Author: Jackson, S.
Paper Title Page
WEPMW007 Validation of Off-momentum Cleaning Performance of the LHC Collimation System 2427
  • B. Salvachua, P. Baudrenghien, R. Bruce, H. Garcia, P.D. Hermes, S. Jackson, M. Jaussi, A. Mereghetti, D. Mirarchi, S. Redaelli, H. Timko, G. Valentino, A. Valloni
    CERN, Geneva, Switzerland
  • R. Kwee-Hinzmann
    Royal Holloway, University of London, Surrey, United Kingdom
  The LHC collimation system is designed to provide effective cleaning against losses coming from off-momentum particles, either due to un-captured beam or to an unexpected RF frequency change. For this reason the LHC is equipped with a hierarchy of collimators in IR3: primary, secondary and absorber collimators. After every collimator alignment or change of machine configuration the off-momentum cleaning efficiency is validated with loss maps at low intensity. We describe here the improved technique used in 2015 to generate such loss maps without completely dumping the beam into the collimators. The achieved performance of the collimation system for momentum cleaning is reviewed.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-WEPMW007  
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