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Comparison between simulated and observed LHC beam backgrounds in the ATLAS experiment at E-beam=4 TeV
Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
Stockholm University, Faculty of Science, Department of Physics.
Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
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Number of Authors: 28832018 (English)In: Journal of Instrumentation, ISSN 1748-0221, E-ISSN 1748-0221, Vol. 13, article id P12006Article in journal (Refereed) Published
Abstract [en]

Results of dedicated Monte Carlo simulations of beam-induced background (BIB) in the ATLAS experiment at the Large Hadron Collider (LHC) are presented and compared with data recorded in 2012. During normal physics operation this background arises mainly from scattering of the 4 TeV protons on residual gas in the beam pipe. Methods of reconstructing the BIB signals in the ATLAS detector, developed and implemented in the simulation chain based on the FLUKA Monte Carlo simulation package, are described. The interaction rates are determined from the residual gas pressure distribution in the LHC ring in order to set an absolute scale on the predicted rates of BIB so that they can be compared quantitatively with data. Through these comparisons the origins of the BIB leading to different observables in the ATLAS detectors are analysed. The level of agreement between simulation results and BIB measurements by ATLAS in 2012 demonstrates that a good understanding of the origin of BIB has been reached.

Place, publisher, year, edition, pages
2018. Vol. 13, article id P12006
Keywords [en]
Accelerator modelling and simulations (multi-particle dynamics, single-particle dynamics), Radiation calculations, Simulation methods and programs
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:su:diva-163591DOI: 10.1088/1748-0221/13/12/P12006ISI: 000452068100002OAI: oai:DiVA.org:su-163591DiVA, id: diva2:1277947
Available from: 2019-01-11 Created: 2019-01-11 Last updated: 2019-12-10Bibliographically approved

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Bertoli, GabrieleBessidskaia Bylund, OlgaBohm, ChristianCarney, Rebecca M. D.Clement, ChristopheGellerstedt, KarlHellman, StenJon-And, KerstinMilstead, David A.Moa, TorbjörnMolander, SimonPasuwan, PatrawanShaikh, Nabila W.Silverstein, Samuel B.Sjölin, JörgenStrandberg, SaraUghetto, MichaëlSanturio, E. ValdesWallängen, Veronica
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Department of PhysicsThe Oskar Klein Centre for Cosmo Particle Physics (OKC)
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