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The Run-2 ATLAS Trigger System
The ATLAS trigger has been successfully collecting collision data during the first run of the LHC between 2009-2013 at a centre-of-mass energy between 900 GeV and 8 TeV. The trigger system consists of a hardware Level-1 (L1) and a software based high-level trigger (HLT) that reduces the event rate f...
Autores principales: | , |
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Lenguaje: | eng |
Publicado: |
2016
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Materias: | |
Acceso en línea: | http://cds.cern.ch/record/2127944 |
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author | Shaw, Savanna Marie ATLAS Collaboration |
author_facet | Shaw, Savanna Marie ATLAS Collaboration |
author_sort | Shaw, Savanna Marie |
collection | CERN |
description | The ATLAS trigger has been successfully collecting collision data during the first run of the LHC between 2009-2013 at a centre-of-mass energy between 900 GeV and 8 TeV. The trigger system consists of a hardware Level-1 (L1) and a software based high-level trigger (HLT) that reduces the event rate from the design bunch-crossing rate of 40 MHz to an average recording rate of a few hundred Hz. In Run-2, the LHC will operate at centre-of-mass energies of 13 and 14 TeV resulting in roughly five times higher trigger rates. We will briefly review the ATLAS trigger system upgrades that were implemented during the shutdown, allowing us to cope with the increased trigger rates while maintaining or even improving our efficiency to select relevant physics processes. This includes changes to the L1 calorimeter and muon trigger systems, the introduction of a new L1 topological trigger module and the merging of the previously two-level HLT system into a single event filter farm. At hand of a few examples, we will show the impressive performance improvements in the HLT trigger algorithms used to identify leptons, hadrons and global event quantities like missing transverse energy. Finally, we will present the commissioning of the trigger system and its performance from the 2015 run. |
id | cern-2127944 |
institution | Organización Europea para la Investigación Nuclear |
language | eng |
publishDate | 2016 |
record_format | invenio |
spelling | cern-21279442019-09-30T06:29:59Zhttp://cds.cern.ch/record/2127944engShaw, Savanna MarieATLAS CollaborationThe Run-2 ATLAS Trigger SystemParticle Physics - ExperimentThe ATLAS trigger has been successfully collecting collision data during the first run of the LHC between 2009-2013 at a centre-of-mass energy between 900 GeV and 8 TeV. The trigger system consists of a hardware Level-1 (L1) and a software based high-level trigger (HLT) that reduces the event rate from the design bunch-crossing rate of 40 MHz to an average recording rate of a few hundred Hz. In Run-2, the LHC will operate at centre-of-mass energies of 13 and 14 TeV resulting in roughly five times higher trigger rates. We will briefly review the ATLAS trigger system upgrades that were implemented during the shutdown, allowing us to cope with the increased trigger rates while maintaining or even improving our efficiency to select relevant physics processes. This includes changes to the L1 calorimeter and muon trigger systems, the introduction of a new L1 topological trigger module and the merging of the previously two-level HLT system into a single event filter farm. At hand of a few examples, we will show the impressive performance improvements in the HLT trigger algorithms used to identify leptons, hadrons and global event quantities like missing transverse energy. Finally, we will present the commissioning of the trigger system and its performance from the 2015 run.ATL-DAQ-SLIDE-2016-041oai:cds.cern.ch:21279442016-02-01 |
spellingShingle | Particle Physics - Experiment Shaw, Savanna Marie ATLAS Collaboration The Run-2 ATLAS Trigger System |
title | The Run-2 ATLAS Trigger System |
title_full | The Run-2 ATLAS Trigger System |
title_fullStr | The Run-2 ATLAS Trigger System |
title_full_unstemmed | The Run-2 ATLAS Trigger System |
title_short | The Run-2 ATLAS Trigger System |
title_sort | run-2 atlas trigger system |
topic | Particle Physics - Experiment |
url | http://cds.cern.ch/record/2127944 |
work_keys_str_mv | AT shawsavannamarie therun2atlastriggersystem AT atlascollaboration therun2atlastriggersystem AT shawsavannamarie run2atlastriggersystem AT atlascollaboration run2atlastriggersystem |