Journal
JOURNAL OF INSTRUMENTATION
Volume 5, Issue -, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1748-0221/5/03/T03002
Keywords
Trigger concepts and systems (hardware and software); Trigger algorithms
Categories
Funding
- FMSR (Austria)
- FNRS and FWO (Belgium)
- CNPq
- CAPES
- FAPERJ
- FAPESP (Brazil)
- MES (Bulgaria)
- CERN
- CAS
- MoST
- NSFC (China)
- COLCIENCIAS (Colombia)
- MSES (Croatia)
- RPF (Cyprus)
- Academy of Sciences
- NICPB (Estonia)
- Academy of Finland
- ME
- HIP (Finland)
- CEA
- CNRS/IN2P3 (France)
- BMBF
- DFG
- HGF (Germany)
- GSRT (Greece)
- OTKA and NKTH (Hungary)
- DAE and DST (India)
- IPM (Iran)
- SFI (Ireland)
- INFN (Italy)
- NRF (Korea)
- LAS (Lithuania)
- CINVESTAV
- CONACYT
- SEP
- UASLP-FAI (Mexico)
- PAEC (Pakistan)
- SCSR (Poland)
- FCT (Portugal)
- JINR (Armenia, Belarus, Georgia, Ukraine, Uzbekistan)
- MST and MAE (Russia)
- MSTDS (Serbia)
- MICINN and CPAN (Spain)
- Swiss Funding Agencies (Switzerland)
- NSC (Taipei)
- TUBITAK
- TAEK (Turkey)
- STFC (United Kingdom)
- DOE and NSF (USA)
- European Union
- Leventis Foundation
- A. P. Sloan Foundation
- Alexander von Humboldt Foundation
- Direct For Mathematical & Physical Scien
- Division Of Physics [0757894] Funding Source: National Science Foundation
- Science and Technology Facilities Council [PP/D004284/1, ST/F006748/1, CMS, ST/G502347/1, ST/H000992/1, GRIDPP, ST/G502412/1, ST/I002839/1, ST/I000410/1, PP/E002722/1, ST/I002200/1] Funding Source: researchfish
- STFC [ST/I002200/1, PP/E002722/1, ST/G502412/1, ST/I002839/1, ST/I000410/1, ST/F006748/1, ST/H000992/1, ST/G502347/1] Funding Source: UKRI
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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.
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