@Article{ATLASCollaborationAad_etal2010, author="ATLAS Collaboration (Aad, G. et al and Amoros, G. and Cabrera Urban, S. and Campabadal Segura, F. and Castillo Gimenez, V. and Costa, M. J. and Escobar, C. and Fassi, F. and Ferrer, A. and Fuster, J. and Garcia, C. and Gonzalez de la Hoz, S. and Hernandez Jimenez, Y. and Higon-Rodriguez, E. and Irles Quiles, A. and Kaci, M. and Lacasta, C. and Lacuesta, V. R. and Marti-Garcia, S. and Mi{\~{n}}ano, M. and Mitsou, V. A. and Moles-Valls, R. and Moreno Llacer, M. and Oliver Garcia, E. and Perez Garcia-Esta{\~{n}}, M. T. and Ros, E. and Salt, J. and Sanchis-Lozano, M. A. and Solans, C. A. and Sospedra Suay, L. and Sanchez, J. and Torro Pastor, E. and Valladolid Gallego, E. and Valls Ferrer, J. A. and Villaplana Perez, M. and Vos, M. and Wildauer, A.", title="Drift Time Measurement in the ATLAS Liquid Argon Electromagnetic Calorimeter using Cosmic Muons", journal="European Physical Journal C", year="2010", publisher="Springer", volume="70", number="3", pages="755--785", 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/mu s at 88.5 K and 1 kV/mm.", optnote="ISI:000285200000012", optnote="exported from refbase (https://references.ific.uv.es/refbase/show.php?record=305), last updated on Mon, 19 Aug 2019 07:19:22 +0000", issn="1434-6044", doi="10.1140/epjc/s10052-010-1403-6", opturl="http://arxiv.org/abs/1002.4189", opturl="https://doi.org/10.1140/epjc/s10052-010-1403-6", archivePrefix="arXiv", eprint="1002.4189", language="English" }