Readiness of the ATLAS liquid argon calorimeter for LHC collisions
Popovic, D. S.
Vranješ Milosavljević, Marija
ATLAS Collaboration (ukupan broj autora: 2792)
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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 perfor...mance 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.
Извор:European Physical Journal C. Particles and Fields, 2010, 70, 3, 723-753
- ANPCyT, Argentina, Yerevan Physics Institute, Armenia, ARC, Australia, DEST, Australia, Bundesministerium fur Wissenschaft und Forschung, Austria, National Academy of Sciences of Azerbaijan, State Committee on Science AMP, Technologies of the Republic of Belarus, CNPq, Brazil, FINEP, Brazil, NSERC, Canada, NRC, Canada, CFI, Canada, CERN, NSFC, China, Ministry of Education, Youth and Sports of the Czech Republic, Ministry of Industry and Trade of the Czech Republic, Committee for Collaboration of the Czech Republic with CERN, Danish Natural Science Research Council, European Commission, through the ARTEMIS Research Training Network, CNRS, France [IN2P3], Dapnia-CEA, France, Georgian Academy of Sciences, BMBF, Germany, DESY, Germany, DFG, Germany, MPG, Germany, Ministry of Education and Religion, Greece, GSRT, Greece, ISF, Israel, MINERVA, Israel, GIF, Israel, DIP, Israel, Benoziyo Center, Israel, INFN, Italy, MEXT, Japan, CNRST, Morocco, FOM, Netherlands, NWO, Netherlands, Research Council of Norway, Ministry of Science and Higher Education, Poland, GRICES, Portugal, FCT, Portugal, Ministry of Education and Research, Romania, Ministry of Education and Science of the Russian Federation, Russian Federal Agency of Science and Innovations, Russian Federal Agency of Atomic Energy, JINR, Ministry of Science, Serbia, Department of International Science and Technology Cooperation, Ministry of Education of the Slovak Republic, Slovenian Research Agency, Slovenia, Ministry of Higher Education, Science and Technology, Slovenia, Ministerio de Educacion y Ciencia, Spain, Swedish Research Council, The Knut and Alice Wallenberg Foundation, Sweden, State Secretariat for Education and Science, Switzerland, Swiss National Science Foundation, Switzerland, Cantons of Bern and Geneva, Switzerland, National Science Council, Taiwan, TAEK, Turkey, Science and Technology Facilities Council, United Kingdomand, Leverhulme Trust, United Kingdom, DOE, United States of America, NSF, United States of America
ISSN: 1434-6044 (print); 1434-6052 (electronic)