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An Upgraded ATLAS Central Trigger for 2014 LHC Luminosities

During 2011, the LHC reached instantaneous luminosities of 4*10^33 cm^-1*s^-1 and produced events with up to 24 interactions per colliding proton bunch. This places stringent operational and physical requirements on the ATLAS Trigger in order to reduce the 40MHz collision rate to a manageable event...

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Autor principal: Kaneda, M
Lenguaje:eng
Publicado: 2012
Materias:
Acceso en línea:http://cds.cern.ch/record/1488877
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author Kaneda, M
author_facet Kaneda, M
author_sort Kaneda, M
collection CERN
description During 2011, the LHC reached instantaneous luminosities of 4*10^33 cm^-1*s^-1 and produced events with up to 24 interactions per colliding proton bunch. This places stringent operational and physical requirements on the ATLAS Trigger in order to reduce the 40MHz collision rate to a manageable event storage rate of ~400Hz and, at the same time, selecting those events considered interesting. The Level-1 Trigger is the first rate-reducing step in the ATLAS Trigger, with an output rate of 75kHz and a decision latency of less than 2.5us. It is primarily composed of the Calorimeter Trigger, Muon Trigger, and the Central Trigger Processor which are implemented in custom built VME electronics. The Central Trigger Processor collects trigger information from all Level-1 systems and produces a Level-1 trigger decision that initiates the readout of all ATLAS sub-detectors. In 2014, the LHC will run at a center of mass energy of 14 TeV, compared to the current 8 TeV, and the luminosity will exceed 10^34 cm^-1*s^-1. With higher luminosities, the required number and complexity of Level-1 triggers will increase in order to satisfy the physics goals of ATLAS while keeping the total Level-1 rates at or below 100kHz. It is also foreseen to install a Level-1 Topological trigger in the 2013 shutdown period to further improve the selection at this trigger stage. In order to process more trigger inputs and the additional hardware, the Central Trigger Processor will be upgraded during the 2013 shutdown. We will discuss the current Central Trigger Processor, the justification for the upgrade, and the proposed upgrade to satisfy the requirements of the 2014 physics run at the LHC.
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spelling cern-14888772019-09-30T06:29:59Zhttp://cds.cern.ch/record/1488877engKaneda, MAn Upgraded ATLAS Central Trigger for 2014 LHC LuminositiesDetectors and Experimental TechniquesDuring 2011, the LHC reached instantaneous luminosities of 4*10^33 cm^-1*s^-1 and produced events with up to 24 interactions per colliding proton bunch. This places stringent operational and physical requirements on the ATLAS Trigger in order to reduce the 40MHz collision rate to a manageable event storage rate of ~400Hz and, at the same time, selecting those events considered interesting. The Level-1 Trigger is the first rate-reducing step in the ATLAS Trigger, with an output rate of 75kHz and a decision latency of less than 2.5us. It is primarily composed of the Calorimeter Trigger, Muon Trigger, and the Central Trigger Processor which are implemented in custom built VME electronics. The Central Trigger Processor collects trigger information from all Level-1 systems and produces a Level-1 trigger decision that initiates the readout of all ATLAS sub-detectors. In 2014, the LHC will run at a center of mass energy of 14 TeV, compared to the current 8 TeV, and the luminosity will exceed 10^34 cm^-1*s^-1. With higher luminosities, the required number and complexity of Level-1 triggers will increase in order to satisfy the physics goals of ATLAS while keeping the total Level-1 rates at or below 100kHz. It is also foreseen to install a Level-1 Topological trigger in the 2013 shutdown period to further improve the selection at this trigger stage. In order to process more trigger inputs and the additional hardware, the Central Trigger Processor will be upgraded during the 2013 shutdown. We will discuss the current Central Trigger Processor, the justification for the upgrade, and the proposed upgrade to satisfy the requirements of the 2014 physics run at the LHC.ATL-DAQ-SLIDE-2012-590oai:cds.cern.ch:14888772012-10-19
spellingShingle Detectors and Experimental Techniques
Kaneda, M
An Upgraded ATLAS Central Trigger for 2014 LHC Luminosities
title An Upgraded ATLAS Central Trigger for 2014 LHC Luminosities
title_full An Upgraded ATLAS Central Trigger for 2014 LHC Luminosities
title_fullStr An Upgraded ATLAS Central Trigger for 2014 LHC Luminosities
title_full_unstemmed An Upgraded ATLAS Central Trigger for 2014 LHC Luminosities
title_short An Upgraded ATLAS Central Trigger for 2014 LHC Luminosities
title_sort upgraded atlas central trigger for 2014 lhc luminosities
topic Detectors and Experimental Techniques
url http://cds.cern.ch/record/1488877
work_keys_str_mv AT kanedam anupgradedatlascentraltriggerfor2014lhcluminosities
AT kanedam upgradedatlascentraltriggerfor2014lhcluminosities