Abstract
During a combined test beam in summer 2004 a slice of the ATLAS barrel detector (including all detector sub systems from the inner tracker, the calorimetry to the muon system) was exposed to particle beams (electrons, pions, photons and muons) with different energies (1 GeV to 350 GeV). The aim was to study the combined performance of the different detector sub systems in ATLAS-like conditions. We will present the electronics calibration scheme of the electromagnetic calorimeter and its implementation. The following studies on the combined test beam data have been performed and will be presented: performance of the electromagnetic calorimetry down to very low energies (E < 10 GeV). These measurements have been compared to Monte Carlo simulations showing a good agreement to the data. Results for electrons will be presented and compared to MC simulation.
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