TY - JOUR AU - ATLAS Collaboration (Aad, G. et al AU - Amoros, G. AU - Cabrera Urban, S. AU - Castillo Gimenez, V. AU - Costa, M. J. AU - Escobar, C. AU - Fassi, F. AU - Ferrer, A. AU - Fuster, J. AU - Garcia, C. AU - Gonzalez de la Hoz, S. AU - Higon-Rodriguez, E. AU - Irles Quiles, A. AU - Kaci, M. AU - Lacasta, C. AU - Lacuesta, V. R. AU - Marti-Garcia, S. AU - Miñano, M. AU - Mitsou, V. A. AU - Moles-Valls, R. AU - Moreno Llacer, M. AU - Oliver Garcia, E. AU - Perez Garcia-Estañ, M. T. AU - Ros, E. AU - Ruiz-Martinez, A. AU - Salt, J. AU - Sanchis-Lozano, M. A. AU - Solans, C. A. AU - Sospedra Suay, L. AU - Sanchez, J. AU - Torro Pastor, E. AU - Valladolid Gallego, E. AU - Valls Ferrer, J. A. AU - Villaplana Perez, M. AU - Vos, M. AU - Wildauer, A. PY - 2010 DA - 2010// TI - Readiness of the ATLAS liquid argon calorimeter for LHC collisions T2 - Eur. Phys. J. C JO - European Physical Journal C SP - 723 EP - 753 VL - 70 IS - 3 PB - Springer AB - The ATLAS liquid argon calorimeter has been operating continuously since August 2006. At this time, only part of the calorimeter was readout, but since the beginning of 2008, all calorimeter cells have been connected to the ATLAS readout system in preparation for LHC collisions. This paper gives an overview of the liquid argon calorimeter performance measured in situ with random triggers, calibration data, cosmic muons, and LHC beam splash events. Results on the detector operation, timing performance, electronics noise, and gain stability are presented. High energy deposits from radiative cosmic muons and beam splash events allow to check the intrinsic constant term of the energy resolution. The uniformity of the electromagnetic barrel calorimeter response along eta (averaged over phi) is measured at the percent level using minimum ionizing cosmic muons. Finally, studies of electromagnetic showers from radiative muons have been used to cross-check the Monte Carlo simulation. The performance results obtained using the ATLAS readout, data acquisition, and reconstruction software indicate that the liquid argon calorimeter is well-prepared for collisions at the dawn of the LHC era. SN - 1434-6044 UR - http://arxiv.org/abs/0912.2642 UR - https://doi.org/10.1140/epjc/s10052-010-1354-y DO - 10.1140/epjc/s10052-010-1354-y LA - English N1 - ISI:000285200000011 ID - ATLASCollaborationAad_etal2010 ER -