The, ATLAS Collaboration, Aad, G., Abbott, B. et al. (86 more authors) (2010) Drift Time Measurement in the ATLAS Liquid Argon Electromagnetic Calorimeter using Cosmic Muons. European Physical Journal C: Particles and Fields, 70 (3). pp. 755-785. ISSN 1434-6044
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 (0.290.040.05)% in the barrel and (0.540.040.06)% 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.
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Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © CERN for the benefit of the ATLAS collaboration 2010. This article is distributed under the terms of the Creative Commons Attribution Noncommercial License which permits any noncommercial use, distribution, and reproduction in any medium, provided the original author(s) and source are credited. |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Materials Science and Engineering (Sheffield) The University of Sheffield > Faculty of Science (Sheffield) > Department of Physics and Astronomy (Sheffield) |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 02 Dec 2016 12:03 |
Last Modified: | 02 Dec 2016 12:08 |
Published Version: | https://doi.org/10.1140/epjc/s10052-010-1403-6 |
Status: | Published |
Publisher: | Springer Verlag (Germany) |
Refereed: | Yes |
Identification Number: | 10.1140/epjc/s10052-010-1403-6 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:107658 |
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