Karlsruhe 2024 – scientific programme

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T: Fachverband Teilchenphysik

T 41: Trigger+DAQ 1

T 41.2: Talk

Tuesday, March 5, 2024, 16:15–16:30, Geb. 30.23: 3/1

Development of First Level Trigger Algorithm for Electron Identification in ATLAS — Julia Troppens, •Maximilian Linkert, Dennis Layh, and Stefan Tapprogge — Institute for Physics, Johannes Gutenberg University, Mainz

As part of the High Luminosity LHC upgrade a new module for the first-level trigger of ATLAS aims to efficiently identify electrons in the very forward region (3.2<|eta|<4.9). These modules with powerful FPGAs shall make use of the full granularity of the calorimeters in this region. The studies performed are based on simulated proton-proton collisions. Firstly, different algorithms - including existing classical algorithms and new machine-learning based approaches - are optimized with respect to signal efficiency and background rejection. Subsequently, the implementation in firmware is investigated. In this contribution different algorithms are compared looking at the interplay of latency, resource usage, signal efficiency and background rejection.

Keywords: first level trigger; deep learning; FPGA; ATLAS; algorithms