Speaker
Arno Straessner
(Technische Universitaet Dresden (DE))
Description
The ATLAS detector was designed and built to study proton-proton
collisions produced at the LHC at centre-of-mass energies up to 14 TeV
and instantaneous luminosities up to
$10^{34}~\mathrm{cm^{-2}s^{-1}}$. Liquid argon (LAr) sampling
calorimeters are employed for all electromagnetic calorimetry in the
pseudorapidity region $|\eta|<3.2$, and for hadronic calorimetry in
the region from $|\eta|=1.5$ to $|\eta|=4.9$. In the first LHC run a
total luminosity of $27~\mathrm{fb^{-1}}$ has been collected at
center-of-mass energies of 7-8 TeV with very high operational
efficiency of the LAr Calorimeters and excellent performance. The well
calibrated and highly granular detector achieved its design values
both in energy measurement as well as in direction resolution, which
was a main ingredient for the successul discovery of a Higgs boson in
the di-photon decay channel.
This contribution will give an overview of the commissioning and
performance of the ATLAS LAr Calorimeters during the 13-14 TeV run of
the LHC, the so-called Run-2. Synchronisation of the signal timing in the different detector areas was verified from beam-splash events, even before the
proton collisions started. First Run-2 results on data quality and LAr
Calorimeter performance for electrons, photons and jets at 13-14 TeV centre-of-mass energy will be presented.
Primary author
Arno Straessner
(Technische Universitaet Dresden (DE))
