PoS - Proceedings of Science
Volume 398 - The European Physical Society Conference on High Energy Physics (EPS-HEP2021) - T12: Detector R&D and Data Handling
The phase-1 upgrade of the ATLAS level-1 calorimeter trigger
E.A. Smith*  on behalf of the ATLAS TDAQ Collaboration
Full text: pdf
Pre-published on: February 17, 2022
Published on: May 12, 2022
The ATLAS level-1 calorimeter trigger is a hardware-based system that identifies events containing calorimeter-based physics objects, including electrons, photons, taus, jets, and missing transverse energy. In preparation for Run 3, when the LHC will run at higher energy and instantaneous luminosity, the level-1 calorimeter trigger is currently implementing a significant program of planned upgrades. The existing hardware will be replaced by a new system of feature extractor modules, which will process finer-granularity information from the calorimeters and execute more sophisticated algorithms to identify physics objects; these upgrades will permit better performance in a challenging high-luminosity and high-pileup environment. The features of the upgraded level-1 calorimeter trigger and the plans for production, installation, and commissioning will be described and in addition, the expected performance of the system in Run 3 will be discussed.
DOI: https://doi.org/10.22323/1.398.0754
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