Speaker
Mr
Frank Seifert
(TU Dresden)
Description
The ATLAS calorimeter is composed by detectors based on different
techniques to exploit the best performance while maintaining a
sufficient radiation resistance in each geometrical region. Radiation
resistant liquid argon (LAr) sampling calorimeters are used for all
electromagnetic sections, for the endcap (HEC) and forward (FCal)
hadronic sections. The most central hadronic section is instead, a
steel-scintillator sampling calorimeter. While LHC data-taking is
expected to continue for a number of years, plans are already being
developed for operation of the LHC and the detectors at an increased
instantaneous luminosity about 5 times the original design
value. There are plans for a two-phase detector upgrade. For phase-1,
the LAr calorimeter trigger will be upgraded with new digital tower
builder boards being designed to receive higher granularity signals,
digitize them on the detector and send them via fast optical links to
a new digital processing system. For phase-2 TileCal upgrade consists
in replacing the on- and off-detector electronics so that all
calorimeter signals are directly digitized and sent to the
off-detector electronics in the counting room. Phase-2 upgrades being
considered for the LAr system include changes to the DAQ, the HEC cold
electronics and the FCal. Development work for these options includes
high rate tests of small test modules of the endcap and forward
detectors. Proposed solutions for LAr operations in phase-2 will be
discussed.
for the collaboration
ATLAS Liquid Argon Calorimeter Group
