High Level Trigger Configuration and Handling of Trigger Tables in the CMS Filter Farm

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The CMS experiment at the CERN Large Hadron Collider is currently being commissioned and is scheduled to collect the first pp collision data in 2008. CMS features a two-level trigger system. The Level-1 trigger, based on custom hardware, is designed to reduce the collision rate of 40 MHz to approximately 100 kHz. Data for events accepted by the Level-1 trigger are read out and assembled by an Event Builder. The High Level Trigger (HLT) employs a set of sophisticated software algorithms, to analyze the complete event information, and further reduce the accepted event rate for permanent storage and analysis. This ... continued below

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Bauer, G; Behrens, U; Boyer, V; Branson, J; Brett, A; Cano, E et al. November 22, 2009.

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The CMS experiment at the CERN Large Hadron Collider is currently being commissioned and is scheduled to collect the first pp collision data in 2008. CMS features a two-level trigger system. The Level-1 trigger, based on custom hardware, is designed to reduce the collision rate of 40 MHz to approximately 100 kHz. Data for events accepted by the Level-1 trigger are read out and assembled by an Event Builder. The High Level Trigger (HLT) employs a set of sophisticated software algorithms, to analyze the complete event information, and further reduce the accepted event rate for permanent storage and analysis. This paper describes the design and implementation of the HLT Configuration Management system. First experiences with commissioning of the HLT system are also reported.

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PDF-file: 11 pages; size: 1 Mbytes

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  • Presented at: International Conference on Computing in High Energy and Nuclear Physics, Victoria, Canada, Sep 02 - Sep 07, 2007

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  • Report No.: LLNL-PROC-420704
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 978403
  • Archival Resource Key: ark:/67531/metadc926851

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  • November 22, 2009

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  • Nov. 13, 2016, 7:26 p.m.

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  • Nov. 29, 2016, 12:35 p.m.

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Bauer, G; Behrens, U; Boyer, V; Branson, J; Brett, A; Cano, E et al. High Level Trigger Configuration and Handling of Trigger Tables in the CMS Filter Farm, article, November 22, 2009; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc926851/: accessed September 23, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.