The Central Trigger Processor Monitoring module (CTP_MON) in the ATLAS Level-1 Trigger System

The Central Trigger Processor (CTP) receives a 160-bit trigger pattern from the Calorimeter and Muon Trigger sub-systems at 40 MHz update rate, corresponding to the 25 ns bunch-crossing period of the LHC. This information is evaluated against a trigger menu to form the general Level-1 Accept (L1A) s...

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Detalles Bibliográficos
Autores principales: Ellis, Nick, Farthouat, Philippe, Gällnö, P, Schuler, G A, Spiwoks, R, Teixeira, R, Pessoa-Lima, H, De Seixas, J M
Lenguaje:eng
Publicado: 2003
Materias:
Detectors and Experimental Techniques
Acceso en línea:http://cds.cern.ch/record/710334
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author Ellis, Nick
Farthouat, Philippe
Gällnö, P
Schuler, G A
Spiwoks, R
Teixeira, R
Pessoa-Lima, H
De Seixas, J M
author_facet Ellis, Nick
Farthouat, Philippe
Gällnö, P
Schuler, G A
Spiwoks, R
Teixeira, R
Pessoa-Lima, H
De Seixas, J M
author_sort Ellis, Nick
collection CERN
description The Central Trigger Processor (CTP) receives a 160-bit trigger pattern from the Calorimeter and Muon Trigger sub-systems at 40 MHz update rate, corresponding to the 25 ns bunch-crossing period of the LHC. This information is evaluated against a trigger menu to form the general Level-1 Accept (L1A) signal. The CTP Monitoring module (CTP_MON) monitors the trigger inputs of the CTP on a bunch-by-bunch basis in order to monitor trigger rates per bunch and detect any pathological bunches in the LHC machine. This information can also be used to estimate the luminosity per bunch. The monitoring system is able to build histograms of the input data at the maximum possible rate, with one 30-bit counter per input bit for each of the 3564 possible bunch positions in the LHC giving at least 26 hours of free running without overflow condition. The design and simulation of the CTP_MON will be presented.
id cern-710334
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2003
record_format invenio
spelling cern-7103342019-09-30T06:29:59Zhttp://cds.cern.ch/record/710334engEllis, NickFarthouat, PhilippeGällnö, PSchuler, G ASpiwoks, RTeixeira, RPessoa-Lima, HDe Seixas, J MThe Central Trigger Processor Monitoring module (CTP_MON) in the ATLAS Level-1 Trigger SystemDetectors and Experimental TechniquesThe Central Trigger Processor (CTP) receives a 160-bit trigger pattern from the Calorimeter and Muon Trigger sub-systems at 40 MHz update rate, corresponding to the 25 ns bunch-crossing period of the LHC. This information is evaluated against a trigger menu to form the general Level-1 Accept (L1A) signal. The CTP Monitoring module (CTP_MON) monitors the trigger inputs of the CTP on a bunch-by-bunch basis in order to monitor trigger rates per bunch and detect any pathological bunches in the LHC machine. This information can also be used to estimate the luminosity per bunch. The monitoring system is able to build histograms of the input data at the maximum possible rate, with one 30-bit counter per input bit for each of the 3564 possible bunch positions in the LHC giving at least 26 hours of free running without overflow condition. The design and simulation of the CTP_MON will be presented.ATL-DAQ-2004-005oai:cds.cern.ch:7103342003-11-20
spellingShingle Detectors and Experimental Techniques
Ellis, Nick
Farthouat, Philippe
Gällnö, P
Schuler, G A
Spiwoks, R
Teixeira, R
Pessoa-Lima, H
De Seixas, J M
The Central Trigger Processor Monitoring module (CTP_MON) in the ATLAS Level-1 Trigger System
title The Central Trigger Processor Monitoring module (CTP_MON) in the ATLAS Level-1 Trigger System
title_full The Central Trigger Processor Monitoring module (CTP_MON) in the ATLAS Level-1 Trigger System
title_fullStr The Central Trigger Processor Monitoring module (CTP_MON) in the ATLAS Level-1 Trigger System
title_full_unstemmed The Central Trigger Processor Monitoring module (CTP_MON) in the ATLAS Level-1 Trigger System
title_short The Central Trigger Processor Monitoring module (CTP_MON) in the ATLAS Level-1 Trigger System
title_sort central trigger processor monitoring module (ctp_mon) in the atlas level-1 trigger system
topic Detectors and Experimental Techniques
url http://cds.cern.ch/record/710334
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