Commissioning of the CMS High-Level Trigger with cosmic rays
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The CMS High-Level Trigger (HLT) is responsible for ensuring that data samples with potentially interesting events are recorded with high efficiency and good quality. This paper gives an overview of the HLT and focuses on its commissioning using cosmic rays. The selection of triggers that were deployed is presented and the online grouping of triggered events into streams and primary datasets is discussed. Tools for online and offline data quality monitoring for the HLT are described, and the operational performance of the muon HLT algorithms is reviewed. The average time taken for the HLT selection and its dependence on detector and operating conditions are presented. The HLT performed reliably and helped provide a large dataset. This dataset has proven to be invaluable for understanding the performance of the trigger and the CMS experiment as a whole.
Кључне речи:Trigger concepts and systems (hardware and software) / Online farms and online filtering
Извор:Journal of Instrumentation, 2010, 5
- 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 and NICPB (Estonia), Academy of Finland, ME, HIP (Finland), CEA and CNRS/IN2P3 (France), BMBF, Germany, 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 and TAEK (Turkey), STFC (United Kingdom), DOE and NSF (USA), European Union, Leventis Foundation, A.P. Sloan Foundation, Alexander von Humboldt Foundation