Beam-induced and cosmic-ray backgrounds observed in the ATLAS detector during the LHC 2012 proton-proton running period

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dc.WoS.categoriesInstruments & Instrumentationen_US
dc.authorid0000-0001-5050-8441en_US
dc.contributor.authorÇetin, Serkant Ali
dc.date.accessioned2020-12-10T07:33:02Z
dc.date.available2020-12-10T07:33:02Z
dc.date.issued2016-05
dc.departmentFakülteler, Mühendislik ve Doğa Bilimleri Fakültesi, Enerji Sistemleri Mühendisliği Bölümüen_US
dc.description.abstractThis paper discusses various observations on beam-induced and cosmic-ray backgrounds in the ATLAS detector during the LHC 2012 proton-proton run. Building on published results based on 2011 data, the correlations between background and residual pressure of the beam vacuum are revisited. Ghost charge evolution over 2012 and its role for backgrounds are evaluated. New methods to monitor ghost charge with beam-gas rates are presented and observations of LHC abort gap population by ghost charge are discussed in detail. Fake jets from colliding bunches and from ghost charge are analysed with improved methods, showing that ghost charge in individual radio-frequency buckets of the LHC can be resolved. Some results of two short periods of dedicated cosmic-ray background data-taking are shown; in particular cosmic-ray muon induced fake jet rates are compared to Monte Carlo simulations and to the fake jet rates from beam background. A thorough analysis of a particular LHC fill, where abnormally high background was observed, is presented. Correlations between backgrounds and beam intensity losses in special fills with very high beta* are studied.en_US
dc.fullTextLevelFull Texten_US
dc.identifier.doi10.1088/1748-0221/11/05/P05013
dc.identifier.issn1748-0221
dc.identifier.scopus2-s2.0-85009065117en_US
dc.identifier.urihttps://hdl.handle.net/11411/2822
dc.identifier.urihttps://doi.org/10.1088/1748-0221/11/05/P05013
dc.identifier.wosWOS:000377851700036en_US
dc.identifier.wosqualityQ3en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.nationalInternationalen_US
dc.numberofauthors100+en_US
dc.publisherIop Publishing Ltden_US
dc.relation.ispartofJournal Of Instrumentationen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectBeam-line instrumentationen_US
dc.subjectbunch length monitorsen_US
dc.subjectbeam-intensity monitorsen_US
dc.subjectbeam position and profile monitorsen_US
dc.subjectData analysisen_US
dc.subjectPerformance of High Energy Physics Detectorsen_US
dc.titleBeam-induced and cosmic-ray backgrounds observed in the ATLAS detector during the LHC 2012 proton-proton running period
dc.typeArticle
dc.volume11en_US

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