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 language | English |
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Pages (from-to) | 6-13 |
Number of pages | 8 |
Journal | Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment |
Volume | 615 |
Issue number | 1 |
DOIs | |
State | Published - Mar 21 2010 |
Externally published | Yes |
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.
Funders | Funder number |
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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