Preliminary Exploratory Study of Different Phase II Collimators

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The Large Hadron Collider (LHC) collimation system is installed and commissioned in different phases, following the natural evolution of the LHC performance. To improve cleaning efficiency towards the end of the low beta squeeze at 7TeV, and in stable physics conditions, it is foreseen to complement the 30 highly robust Phase I secondary collimators with low impedance Phase II collimators. At this stage, their design is not yet finalized. Possible options include metallic collimators, graphite jaws with a movable metallic foil, or collimators with metallic rotating jaws. As part of the evaluation of the different designs, the FLUKA Monte Carlo ... continued below

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3 pages

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Lari, L.; Assmann, R.W.; Bertarelli, A.; Bracco, C.; Brugger, M.; Cerutti, F. et al. November 2, 2011.

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Description

The Large Hadron Collider (LHC) collimation system is installed and commissioned in different phases, following the natural evolution of the LHC performance. To improve cleaning efficiency towards the end of the low beta squeeze at 7TeV, and in stable physics conditions, it is foreseen to complement the 30 highly robust Phase I secondary collimators with low impedance Phase II collimators. At this stage, their design is not yet finalized. Possible options include metallic collimators, graphite jaws with a movable metallic foil, or collimators with metallic rotating jaws. As part of the evaluation of the different designs, the FLUKA Monte Carlo code is extensively used for calculating energy deposition and studying material damage and activation. This report outlines the simulation approach and defines the critical quantities involved.

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3 pages

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  • Journal Name: Conf.Proc.C0806233:wepp071,2008; Conference: EPAC'08, 11th European Particle Accelerator Conference, 23-27 June 2008, Genoa, Italy

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  • Report No.: SLAC-PUB-14668
  • Grant Number: AC02-76SF00515
  • Office of Scientific & Technical Information Report Number: 1028703
  • Archival Resource Key: ark:/67531/metadc843501

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  • November 2, 2011

Added to The UNT Digital Library

  • May 19, 2016, 3:16 p.m.

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  • Dec. 9, 2016, 8:20 p.m.

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Lari, L.; Assmann, R.W.; Bertarelli, A.; Bracco, C.; Brugger, M.; Cerutti, F. et al. Preliminary Exploratory Study of Different Phase II Collimators, article, November 2, 2011; United States. (digital.library.unt.edu/ark:/67531/metadc843501/: accessed August 17, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.