High level trigger configuration and handling of trigger tables in the CMS filter farm

Gerry Bauer, Ulf Behrens, Vincent Boyer, James Branson, Angela Brett, Eric Cano, Andrea Carboni, Marek Ciganek, Sergio Cittolin, Vivian O'dell, Samim Erhan, Dominique Gigi, Frank Glege, Robert Gomez-Reino, Michele Gulmini, Johannes Gutleber, Jonathan Hollar, David Lange, Jin Cheol Kim, Markus KluteElliot Lipeles, Juan Antonio Lopez Perez, Gaetano Maron, Frans Meijers, Emilio Meschi, Roland Moser, Esteban Gutierrez Mlot, Steven Murray, Alexander Oh, Luciano Orsini, Christoph Paus, Andrea Petrucci, Marco Pieri, Lucien Pollet, Attila Racz, Hannes Sakulin, Matteo Sani, Philipp Schieferdecker, Christoph Schwick, Konstanty Sumorok, Ichiro Suzuki, Dimitrios Tsirigkas, Joao Varela

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


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.

Original languageEnglish (US)
Pages (from-to)22011
Number of pages1
JournalJournal of Physics: Conference Series
Issue number2
StatePublished - Jul 1 2008
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


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