Speaker
Dr
Emily Anne Smith
(CERN)
Description
The ATLAS level-1 calorimeter trigger is a custom-built hardware system
that identifies events containing calorimeter-based physics objects,
including electrons, photons, taus, jets, and missing transverse energy.
In Run 3, L1Calo has been upgraded to process higher granularity
input data. The new trigger, currently running in parallel with the
legacy system, comprises several FPGA-based feature extractor modules,
which process the new digital information from the calorimeters and
execute more sophisticated trigger algorithms. The design of the
system will be presented along with an analysis of the improved
performance of the upgrade in the increasingly challenging Run-3
LHC pile-up environment.
Primary author
Stewart Martin-Haugh
(RAL)
