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    FCC-ee top-up injection

    → Europe/Zurich
    FCC-ee top-up injection
    Zoom Meeting ID
    66156014911
    Host
    Yann Dutheil
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    • Lattice comparison report
      • Question of the effect of errors which should be taken into account and used to drive improvement of the lattice
      • ABP plans to add effect of errors and beam-beam on the tuning section
      • Say in the injection region that they perform OK but as shown in the BB and tuning section the DA and MA are lower which is critical
    • Top-up injection
      • Using Xutil tuning and setup tools
      • LCC V105 showed low MA but results shown are not representative, explained by vertical dispersion -> much better with V106
      • Xutil is not the source of the lattices, but only for the manipulations
      • Xutil also has DA/MA implemented, presented simulations here are using more angles which may be the source of differences
      • Results presented do not form a consensus and present some incoherences, therefore the slides will not be public
    • Injection orbit bump study
      • Influence of orbit bump on injection efficiency is minimal
      • Injection orbit bump is integrated into Xutil
      • Question of longitudinal parameters
    • Discussion on the injection settings
      • Injection settings are extensively discussed, single source should be discussed
      • Need to properly dimension the bump amplitude and the chamber size
      • Collimations gaps are at 8-9.5 sigma in H and 1.1-1.3 % in momentum for GHC and LCC
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