CERN Accelerating science

ATLAS Note
Report number	ATL-DAQ-PROC-2018-024
Title	Level-1 Calorimeter Trigger: From Virtex-7 to UltraScale+
Author(s)	Weirich, Marcel (Mainz U., Inst. Phys.)
Collaboration	ATLAS Collaboration
Publication	SISSA, 2019
Imprint	15 Oct 2018
Number of pages	4
In:	PoS ICHEP2018 (2019) 203
In:	XXXIX International Conference on High Energy Physics, Seoul, Korea, 4 - 11 Jul 2018, pp.203
DOI	10.22323/1.340.0203
Subject category	Particle Physics - Experiment
Accelerator/Facility, Experiment	CERN LHC ; ATLAS
Free keywords	ATLAS, TDAQ, L1Calo, Phase-1, jFEX, L1Topo
Abstract	With the restart of the LHC in 2021 the ATLAS experiment has to cope with high-luminosity beams. Therefore, a new Level-1 Calorimeter Trigger system will be introduced exploiting a finer calorimeter readout granularity. The new system consists of three Feature EXtractors (FEXs) - electron FEX (eFEX), jet FEX (jFEX) and global FEX (gFEX) - that use FPGAs to reconstruct different physics objects used for the trigger selection and that gather data from the calorimeters through optical fibres. The Trigger Objects (TOBs) produced by the algorithms running on the FEXs are optically sent to the Level-1 Topological Processor (L1Topo), where interesting physics events are selected by e.g. applying kinematic and angular requirements. This contribution will focus on the new jFEX system and on the upgrade of the L1Topo giving an overview of the hardware as well as the algorithmic firmware.
Related document	Slides ATL-DAQ-SLIDE-2018-652
Copyright/License	publication: © 2019-2024 The Authors (License: CC-BY-NC-ND-4.0)

Corresponding record in: Inspire