Speaker
Valerio Rossetti
(Stockholm University (SE))
Description
The ATLAS general-purpose experiment at the Large Hadron Collider
(LHC) is equipped with electromagnetic and hadronic liquid-argon (LAr)
calorimeters and a hadronic scintillator-steel sampling calorimeter
(TileCal) for measuring energy and direction of final state particles
in the pseudorapidity range $|\eta| < 4.9$.
The calibration and performance of the calorimetry system was
established during beam tests, cosmic ray muon measurements and in
particular the first three years of pp collision data-taking. During
this period, referred to as Run-1, approximately 27~fb$^{-1}$ of data
have been collected at the center-of-mass energies of 7 and
8~TeV. Results on the calorimeter operation, monitoring and data
quality, as well as their performance will be presented, including the
calibration and stability of the electromagnetic scale, response
uniformity and time resolution. These results demonstrate that the
LAr and Tile calorimeters perform excellently within their design
requirements. The calorimetry system thus played a crucial role in the
Run-1 physics programme, and in the discovery of a Higgs boson.
Furthermore, the outcome from the detector consolidation after Run-1
and the major improvements for the upcoming Run-2 will be discussed.
First results from the detector commissioning using early LHC
beam-splash events in 2015 will be reported.
Authors
ATLAS LAr Speakers Committee
(ATLAS)
ATLAS Tile Speakers Committee
(ATLAS)
Co-author
Yuji Yamazaki
(Kobe University (JP))
