Speaker
Blake Oliver Burghgrave
(Northern Illinois University (US))
Description
The ATLAS 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. Following a period of detector consolidation during a long shutdown,
Run-2 started in 2015 with approximately 3.9~fb$^{-1}$ of data
at a center-of-mass energy of 13~TeV recorded in this year. 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 particular, in the discovery of a Higgs boson.
Author
Collaboration ATLAS
(ATLAS)
