Journal article

Energy linearity and resolution of the ATLAS electromagnetic barrel calorimeter in an electron test-beam

M Aharrouche, J Colas, L Di Ciaccio, M El Kacimi, O Gaumer, M Gouanere, D Goujdami, R Lafaye, S Laplace, C Le Maner, L Neukermans, P Perrodo, L Poggioli, D Prieur, H Przysieznlak, G Sauvage, F Tarrade, I Wingerter-Seez, R Zitoun, F Lanni Show all

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | ELSEVIER | Published : 2006

Abstract

A module of the ATLAS electromagnetic barrel liquid argon calorimeter was exposed to the CERN electron test-beam at the H8 beam line upgraded for precision momentum measurement. The available energies of the electron beam ranged from 10 to 245 GeV. The electron beam impinged at one point corresponding to a pseudo-rapidity of η = 0.687 and an azimuthal angle of φ = 0.28 in the ATLAS coordinate system. A detailed study of several effects biasing the electron energy measurement allowed an energy reconstruction procedure to be developed that ensures a good linearity and a good resolution. Use is made of detailed Monte Carlo simulations based on GEANT4 which describe the longitudinal and transver..

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University of Melbourne Researchers