Beam Losses and Background Loads on Collider Detectors Due to Beam-Gas Interactions in the LHC

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With a fully-operational high-efficient collimation system in the LHC, nuclear interactions of circulating protons with residual gas in the machine beam pipe can be a major source of beam losses in the vicinity of the collider detectors, responsible for the machine-induced backgrounds. Realistic modeling of Coulomb scattering, elastic and inelastic interactions of 7-TeV protons with nuclei in the vacuum chamber of the cold and warm sections of the LHC ring--with an appropriate pressure profile--is performed with the STRUCT and MARS15 codes. Multi-turn tracking of the primary beams, propagation of secondaries through the lattice, their interception by the tertiary collimators TCT ... continued below

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4 pages

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Drozhdin, A.I.; Mokhov, N.V.; Striganov, S.I. & /Fermilab April 1, 2009.

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With a fully-operational high-efficient collimation system in the LHC, nuclear interactions of circulating protons with residual gas in the machine beam pipe can be a major source of beam losses in the vicinity of the collider detectors, responsible for the machine-induced backgrounds. Realistic modeling of Coulomb scattering, elastic and inelastic interactions of 7-TeV protons with nuclei in the vacuum chamber of the cold and warm sections of the LHC ring--with an appropriate pressure profile--is performed with the STRUCT and MARS15 codes. Multi-turn tracking of the primary beams, propagation of secondaries through the lattice, their interception by the tertiary collimators TCT as well as properties of corresponding particle distributions at the CMS and ATLAS detectors are studied in great detail and results presented in this paper.

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4 pages

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  • Presented at Particle Accelerator Conference (PAC 09), Vancouver, BC, Canada, 4-8 May 2009

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  • Report No.: FERMILAB-CONF-09-172-APC
  • Grant Number: AC02-07CH11359
  • Office of Scientific & Technical Information Report Number: 952273
  • Archival Resource Key: ark:/67531/metadc935212

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  • April 1, 2009

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  • Nov. 13, 2016, 7:26 p.m.

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  • Dec. 6, 2016, 7:31 p.m.

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Drozhdin, A.I.; Mokhov, N.V.; Striganov, S.I. & /Fermilab. Beam Losses and Background Loads on Collider Detectors Due to Beam-Gas Interactions in the LHC, article, April 1, 2009; Batavia, Illinois. (digital.library.unt.edu/ark:/67531/metadc935212/: accessed November 19, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.