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ATLAS Level-1 Topological Trigger

The ATLAS experiment has introduced and recently commissioned a completely new hardware sub-system of its first-level trigger: the topological processor (L1Topo). L1Topo consist of two AdvancedTCA blades mounting state-of-the-art FPGA processors, providing high input bandwidth (up to 4 Gb/s) and low...

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Detalles Bibliográficos
Autores principales: Zheng, Daniel, Hong, Tae Min
Lenguaje:eng
Publicado: 2018
Materias:
Acceso en línea:http://cds.cern.ch/record/2304198
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author Zheng, Daniel
Hong, Tae Min
author_facet Zheng, Daniel
Hong, Tae Min
author_sort Zheng, Daniel
collection CERN
description The ATLAS experiment has introduced and recently commissioned a completely new hardware sub-system of its first-level trigger: the topological processor (L1Topo). L1Topo consist of two AdvancedTCA blades mounting state-of-the-art FPGA processors, providing high input bandwidth (up to 4 Gb/s) and low latency data processing (200 ns). L1Topo is able to select collision events by applying kinematic and topological requirements on candidate objects (energy clusters, jets, and muons) measured by calorimeters and muon sub-detectors. Results from data recorded using the L1Topo trigger will be presented. These results demonstrate a significantly improved background event rejection, thus allowing for a rate reduction without efficiency loss. This improvement has been shown for several physics processes leading to low-pT leptons, including H->tau tau and J/Psi->mu mu. In addition to describing the L1Topo trigger system, we will discuss the use of an accurate L1Topo simulation as a powerful tool to validate and optimize the performance of this new system. To reach the required accuracy, the simulation must mimic the approximations applied in firmware to execute the kinematic calculations.
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institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2018
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spelling cern-23041982019-09-30T06:29:59Zhttp://cds.cern.ch/record/2304198engZheng, DanielHong, Tae MinATLAS Level-1 Topological TriggerParticle Physics - ExperimentThe ATLAS experiment has introduced and recently commissioned a completely new hardware sub-system of its first-level trigger: the topological processor (L1Topo). L1Topo consist of two AdvancedTCA blades mounting state-of-the-art FPGA processors, providing high input bandwidth (up to 4 Gb/s) and low latency data processing (200 ns). L1Topo is able to select collision events by applying kinematic and topological requirements on candidate objects (energy clusters, jets, and muons) measured by calorimeters and muon sub-detectors. Results from data recorded using the L1Topo trigger will be presented. These results demonstrate a significantly improved background event rejection, thus allowing for a rate reduction without efficiency loss. This improvement has been shown for several physics processes leading to low-pT leptons, including H->tau tau and J/Psi->mu mu. In addition to describing the L1Topo trigger system, we will discuss the use of an accurate L1Topo simulation as a powerful tool to validate and optimize the performance of this new system. To reach the required accuracy, the simulation must mimic the approximations applied in firmware to execute the kinematic calculations.ATL-DAQ-SLIDE-2018-085oai:cds.cern.ch:23041982018-02-12
spellingShingle Particle Physics - Experiment
Zheng, Daniel
Hong, Tae Min
ATLAS Level-1 Topological Trigger
title ATLAS Level-1 Topological Trigger
title_full ATLAS Level-1 Topological Trigger
title_fullStr ATLAS Level-1 Topological Trigger
title_full_unstemmed ATLAS Level-1 Topological Trigger
title_short ATLAS Level-1 Topological Trigger
title_sort atlas level-1 topological trigger
topic Particle Physics - Experiment
url http://cds.cern.ch/record/2304198
work_keys_str_mv AT zhengdaniel atlaslevel1topologicaltrigger
AT hongtaemin atlaslevel1topologicaltrigger