Performance of prototypes for the ALICE electromagnetic calorimeter

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

Research output: Contribution to journalArticlepeer-review

26 Scopus citations

Abstract

The performance of prototypes for the ALICE electromagnetic sampling calorimeter has been studied in test beam measurements at FNAL and CERN. A 4 × 4 array of final design modules showed an energy resolution of about 11 % / sqrt(E (GeV)) ⊕ 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 mm ⊕ 5.3 mm / sqrt(E (GeV)). For an electron identification efficiency of 90% a hadron rejection factor of > 600 was obtained.

Original languageEnglish
Pages (from-to)6-13
Number of pages8
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume615
Issue number1
DOIs
StatePublished - Mar 21 2010
Externally publishedYes

Funding

We gratefully acknowledge the CERN and the FNAL accelerator devisions for the good working conditions in the testbeam facilities. We would like to thank all engineers and technicians of the participating laboratories for their invaluable contribution to the construction of the EMCal. This work was supported by the Helsinki Institute of Physics and the Academy of Finnland; the French CNRS/IN2P3/INPG, the ‘Region Pays de Loire’, ‘Region Alsace’,‘Region Auvergne’ and CEA, France; the Istituto Nazionale di Fisica Nucleare (INFN) of Italy; the Office of Nuclear Physics within the United States DOE Office of Science and the United States National Science Foundation.

FundersFunder number
Academy of Finnland
Helsinki Institute of Physics
Office of Nuclear Physics
Region Auvergne’ and CEA
National Science Foundation
Istituto Nazionale di Fisica Nucleare
Conseil Régional des Pays de la Loire

    Keywords

    • Electromagnetic calorimeter
    • Energy resolution
    • Hadron rejection factor
    • Position resolution
    • Sampling calorimeter

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