaud, J. C.

AU - Gantel, L. M.

AU - Goy, C.

AU - Guillemin, T.

AU - Hryn'ova, T.

AU - Jézéquel, S.

AU - Koletsou, I.

AU - Lafrasse, S.

AU - Levêque, J.

AU - Lewis, D. J.

AU - Little, J. D.

AU - Lorenzo Martinez, N.

AU - Massol, N.

AU - Perrot, G.

AU - Poddar, G.

AU - Kourlitis, E.

AU - Heinrich, L.

PY - 2024/5/1

Y1 - 2024/5/1

N2 - The ATLAS detector is installed in its experimental cavern at Point 1 of the CERN Large Hadron Collider. During Run 2 of the LHC, a luminosity of ℒ = 2 × 1034 cm-2 s-1 was routinely achieved at the start of fills, twice the design luminosity. For Run 3, accelerator improvements, notably luminosity levelling, allow sustained running at an instantaneous luminosity of ℒ = 2 × 1034 cm-2 s-1, with an average of up to 60 interactions per bunch crossing. The ATLAS detector has been upgraded to recover Run 1 single-lepton trigger thresholds while operating comfortably under Run 3 sustained pileup conditions. A fourth pixel layer 3.3 cm from the beam axis was added before Run 2 to improve vertex reconstruction and b-tagging performance. New Liquid Argon Calorimeter digital trigger electronics, with corresponding upgrades to the Trigger and Data Acquisition system, take advantage of a factor of 10 finer granularity to improve triggering on electrons, photons, taus, and hadronic signatures through increased pileup rejection. The inner muon endcap wheels were replaced by New Small Wheels with Micromegas and small-strip Thin Gap Chamber detectors, providing both precision tracking and Level-1 Muon trigger functionality. Trigger coverage of the inner barrel muon layer near one endcap region was augmented with modules integrating new thin-gap resistive plate chambers and smaller-diameter drift-tube chambers. Tile Calorimeter scintillation counters were added to improve electron energy resolution and background rejection. Upgrades to Minimum Bias Trigger Scintillators and Forward Detectors improve luminosity monitoring and enable total proton-proton cross section, diffractive physics, and heavy ion measurements. These upgrades are all compatible with operation in the much harsher environment anticipated after the High-Luminosity upgrade of the LHC and are the first steps towards preparing ATLAS for the High-Luminosity upgrade of the LHC. This paper describes the Run 3 configuration of the ATLAS detector.

AB - The ATLAS detector is installed in its experimental cavern at Point 1 of the CERN Large Hadron Collider. During Run 2 of the LHC, a luminosity of ℒ = 2 × 1034 cm-2 s-1 was routinely achieved at the start of fills, twice the design luminosity. For Run 3, accelerator improvements, notably luminosity levelling, allow sustained running at an instantaneous luminosity of ℒ = 2 × 1034 cm-2 s-1, with an average of up to 60 interactions per bunch crossing. The ATLAS detector has been upgraded to recover Run 1 single-lepton trigger thresholds while operating comfortably under Run 3 sustained pileup conditions. A fourth pixel layer 3.3 cm from the beam axis was added before Run 2 to improve vertex reconstruction and b-tagging performance. New Liquid Argon Calorimeter digital trigger electronics, with corresponding upgrades to the Trigger and Data Acquisition system, take advantage of a factor of 10 finer granularity to improve triggering on electrons, photons, taus, and hadronic signatures through increased pileup rejection. The inner muon endcap wheels were replaced by New Small Wheels with Micromegas and small-strip Thin Gap Chamber detectors, providing both precision tracking and Level-1 Muon trigger functionality. Trigger coverage of the inner barrel muon layer near one endcap region was augmented with modules integrating new thin-gap resistive plate chambers and smaller-diameter drift-tube chambers. Tile Calorimeter scintillation counters were added to improve electron energy resolution and background rejection. Upgrades to Minimum Bias Trigger Scintillators and Forward Detectors improve luminosity monitoring and enable total proton-proton cross section, diffractive physics, and heavy ion measurements. These upgrades are all compatible with operation in the much harsher environment anticipated after the High-Luminosity upgrade of the LHC and are the first steps towards preparing ATLAS for the High-Luminosity upgrade of the LHC. This paper describes the Run 3 configuration of the ATLAS detector.

KW - Calorimeter methods

KW - Large detector systems for particle and astroparticle physics

KW - Muon spectrometers

KW - Particle tracking detectors

UR - https://www.scopus.com/pages/publications/85196183700

U2 - 10.1088/1748-0221/19/05/P05063

DO - 10.1088/1748-0221/19/05/P05063

M3 - Article

AN - SCOPUS:85196183700

SN - 1748-0221

VL - 19

JO - Journal of Instrumentation

JF - Journal of Instrumentation

IS - 5

M1 - P05063

ER -

The ATLAS experiment at the CERN Large Hadron Collider: a description of the detector configuration for Run 3

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Keywords

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