Commissioning of the ATLAS Liquid Argon Calorimeter
S. Laplace

TL;DR
The paper reports on three years of in-situ commissioning of the ATLAS liquid argon calorimeter, including calibration, cosmic muon analysis, and beam splash events, confirming performance at expected levels.
Contribution
It presents the comprehensive commissioning process and performance validation of the ATLAS liquid argon calorimeter using various in-situ data over three years.
Findings
Calibration constants established for initial collisions
Calorimeter performance matches expectations
Stable operation achieved during commissioning
Abstract
The in-situ commissioning of the ATLAS liquid argon calorimeter is taking place since three years. During this period, it has been fully tested by means of frequent calibration runs, and the analysis of the large cosmic muon data samples and of the few beam splash events that occurred on September 10th, 2008. This has allowed to obtain a stable set of calibration constants for the first collisions, and to measure the in-situ calorimeter performances that were found to be at the expected level.
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