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Compact Muon Solenoid
LHC, CERN

CMS-CFT-09-013 ; _CERN_ID_
Performance of the CMS Level-1 Trigger during Commissioning with Cosmic Ray Muons and LHC beams
J. Instrum. 5 (2010) T03002
Abstract: The CMS Level-1 trigger was used to select cosmic ray muons and LHC beam events during data-taking runs in 2008, and to estimate the level of detector noise. This paper describes the trigger components used, the algorithms that were executed, and the trigger synchronisation. Using data from extended cosmic ray runs, the muon, electron/photon, and jet triggers have been validated, and their performance evaluated. Efficiencies were found to be high, resolutions were found to be good, and rates as expected.
CMS Publications
Compact Muon Solenoid
LHC, CERN