Cargando…
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...
Autores principales: | , |
---|---|
Lenguaje: | eng |
Publicado: |
2018
|
Materias: | |
Acceso en línea: | http://cds.cern.ch/record/2304198 |
_version_ | 1780957443743809536 |
---|---|
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. |
id | cern-2304198 |
institution | Organización Europea para la Investigación Nuclear |
language | eng |
publishDate | 2018 |
record_format | invenio |
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 |