High Level Trigger Configuration and Handling of Trigger Tables in the CMS Filter Farm
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.
- Research Organization:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 978403
- Report Number(s):
- LLNL-PROC-420704; TRN: US1002973
- Resource Relation:
- Journal Volume: 119; Journal Issue: 2; Conference: Presented at: International Conference on Computing in High Energy and Nuclear Physics, Victoria, Canada, Sep 02 - Sep 07, 2007
- Country of Publication:
- United States
- Language:
- English
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