Performance of prototypes for the ALICE electromagnetic calorimeter

Allen, J.; Awes, T.; Badala, A.; Baumgart, S.; Bellwied, R.; Benhabib, L.; Bernard, C.; Bianchi, N.; Blanco, F.; Bortoli, Y.; Bourdaud, G.; Bourrion, O.; Boyer, B.; Bruna, E.; Butterworth, J.; Caines, H.; Calvo, Diaz Aldagalan D.; Capitani, G. P.; Carcagno, Y.; Casanova, Diaz A.; Cherney, M.; Conesa, Balbastre G.; Cormier, T. M.; Cunqueiro, Mendez L.; Delagrange, H.; Del Franco, M.; Dialinas, M.; Di Nezza, P.; Donoghue, A.; Elnimr, M.; Enokizono, A.; Estienne, M.; Faivre, J.; Fantoni, A.; Fichera, F.; Foglio, B.; Fresneau, S.; Fujita, J.; Furget, C.; Gadrat, S.; Garishvili, I.; Germain, M.; Giudice, N.; Gorbunov, Y.; Grimaldi, A.; Guardone, N.; Guernane, R.; Hadjidakis, C.; Hamblen, J.; Harris, J. W.; Hasch, D.; Heinz, M.; Hille, P. T.; Hornback, D.; Ichou, R.; Jacobs, P.; Jangal, S.; Jayananda, K.; Klay, J. L.; Knospe, A. G.; Kox, S.; Kral, J.; Laloux, P.; Lapointe, S.; LA ROCCA, Paola; Lewis, S.; Li, Q.; Librizzi, F.; Madagodahettige, Don D.; Martashvili, I.; Mayes, B.; Milletto, T.; Muccifora, V.; Muller, H.; Muraz, J. F.; Nattrass, C.; Noto, Francesco; Novitzky, N.; Odyniec, G.; Orlandi, A.; Palmeri, A.; Pappalardo, G. S.; Pavlinov, A.; Pesci, W.; Petrov, V.; Petta, Catia Maria Annunziata; Pichot, P.; Pinsky, L.; Ploskon, M.; Pompei, F.; Pulvirenti, A.; Putschke, J.; Pruneau, C. A.; Rak, J.; Rasson, J.; Read, K. F.; Real, J. S.; Reolon, A. R.; Riggi, Francesco; Riso, J.; Ronchetti, F.; Roy, C.; Roy, D.; Salemi, M.; Salur, S.; Sharma, M.; Silvermyr, D.; Smirnov, N.; Soltz, R.; Sparti, V.; Stutzmann, J. S.; Symons, T. J. M.; Tarazona Martinez, A.; Tarini, L.; Thomen, R.; Timmins, A.; van Leeuwen, M.; Vieira, R.; Viticchie, A.; Voloshin, S.; Wang, D.; Wang, Y.; Ward, R. M.

doi:10.1016/j.nima.2009.12.061

The performance of prototypes for the ALICE electromagnetic sampling calorimeter has been studied in test beam measurements at FNAL and CERN. A 4 x 4 array of final design modules showed an energy resolution of about 11%/root E(GeV) circle plus 1.7% with a uniformity of the response to electrons of 1% and a good linearity in the energy range from 10 to 100 GeV. The electromagnetic shower position resolution was found to be described by 1.5 min circle plus 5.3 mm/root E(GeV). For an electron identification efficiency of 90% a hadron rejection factor of >600 was obtained. (C) 2009 Elsevier B.V. All rights reserved.