Author: Molson, J.
Paper Title Page
TUPMR054 Simulation of the FCC-hh Collimation System 1381
 
  • J. Molson, P. Bambade, S. Chancé, A. Faus-Golfe
    LAL, Orsay, France
 
  Funding: Funding from the European Union's Horizon 2020 research and innovation programme under grant No 654305. Funding also from ANR-11-IDEX-0003-02.
The proposed CERN FCC-hh proton-proton collider will operate at unprecedented per-particle (50 TeV) and total stored beam energies (8.4 GJ). These high energies create the requirement for an efficient collimation system in order to protect the accelerator components and experiments. In order to verify the performance of proposed collimation system designs, loss map simulations have been performed using the code Merlin. Results for the current baseline layout are presented for both betatron and off-momentum loss maps.
 
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-TUPMR054  
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WEPMW036 MERLIN Cleaning Studies with Advanced Collimator Materials for HL-LHC 2514
 
  • A. Valloni, R. Bruce, A. Mereghetti, E. Quaranta, S. Redaelli
    CERN, Geneva, Switzerland
  • R.B. Appleby
    UMAN, Manchester, United Kingdom
  • J. Molson
    LAL, Orsay, France
  • H. Rafique
    University of Huddersfield, Huddersfield, United Kingdom
 
  The challenges of the High-Luminosity upgrade of the Large Hadron Collider require improving the beam collimation system. An intense R&D program has started at CERN to explore novel materials for new collimator jaws to improve robustness and reduce impedance. Particle tracking simulations of collimation efficiency are performed using the code MERLIN which has been extended to include new materials based on composites. After presenting two different implementations of composite materials tested in MERLIN, we present simulation studies with the aim of studying the effect of the advanced collimators on the LHC beam cleaning.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-WEPMW036  
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WEPMW037 MERLIN Simulations of the LHC Collimation System with 6.5 TeV Beams 2518
 
  • A. Valloni
    Rome University La Sapienza, Roma, Italy
  • R.B. Appleby, S.C. Tygier
    UMAN, Manchester, United Kingdom
  • R. Bruce, A. Mereghetti, S. Redaelli
    CERN, Geneva, Switzerland
  • J. Molson
    LAL, Orsay, France
  • H. Rafique
    University of Huddersfield, Huddersfield, United Kingdom
 
  The accelerator physics code MERLIN has been extended in many areas to make detailed studies of the LHC collima- tion system and calculate loss maps from beam halo losses. Large scale tracking simulations have been produced for the 2015 run configuration at 6.5 TeV. We present results of cleaning inefficiency simulations of the LHC's multi-stage collimation system along with a detailed comparison be- tween MERLIN, SixTrack, and measured beam losses.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-WEPMW037  
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