The energy resolution of the barrel part of the CMS Electromagnetic Calorimeter has been studied using electrons of 20 to 250 GeV in a test beam. The incident electron's energy was reconstructed by summing the energy measured in arrays of 3×3 or 5×5 channels. There was no significant amount of correlated noise observed within these arrays. For electrons incident at the centre of the studied 3×3 arrays of crystals, the mean stochastic term was measured to be 2.8% and the mean constant term to be 0.3%. The amount of the incident electrons' energy which is contained within the array depends on its position of incidence. The variation of the containment with position is corrected for using the distribution of the measured energy within the array. For uniform illumination of a crystal with 120 GeV electrons a resolution of 0.5% was achieved. The energy resolution meets the design goal for the detector. © 2007 IOP Publishing Ltd and SISSA.

Adzic, P., Alemany-Fernandez, R., Almeida, C., Almeida, N., Anagnostou, G., Anfreville, M., et al. (2007). Energy resolution of the barrel of the CMS Electromagnetic Calorimeter. JOURNAL OF INSTRUMENTATION, 2, P04004 [10.1088/1748-0221/2/04/P04004].

Energy resolution of the barrel of the CMS Electromagnetic Calorimeter

Ghezzi, A.;Longo, E.;Malberti, M.;Paganoni, M.;Pullia, A.;Ragazzi, S.;Rovelli, C.;DOS SANTOS, CARLA MARISA;De Fatis, T. Tabarelli;VIGANO', SARA;Zhang, J.;
2007

Abstract

The energy resolution of the barrel part of the CMS Electromagnetic Calorimeter has been studied using electrons of 20 to 250 GeV in a test beam. The incident electron's energy was reconstructed by summing the energy measured in arrays of 3×3 or 5×5 channels. There was no significant amount of correlated noise observed within these arrays. For electrons incident at the centre of the studied 3×3 arrays of crystals, the mean stochastic term was measured to be 2.8% and the mean constant term to be 0.3%. The amount of the incident electrons' energy which is contained within the array depends on its position of incidence. The variation of the containment with position is corrected for using the distribution of the measured energy within the array. For uniform illumination of a crystal with 120 GeV electrons a resolution of 0.5% was achieved. The energy resolution meets the design goal for the detector. © 2007 IOP Publishing Ltd and SISSA.
Articolo in rivista - Articolo scientifico
Energy resolution, calorimetry, ECAL, CMS
English
2007
2
P04004
none
Adzic, P., Alemany-Fernandez, R., Almeida, C., Almeida, N., Anagnostou, G., Anfreville, M., et al. (2007). Energy resolution of the barrel of the CMS Electromagnetic Calorimeter. JOURNAL OF INSTRUMENTATION, 2, P04004 [10.1088/1748-0221/2/04/P04004].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/14764
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