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ATLAS TDAQ system: current status and performance

In this paper we will report on the operation and the performance of the ATLAS data-flow system during the 2011 physics run of the Large Hadron Collider (LHC) at 7\,\mathrm{TeV}. The data-flow system is responsible for reading out, formatting and conveying the event data, eventually saving the selec...

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Detalles Bibliográficos
Autores principales: Ballestrero, S, Vandelli, W, Avolio, G
Lenguaje:eng
Publicado: 2011
Materias:
Acceso en línea:https://dx.doi.org/10.1016/j.phpro.2012.03.755
http://cds.cern.ch/record/1382464
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author Ballestrero, S
Vandelli, W
Avolio, G
author_facet Ballestrero, S
Vandelli, W
Avolio, G
author_sort Ballestrero, S
collection CERN
description In this paper we will report on the operation and the performance of the ATLAS data-flow system during the 2011 physics run of the Large Hadron Collider (LHC) at 7\,\mathrm{TeV}. The data-flow system is responsible for reading out, formatting and conveying the event data, eventually saving the selected events into the mass storage. In 2010 the ATLAS Trigger and Data Acquisition (TDAQ) system has been operated with an overall efficiency of 96%, while meeting evolving and demanding conditions. By the end of the proton run, the LHC instantaneous peak luminosity had increased by 5 orders of magnitudes. Correspondingly the ATLAS first-level trigger rate grew by a factor 100, reaching 40 kHz, roughly half of the design rate. Concurrently, the event building and data saving rates reached and exceeded the design performance. Moreover, the installation of additional computing power yielded a system whose characteristics are now comparable with the final ones. In this paper we will report on achievements and problematics encountered during 2010 and 2011. On this basis, we will follow discussing the preparations for the remaining 2011 data-taking period, in particular with respect to the expected increase in LHC luminosity and the predicted reaching of the design first-level trigger rate.
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spelling cern-13824642022-08-10T20:15:41Zdoi:10.1016/j.phpro.2012.03.755http://cds.cern.ch/record/1382464engBallestrero, SVandelli, WAvolio, GATLAS TDAQ system: current status and performanceDetectors and Experimental TechniquesIn this paper we will report on the operation and the performance of the ATLAS data-flow system during the 2011 physics run of the Large Hadron Collider (LHC) at 7\,\mathrm{TeV}. The data-flow system is responsible for reading out, formatting and conveying the event data, eventually saving the selected events into the mass storage. In 2010 the ATLAS Trigger and Data Acquisition (TDAQ) system has been operated with an overall efficiency of 96%, while meeting evolving and demanding conditions. By the end of the proton run, the LHC instantaneous peak luminosity had increased by 5 orders of magnitudes. Correspondingly the ATLAS first-level trigger rate grew by a factor 100, reaching 40 kHz, roughly half of the design rate. Concurrently, the event building and data saving rates reached and exceeded the design performance. Moreover, the installation of additional computing power yielded a system whose characteristics are now comparable with the final ones. In this paper we will report on achievements and problematics encountered during 2010 and 2011. On this basis, we will follow discussing the preparations for the remaining 2011 data-taking period, in particular with respect to the expected increase in LHC luminosity and the predicted reaching of the design first-level trigger rate.ATL-DAQ-PROC-2011-020oai:cds.cern.ch:13824642011-09-15
spellingShingle Detectors and Experimental Techniques
Ballestrero, S
Vandelli, W
Avolio, G
ATLAS TDAQ system: current status and performance
title ATLAS TDAQ system: current status and performance
title_full ATLAS TDAQ system: current status and performance
title_fullStr ATLAS TDAQ system: current status and performance
title_full_unstemmed ATLAS TDAQ system: current status and performance
title_short ATLAS TDAQ system: current status and performance
title_sort atlas tdaq system: current status and performance
topic Detectors and Experimental Techniques
url https://dx.doi.org/10.1016/j.phpro.2012.03.755
http://cds.cern.ch/record/1382464
work_keys_str_mv AT ballestreros atlastdaqsystemcurrentstatusandperformance
AT vandelliw atlastdaqsystemcurrentstatusandperformance
AT avoliog atlastdaqsystemcurrentstatusandperformance