Drift Time Measurement in the ATLAS Liquid Argon Electromagnetic Calorimeter using Cosmic Muons

The ATLAS collaboration

doi:10.1140/epjc/s10052-010-1403-6

Drift Time Measurement in the ATLAS Liquid Argon Electromagnetic Calorimeter using Cosmic Muons

The ATLAS collaboration

University at Albany, Stony Brook University

University of Freiburg
University of Oklahoma
Autonomous University of Barcelona
University of Geneva
University of Oxford
Azerbaijan National Academy of Sciences
Oklahoma State University
Michigan State University
Tel Aviv University
Laboratoire de l'Accélérateur Linéaire
National Institute for Nuclear Physics
Abdus Salam International Centre for Theoretical Physics
United States Department of Energy
Hampton University
Yale University
University of Calabria
Queen Mary University of London
STFC Rutherford Appleton Laboratory (RAL)
Brandeis University
University of Granada
Johannes Gutenberg University Mainz
Boston University
Stony Brook University
University of Alberta
University of Texas at Dallas
University of Rome Tor Vergata
Bogazici University
Lund University
The University of Tokyo
P.N. Lebedev Physical Institute of the Russian Academy of Sciences
SUNY Albany
Royal Holloway University of London
University of Victoria BC
IN2P3 - Institut National de Physique Nucléaire et de Physique Des Particules
CERN
Joint Institute for Nuclear Research
Horia Hulubei National Institute of Physics and Nuclear Engineering
National Technical University of Athens
University of Bonn
Humboldt University of Berlin
University of Pennsylvania
University of Liverpool
University of Freiburg
University of Oklahoma
University of Oxford
Azerbaijan National Academy of Sciences
Oklahoma State University
Michigan State University
Tel Aviv University
IN2P3/CNRS
National Institute for Nuclear Physics
Abdus Salam International Centre for Theoretical Physics
United States Department of Energy
Yale University
Queen Mary University of London
Brandeis University
Johannes Gutenberg University Mainz
Boston University
Stony Brook University
University of Alberta
University of Rome Tor Vergata
Lund University
P.N. Lebedev Physical Institute of the Russian Academy of Sciences
SUNY Albany
Royal Holloway University of London
University of Victoria BC
IN2P3-CNRS
CERN
Joint Institute for Nuclear Research
Horia Hulubei National Institute of Physics and Nuclear Engineering
National Technical University of Athens
University of Bonn

Research output: Contribution to journal › Article › peer-review

14 Scopus citations

Abstract

The ionization signals in the liquid argon of the ATLAS electromagnetic calorimeter are studied in detail using cosmic muons. In particular, the drift time of the ionization electrons is measured and used to assess the intrinsic uniformity of the calorimeter gaps and estimate its impact on the constant term of the energy resolution. The drift times of electrons in the cells of the second layer of the calorimeter are uniform at the level of 1.3% in the barrel and 2.8% in the endcaps. This leads to an estimated contribution to the constant term of (0.29_0.04 ^0.05)% in the barrel and (0.54_0.04 ^0.06)% in the endcaps. The same data are used to measure the drift velocity of ionization electrons in liquid argon, which is found to be 4.61±0.07 mm/μs at 88.5 K and 1 kV/mm.

Original language	English
Pages (from-to)	755-785
Number of pages	31
Journal	European Physical Journal C
Volume	70
Issue number	3
DOIs	https://doi.org/10.1140/epjc/s10052-010-1403-6
State	Published - Dec 2010

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10.1140/epjc/s10052-010-1403-6

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@article{76f5a8aeb7af432b86bd0ab8d6a47f84,

title = "Drift Time Measurement in the ATLAS Liquid Argon Electromagnetic Calorimeter using Cosmic Muons",

abstract = "The ionization signals in the liquid argon of the ATLAS electromagnetic calorimeter are studied in detail using cosmic muons. In particular, the drift time of the ionization electrons is measured and used to assess the intrinsic uniformity of the calorimeter gaps and estimate its impact on the constant term of the energy resolution. The drift times of electrons in the cells of the second layer of the calorimeter are uniform at the level of 1.3\% in the barrel and 2.8\% in the endcaps. This leads to an estimated contribution to the constant term of (0.290.04 0.05)\% in the barrel and (0.540.04 0.06)\% in the endcaps. The same data are used to measure the drift velocity of ionization electrons in liquid argon, which is found to be 4.61±0.07 mm/μs at 88.5 K and 1 kV/mm.",

