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The CMS trigger system

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dc.abstract.enThis paper describes the CMS trigger system and its performance during Run 1 of the LHC.Thetriggersystemconsistsoftwolevelsdesignedtoselecteventsofpotentialphysicsinterest 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 thresholdsareadjustedtotheLHCinstantaneousluminosityduringdatatakinginordertorestrict the output rate to 100kHz, the upper limit imposed by the CMS readout electronics. The second level,implementedinsoftware,furtherrefinesthepurityoftheoutputstream,selectinganaverage rate of 400Hz for offline event storage. The objectives, strategy and performance of the trigger systemduringtheLHCRun1aredescribed.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorBuńkowski, Karol
dc.contributor.authorKalinowski, Artur
dc.contributor.authorBluj, Michal
dc.contributor.authorPoźniak, Krzysztof
dc.contributor.authorBrona, Grzegorz
dc.contributor.authorDoroba, Krzysztof
dc.contributor.authorKonecki, Marcin
dc.contributor.authorKazana, Malgorzata
dc.contributor.authorGórski, Maciej
dc.contributor.authorFrueboes, Tomasz
dc.contributor.authorBoimska, Bożena
dc.contributor.authorNawrocki, Krzysztof
dc.contributor.authorZalewski, Piotr
dc.contributor.authorSzleper, Michal
dc.contributor.authorRomanowska-Rybinska, Katarzyna
dc.contributor.authorMisiura, Maciej
dc.contributor.authorKrólikowski, Jan
dc.contributor.authorautorów, razem 2308
dc.contributor.authorByszuk, Adrian
dc.contributor.authorKhachatryan, Vardan
dc.contributor.authorWalczak, Marek
dc.contributor.authorBiałkowska, Helena
dc.contributor.authorOlszewski, Michał
dc.date.accessioned2024-01-26T10:09:11Z
dc.date.available2024-01-26T10:09:11Z
dc.date.issued2017
dc.description.financeNie dotyczy
dc.description.volume12
dc.identifier.doi10.1088/1748-0221/12/01/P01020
dc.identifier.issn1748-0221
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/122000
dc.languageeng
dc.pbn.affiliationphysical sciences
dc.relation.ispartofJournal of Instrumentation
dc.relation.pages1-118
dc.rightsClosedAccess
dc.sciencecloudnosend
dc.subject.enTriggerconceptsandsystems(hardwareandsoftware)
dc.subject.enTriggerdetectors
dc.subject.enDataacquisitioncircuits
dc.titleThe CMS trigger system
dc.typeJournalArticle
dspace.entity.typePublication