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The CMS trigger system

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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. © CERN 2017 for the benefit of the CMS collaboration..

Anahtar Kelimeler

Data acquisition circuitsTrigger concepts and systems (hardware and software)Trigger detectorsColliding beam acceleratorsData acquisitionHeavy ionsTiming circuitsTrigger circuitsData acquisition circuitHardware and softwareHeavy-ion collisionsInteraction ratePerformanceSystem hardwareSystem softwaresTrigger concept and system (hardware and software)Trigger detectorTrigger systemsDigital storage
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AlanDeğerDil
dc.contributor.authorKhachatryan, V.
dc.contributor.authorSirunyan, A.M.
dc.contributor.authorTumasyan, A.
dc.contributor.authorAdam, W.
dc.contributor.authorAsilar, E.
dc.contributor.authorBergauer, T.
dc.contributor.authorBrandstetter, J.
dc.contributor.authorBrondolin, E.
dc.contributor.authorDragicevic, M.
dc.contributor.authorErö, J.
dc.contributor.authorFlechl, M.
dc.contributor.authorFriedl, M.
dc.contributor.authorFrühwirth, R.
dc.contributor.authorGhete, V.M.
dc.contributor.authorHartl, C.
dc.contributor.authorHörmann, N.
dc.contributor.authorHrubec, J.
dc.contributor.authorJeitler, M.
dc.contributor.authorKnünz, V.
dc.contributor.authorKönig, A.
dc.contributor.authorKrammer, M.
dc.contributor.authorKrätschmer, I.
dc.contributor.authorLiko, D.
dc.contributor.authorMatsushita, T.
dc.contributor.authorMikulec, I.
dc.contributor.authorRabady, D.
dc.contributor.authorRahbaran, B.
dc.contributor.authorRohringer, H.
dc.contributor.authorSchieck, J.
dc.contributor.authorSchöfbeck, R.
dc.contributor.authorStrauss, J.
dc.contributor.authorTreberer-Treberspurg, W.
dc.contributor.authorWaltenberger, W.
dc.contributor.authorWulz, C.-E.
dc.contributor.authorMossolov, V.
dc.contributor.authorShumeiko, N.
dc.contributor.authorGonzalez, J. Suarez
dc.contributor.authorAlderweireldt, S.
dc.contributor.authorCornelis, T.
dc.contributor.authorDe Wolf, E.A.
dc.contributor.authorJanssen, X.
dc.contributor.authorKnutsson, A.
dc.contributor.authorLauwers, J.
dc.contributor.authorLuyckx, S.
dc.contributor.authorVan De Klundert, M.
dc.contributor.authorVan Haevermaet, H.
dc.contributor.authorVan Mechelen, P.
dc.contributor.authorVan Remortel, N.
dc.contributor.authorVan Spilbeeck, A.
dc.contributor.authorZeid, S. Abu
dc.date.accessioned2026-10-18T20:29:32.290201564Z
dc.date.available2026-10-18T20:29:32.290201564Z
dc.date.issued2017
dc.description.abstractThis 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. © CERN 2017 for the benefit of the CMS collaboration..
dc.description.sponsorshipNational Science Foundation, NSF, (1606321, 1151640, 1506130, 1211067, 1506168, 1508869, 1624356); National Science Foundation, NSF; Science and Technology Facilities Council, STFC, (GRIDPP, CMS, ST/N000250/1, ST/K001256/1); Science and Technology Facilities Council, STFC
dc.identifier.doi10.1088/1748-0221/12/01/p01020
dc.identifier.issn1748-0221
dc.identifier.issue1
dc.identifier.scopus2-s2.0-85012113428
dc.identifier.startpageP01020
dc.identifier.urihttps://rdlopen.rawdatalibrary.net/r/ebyu/14728
dc.identifier.volume12
dc.language.isoen
dc.publisherInstitute of Physics
dc.relation.ispartofJournal of Instrumentation
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subjectData acquisition circuits
dc.subjectTrigger concepts and systems (hardware and software)
dc.subjectTrigger detectors
dc.subjectColliding beam accelerators
dc.subjectData acquisition
dc.subjectHeavy ions
dc.subjectTiming circuits
dc.subjectTrigger circuits
dc.subjectData acquisition circuit
dc.subjectHardware and software
dc.subjectHeavy-ion collisions
dc.subjectInteraction rate
dc.subjectPerformance
dc.subjectSystem hardware
dc.subjectSystem softwares
dc.subjectTrigger concept and system (hardware and software)
dc.subjectTrigger detector
dc.subjectTrigger systems
dc.subjectDigital storage
dc.titleThe CMS trigger system
dc.typeArticle
dspace.entity.typePublication
rdl.citation.scopus603
rdl.oa.statusgold
rdl.source.indexSCOPUS