Drift time measurement in the ATLAS liquid argon electromagnetic calorimeter using cosmic muons
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 const...
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| Hauptverfasser: | , , , , , , , , , , , , , , , |
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| Körperschaft: | |
| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
23 October 2010
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| In: |
The European physical journal. C, Particles and fields
Year: 2010, Jahrgang: 70, Pages: 755-785 |
| ISSN: | 1434-6052 |
| DOI: | 10.1140/epjc/s10052-010-1403-6 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1140/epjc/s10052-010-1403-6
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| Verfasserangaben: | The ATLAS Collaboration* |
MARC
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| 245 | 1 | 0 | |a Drift time measurement in the ATLAS liquid argon electromagnetic calorimeter using cosmic muons |c The ATLAS Collaboration* |
| 264 | 1 | |c 23 October 2010 | |
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| 500 | |a Gesehen am 31.10.2022 | ||
| 520 | |a 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 $(0.29^{+0.05}_{-0.04})$% in the barrel and $(0.54^{+0.06}_{-0.04})$% 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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| 650 | 4 | |a Drift Time | |
| 650 | 4 | |a Drift Velocity | |
| 650 | 4 | |a Liquid Argon | |
| 650 | 4 | |a Systematic Uncertainty | |
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