Journal article
The CMS trigger system
Journal of instrumentation, Vol.12(1), P01020
2017
DOI: 10.1088/1748-0221/12/01/P01020
Abstract
This paper describes the CMS trigger system and its performance during Run 1 of the LHC. The trigger system consists of two levels designed to select events of potential physics interest from a GHz (MHz) interaction rate of proton-proton (heavy ion) collisions. The first level of the trigger is implemented in hardware, and selects events containing detector signals consistent with an electron, photon, muon, τ lepton, jet, or missing transverse energy. A programmable menu of up to 128 object-based algorithms is used to select events for subsequent processing. The trigger thresholds are adjusted to the LHC instantaneous luminosity during data taking in order to restrict the output rate to 100 kHz, the upper limit imposed by the CMS readout electronics. The second level, implemented in software, further refines the purity of the output stream, selecting an average rate of 400 Hz for offline event storage. The objectives, strategy and performance of the trigger system during the LHC Run 1 are described.
Details
- Title: Subtitle
- The CMS trigger system
- Creators
- Maria Florencia CanelliBenjamin KilminsterThea K AarrestadLea CaminadaAnnapaoloa De CosaRiccardo Del BurgoSilvio DonatoCamilla GalloniAndreas HinzmannTomas HreusJennifer NgadiubaDeborah PinnaGiorgia RaucoPeter RobmannDaniel SalernoKorbinian SchweigerClaudia SeitzYuta TakahashiAlberto ZucchettaYasar Onel (Contributor) - Physics and AstronomyCMS Collaboration
- Resource Type
- Journal article
- Publication Details
- Journal of instrumentation, Vol.12(1), P01020
- DOI
- 10.1088/1748-0221/12/01/P01020
- ISSN
- 1748-0221
- eISSN
- 1748-0221
- Publisher
- IOP Publishing
- Language
- English
- Date published
- 2017
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984428817302771
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