Karlsruhe 2024 – scientific programme

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T: Fachverband Teilchenphysik

T 79: Invited Topical Talks 5

T 79.1: Invited Topical Talk

Thursday, March 7, 2024, 14:00–14:30, Geb. 30.21: Gerthsen-HS

Construction, Commissioning, and Performance of the new ATLAS Level1-Trigger System for Run 3 — •Ralf Gugel — JGU Mainz

Already before the formal transition from LHC to HL-LHC various improvements on the accelerator side provide opportunities and challenges alike: higher instantaneous luminosity as well as increased pileup. In order to maximally benefit from this during the LHC Run 3 and as a first step towards HL-LHC, the ATLAS Level1-Trigger System has been upgraded in order to improve the accuracy of selecting the most interesting collisions. Following a brief introduction to requirements and resulting design choices for such a system the additions and modifications to the ATLAS Level1-Trigger System are presented with a focus on the calorimeter based trigger path. Further more selected aspects of the integration of the new subsystems among each other and into ATLAS, and achieved/anticipated physics performance are discussed.

Keywords: ATLAS; Level1; Trigger; Hardware