author = "\{The ATLAS collaboration\} and G. Aad and B. Abbott and J. Abdallah and Abdelalim, \{A. A.\} and A. Abdesselam and O. Abdinov and B. Abi and M. Abolins and H. Abramowicz and H. Abreu and Acharya, \{B. S.\} and Adams, \{D. L.\} and Addy, \{T. N.\} and J. Adelman and C. Adorisio and P. Adragna and T. Adye and S. Aefsky and Aguilar-Saavedra, \{J. A.\} and M. Aharrouche and Ahlen, \{S. P.\} and F. Ahles and A. Ahmad and H. Ahmed and M. Ahsan and G. Aielli and T. Akdogan and {\AA}kesson, \{T. P.A.\} and G. Akimoto and Akimov, \{A. V.\} and A. Aktas and Alam, \{M. S.\} and Alam, \{M. A.\} and J. Albert and S. Albrand and M. Aleksa and Aleksandrov, \{I. N.\} and F. Alessandria and C. Alexa and G. Alexander and G. Alexandre and T. Alexopoulos and M. Alhroob and M. Aliev and G. Alimonti and J. Alison and M. Aliyev and Allport, \{P. P.\} and J. Ernst and V. Jain and \{Da Via\}, C. and V. Dao and J. Hobbs and J. Jia and G. Piacquadio and D. Tsybychev",

year = "2010",

month = dec,

doi = "10.1140/epjc/s10052-010-1403-6",

language = "English",

volume = "70",

pages = "755--785",

journal = "European Physical Journal C",

issn = "1434-6044",

number = "3",

}

TY - JOUR

T1 - Drift Time Measurement in the ATLAS Liquid Argon Electromagnetic Calorimeter using Cosmic Muons

AU - The ATLAS collaboration

AU - Aad, G.

AU - Abbott, B.

AU - Abdallah, J.

AU - Abdelalim, A. A.

AU - Abdesselam, A.

AU - Abdinov, O.

AU - Abi, B.

AU - Abolins, M.

AU - Abramowicz, H.

AU - Abreu, H.

AU - Acharya, B. S.

AU - Adams, D. L.

AU - Addy, T. N.

AU - Adelman, J.

AU - Adorisio, C.

AU - Adragna, P.

AU - Adye, T.

AU - Aefsky, S.

AU - Aguilar-Saavedra, J. A.

AU - Aharrouche, M.

AU - Ahlen, S. P.

AU - Ahles, F.

AU - Ahmad, A.

AU - Ahmed, H.

AU - Ahsan, M.

AU - Aielli, G.

AU - Akdogan, T.

AU - Åkesson, T. P.A.

AU - Akimoto, G.

AU - Akimov, A. V.

AU - Aktas, A.

AU - Alam, M. S.

AU - Alam, M. A.

AU - Albert, J.

AU - Albrand, S.

AU - Aleksa, M.

AU - Aleksandrov, I. N.

AU - Alessandria, F.

AU - Alexa, C.

AU - Alexander, G.

AU - Alexandre, G.

AU - Alexopoulos, T.

AU - Alhroob, M.

AU - Aliev, M.

AU - Alimonti, G.

AU - Alison, J.

AU - Aliyev, M.

AU - Allport, P. P.

AU - Ernst, J.

AU - Jain, V.

AU - Da Via, C.

AU - Dao, V.

AU - Hobbs, J.

AU - Jia, J.

AU - Piacquadio, G.

AU - Tsybychev, D.

PY - 2010/12

Y1 - 2010/12

N2 - The ionization signals in the liquid argon of the ATLAS electromagnetic calorimeter are studied in detail using cosmic muons. In particular, the drift time of the ionization electrons is measured and used to assess the intrinsic uniformity of the calorimeter gaps and estimate its impact on the constant term of the energy resolution. The drift times of electrons in the cells of the second layer of the calorimeter are uniform at the level of 1.3% in the barrel and 2.8% in the endcaps. This leads to an estimated contribution to the constant term of (0.290.04 0.05)% in the barrel and (0.540.04 0.06)% in the endcaps. The same data are used to measure the drift velocity of ionization electrons in liquid argon, which is found to be 4.61±0.07 mm/μs at 88.5 K and 1 kV/mm.

AB - The ionization signals in the liquid argon of the ATLAS electromagnetic calorimeter are studied in detail using cosmic muons. In particular, the drift time of the ionization electrons is measured and used to assess the intrinsic uniformity of the calorimeter gaps and estimate its impact on the constant term of the energy resolution. The drift times of electrons in the cells of the second layer of the calorimeter are uniform at the level of 1.3% in the barrel and 2.8% in the endcaps. This leads to an estimated contribution to the constant term of (0.290.04 0.05)% in the barrel and (0.540.04 0.06)% in the endcaps. The same data are used to measure the drift velocity of ionization electrons in liquid argon, which is found to be 4.61±0.07 mm/μs at 88.5 K and 1 kV/mm.

UR - https://www.scopus.com/pages/publications/79651474032

U2 - 10.1140/epjc/s10052-010-1403-6

DO - 10.1140/epjc/s10052-010-1403-6

M3 - Article

SN - 1434-6044

VL - 70

SP - 755

EP - 785

JO - European Physical Journal C

JF - European Physical Journal C

IS - 3

ER -

Drift Time Measurement in the ATLAS Liquid Argon Electromagnetic Calorimeter using Cosmic Muons

Abstract

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