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Implementing the L1 trigger path

This note discusses two issues which have emerged recently related to the transmission of data to the DAQ system by the L1 Front-End electronics and the implementation of the L1 trigger path. Firstly the note describes a scheme to centrally broadcast the IP destinations for the L1 data channel and t...

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Autor principal: Jacobsson, R
Lenguaje:eng
Publicado: 2003
Materias:
Acceso en línea:http://cds.cern.ch/record/684449
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author Jacobsson, R
author_facet Jacobsson, R
author_sort Jacobsson, R
collection CERN
description This note discusses two issues which have emerged recently related to the transmission of data to the DAQ system by the L1 Front-End electronics and the implementation of the L1 trigger path. Firstly the note describes a scheme to centrally broadcast the IP destinations for the L1 data channel and the High-Level Trigger channel. The scheme is already supported by the TFC system, in particular by the current version of the Readout Supervisor "ODIN". Secondly, the note discusses the consequences of eliminating the L1 Trigger Sorter module located between the L1 trigger processing in the CPU farm and the TFC system. Two possible implementations are described: sorting the L1 triggers in the Readout Supervisor "ODIN" or handling unsorted L1 triggers fully. The two solutions require a redesign of the Readout Supervisor which implies a delay of about one year with respect to the current planning. However, the current version can still be used for tests and in the experiment provided a provisory L1 Trigger Sorted module exist.
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institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2003
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spelling cern-6844492019-09-30T06:29:59Zhttp://cds.cern.ch/record/684449engJacobsson, RImplementing the L1 trigger pathDetectors and Experimental TechniquesThis note discusses two issues which have emerged recently related to the transmission of data to the DAQ system by the L1 Front-End electronics and the implementation of the L1 trigger path. Firstly the note describes a scheme to centrally broadcast the IP destinations for the L1 data channel and the High-Level Trigger channel. The scheme is already supported by the TFC system, in particular by the current version of the Readout Supervisor "ODIN". Secondly, the note discusses the consequences of eliminating the L1 Trigger Sorter module located between the L1 trigger processing in the CPU farm and the TFC system. Two possible implementations are described: sorting the L1 triggers in the Readout Supervisor "ODIN" or handling unsorted L1 triggers fully. The two solutions require a redesign of the Readout Supervisor which implies a delay of about one year with respect to the current planning. However, the current version can still be used for tests and in the experiment provided a provisory L1 Trigger Sorted module exist.LHCb-2003-080oai:cds.cern.ch:6844492003-08-22
spellingShingle Detectors and Experimental Techniques
Jacobsson, R
Implementing the L1 trigger path
title Implementing the L1 trigger path
title_full Implementing the L1 trigger path
title_fullStr Implementing the L1 trigger path
title_full_unstemmed Implementing the L1 trigger path
title_short Implementing the L1 trigger path
title_sort implementing the l1 trigger path
topic Detectors and Experimental Techniques
url http://cds.cern.ch/record/684449
work_keys_str_mv AT jacobssonr implementingthel1triggerpath