Trigger Data Quality Monitoring in the Cms Experiment

Details Trigger Data Quality Monitoring in the Cms Experiment Trigger Data Quality Monitoring in the Cms Experiment

Apr 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010apsp.conf..411a&link_type=abstract

ASTROPARTICLE, PARTICLE AND SPACE PHYSICS, DETECTORS AND MEDICAL PHYSICS APPLICATIONS. Proceedings of the 11th Conference. Held

Physics

Medical Physics

Scientific paper

The two-level trigger system of the CMS experiment consists of a Level-1 (L1) and a high level trigger (HLT) components. The Level-1 system processes data from the calorimeters and from the muon systems and can cope with 40MHz of collision rate expected from LHC operation. The second component, the High Level Trigger, is based on software running on a farm of several thousands commercial CPUs. The High Level Trigger is designed to process the events accepted by the Level-1 trigger at a rate of 100kHz and to further reduce the events which are considered interesting for physics analysis to about 100Hz. To exploit the full CMS potential it is imperative to devise a strategy for monitoring the performance of trigger system both at Level-1 and at the HLT and ensure that high quality data is collected and stored. This paper describes how this goal is achieved in CMS.

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