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Rate Predictions and Trigger/DAQ Resource Monitoring in ATLAS

Since starting in 2010, the Large Hadron Collider (LHC) has produced collisions at an ever increasing rate. The ATLAS experiment successfully records the collision data with high efficiency and excel- lent data quality. Events are selected using a three-level trigger system, where each level makes a...

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Autor principal: Schaefer, D M
Lenguaje:eng
Publicado: 2012
Materias:
Acceso en línea:http://cds.cern.ch/record/1432582
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author Schaefer, D M
author_facet Schaefer, D M
author_sort Schaefer, D M
collection CERN
description Since starting in 2010, the Large Hadron Collider (LHC) has produced collisions at an ever increasing rate. The ATLAS experiment successfully records the collision data with high efficiency and excel- lent data quality. Events are selected using a three-level trigger system, where each level makes a more refined selection. The level-1 trigger (L1) consists of a custom-designed hardware trigger which seeds two higher software based trigger levels. Over 300 triggers compose a trigger menu which selects physics signatures such as electrons, muons, particle jets, etc. Each trigger consumes computing resources of the ATLAS trigger system and offline storage. The LHC instantaneous luminosity conditions, desired physics goals of the collaboration, and the limits of the trigger infrastructure determine the composition of the ATLAS trigger menu. We describe a trigger monitoring frame- work for computing the costs of individual trigger algorithms such as data request rates and CPU consumption. This framework has been used to prepare the ATLAS trigger for data taking during increases of more than six orders of magnitude in the LHC luminosity and has been influential in guiding ATLAS Trigger computing upgrades.
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institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2012
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spelling cern-14325822021-08-10T13:30:51Zhttp://cds.cern.ch/record/1432582engSchaefer, D MRate Predictions and Trigger/DAQ Resource Monitoring in ATLASDetectors and Experimental TechniquesSince starting in 2010, the Large Hadron Collider (LHC) has produced collisions at an ever increasing rate. The ATLAS experiment successfully records the collision data with high efficiency and excel- lent data quality. Events are selected using a three-level trigger system, where each level makes a more refined selection. The level-1 trigger (L1) consists of a custom-designed hardware trigger which seeds two higher software based trigger levels. Over 300 triggers compose a trigger menu which selects physics signatures such as electrons, muons, particle jets, etc. Each trigger consumes computing resources of the ATLAS trigger system and offline storage. The LHC instantaneous luminosity conditions, desired physics goals of the collaboration, and the limits of the trigger infrastructure determine the composition of the ATLAS trigger menu. We describe a trigger monitoring frame- work for computing the costs of individual trigger algorithms such as data request rates and CPU consumption. This framework has been used to prepare the ATLAS trigger for data taking during increases of more than six orders of magnitude in the LHC luminosity and has been influential in guiding ATLAS Trigger computing upgrades.ATL-DAQ-SLIDE-2012-064oai:cds.cern.ch:14325822012-03-18
spellingShingle Detectors and Experimental Techniques
Schaefer, D M
Rate Predictions and Trigger/DAQ Resource Monitoring in ATLAS
title Rate Predictions and Trigger/DAQ Resource Monitoring in ATLAS
title_full Rate Predictions and Trigger/DAQ Resource Monitoring in ATLAS
title_fullStr Rate Predictions and Trigger/DAQ Resource Monitoring in ATLAS
title_full_unstemmed Rate Predictions and Trigger/DAQ Resource Monitoring in ATLAS
title_short Rate Predictions and Trigger/DAQ Resource Monitoring in ATLAS
title_sort rate predictions and trigger/daq resource monitoring in atlas
topic Detectors and Experimental Techniques
url http://cds.cern.ch/record/1432582
work_keys_str_mv AT schaeferdm ratepredictionsandtriggerdaqresourcemonitoringinatlas