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J. and Sproston, M. and Stöckli, F. and Suter, H. and Swain, J. and Tabarelli de Fatis, T. and Takahashi, M. and Tancini, V. and Tcheremoukhine, A. and Teller, O. and Theofilatos, K. and Thiebaux, C. and Timciuc, V. and Timlin, C. and Titov, M. and Tobias, A. and Topkar, A. and Triantis, F. A. and Troshin, S. and Tyurin, N. and Ueno, K. and Uzunian, A. and Varela, J. and Verrecchia, P. and Veverka, J. and Vichoudis, P. and Virdee, T. and Vlassov, E. and Von Gunten, H. P. and Wang, M. and Wardrope, D. and Weber, M. and Weng, J. and Williams, J. H. and Yang, Y. and Yaselli, I. and Yohay, R. and Zabi, A. and Zamiatin, N. and Zelepoukine, S. and Zhang, J. and Zhang, L. Y. and Zhu, K. and Zhu, R. Y. (2008) Intercalibration of the barrel electromagnetic calorimeter of the CMS experiment at start-up. Journal of Instrumentation, 3 (10). P10007. ISSN 1748-0221 http://resolver.caltech.edu/CaltechAUTHORS:20090619-075709365
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Calibration of the relative response of the individual channels of the barrel electromagnetic calorimeter of the CMS detector was accomplished, before installation, with cosmic ray muons and test beams. One fourth of the calorimeter was exposed to a beam of high energy electrons and the relative calibration of the channels, the intercalibration, was found to be reproducible to a precision of about 0.3%. Additionally, data were collected with cosmic rays for the entire ECAL barrel during the commissioning phase. By comparing the intercalibration constants obtained with the electron beam data with those from the cosmic ray data, it is demonstrated that the latter provide an intercalibration precision of 1.5% over most of the barrel ECAL. The best intercalibration precision is expected to come from the analysis of events collected in situ during the LHC operation. Using data collected with both electrons and pion beams, several aspects of the intercalibration procedures based on electrons or neutral pions were investigated.
|Additional Information:||© 2008 IOP Publishing Ltd and SISSA. Received 15 September 2008, accepted for publication 24 October 2008. Published 30 October 2008. We thank the technical and administrative staff at CERN and other CMS Institutes, and acknowledge financial support from: CERN, Department of Atomic Energy and Department of Science and Technology of India, U.S. Department of Energy, U.S. National Science Foundation, Croatian Ministry of Science, Education and Sport (under grant No. 023-0982887-3064), French CNRS/Institut de Physique Nucleaire et de Physique des Particules, French Commissariat a l’Energie Atomique, Greek General Secretariat for Research and Technology, Italian Istituto Nazionale di Fisica Nucleare, Federal Agency for Science and Innovations of the Ministry for Education and Science of the Russian Federation, Federal Agency for Atomic Energy of the Russian Federation, Russian Academy of Sciences, Ministry of Science and Technological Development of Serbia, Swiss Funding Agencies, Science and Technology Facilities Council (UK).|
|Subject Keywords:||Calorimeters; Large detector systems for particle and astroparticle physics|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Ruth Sustaita|
|Deposited On:||13 Aug 2009 17:53|
|Last Modified:||25 Feb 2013 22:14|
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