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Dortmund 2021 – scientific programme

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T: Fachverband Teilchenphysik

T 66: DAQ, trigger and electronics III

T 66.7: Talk

Wednesday, March 17, 2021, 17:30–17:45, Tp

First level EM trigger algorithms in the ATLAS forward region for the HL-LHC — •Julian Fischer and Stefan Tapprogge — Institut für Physik, Johannes Gutenberg-Universtät, Mainz

The High-Luminosity Large Hadron Collider (HL-LHC) at CERN is a planned upgrade of the Large Hadron Collider (LHC) that will increase its instantaneous luminosity of up to a factor of five in pp-collisions. In order to exploit the full potential of the HL-LHC the first level trigger of the ATLAS experiment will have to efficiently find electromagnetic objects in the forward region, corresponding to pseudorapidity ranges of |η|>2.5. A dedicated ’forward Feature EXtractor’ (fFEX) is in development for the high-luminosity upgrade to trigger jets as well as electromagnetic objects in the ATLAS forward region making use of the full granularity of the calorimeters. Dedicated hardware modules with FPGAs are to be developed to cover both forward directions of the detector in order to process the large amount of data delivered by the HL-LHC. This contribution will highlight the development of candidate algorithms that are designed to trigger electromagnetic objects on the fFEX modules. Performance studies will be shown and different concepts investigated to tackle the challenging geometries in this particular detector region while considering the restrictions imposed by the firmware implementation.

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