SMuK 2023 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 122: DAQ Systems

T 122.1: Vortrag

Donnerstag, 23. März 2023, 15:50–16:05, POT/0106

Performance of the ATLAS Level-1 Calorimeter Trigger in Run 3 — •Thomas Junkermann — Kirchhoff-Institut für Physik, Heidelberg

The Phase-I Upgrade of the ATLAS Level-1 Calorimeter Trigger adapts the finer granularity of the spatial information of energy, provided by the upgraded front-end electronics of the Liquid-Argon calorimeter. To process the higher amounts of data a new digital trigger is installed. The new trigger has three feature extractors which each specialize on different calorimeter objects. They identify electrons, photons, taus, jets and missing energy.
The upgraded front-end components for the new digital trigger effect the old trigger system and re-calibration of it is needed as it will be run in Run 3 (started in July 2022) parallel to the new system.
The re-calibrated legacy trigger is the natural candidate to compare the new system to and offers many possibilities to compare and ultimately optimize the new system. Different calibrations are performed and eventually efficiencies and rates will give a deep insight into whether the re-calibration of the old system worked as expected and commissioning and calibration of the new system was succesful.
The new trigger is being comissioned during Run 3 and took part in first data taking. With stable running making comparisons possible, the calibration as well as efficiency studies are presented.