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    HEB/ABT discussion

    → Europe/Zurich
    6/R-018 (CERN)

    6/R-018

    CERN

    20
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    HEB/ABT discussion
    Zoom Meeting ID
    67205305314
    Host
    Yann Dutheil
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    Present : A. Chance, B. Delena, Y. Dutheil, S. Kostoglou, P. Lersnimitthum, S. Yue
     
     
    • Booster layout
      • question of the survey
        • not presently available will be added by Antoine on the repo
        • Can be added easily by Antoine some time in the next few days (done here)
        • Sofia : the reference is for the IP is GHC
      • reviewing of the V24, with alcove for the generators 
      • for 26.2
        • booster line will cross collider, at 1m above
        • for V24, the approach was to remove dipoles and 
      • on 26,
        • the dipoles have the same field as in the arc 
        • do we have a limit on the dipole field max (GDR)
        • placement of the beamshtralung dump at 500m downstream the IP, integration show 5m width but height not known.
        • now 3 magnets per half-cell against 2 for V24
      • Question : can we shift the injection point more upstream ?
        • Other question is do we need to move the injection point upstream
        • Antoine estimates dropping dipoles at the start of the arc is possible.
        •  When we have the correct circumference : Antoine can try to fit the space needed for injection
        • Sofia will do the survey of the collider and Antoine the survey of the booster, Yann&Sen to share injection design requirements
      • Question : can the straight section length be increased ?
        • This is constrained by the offset at the IP and the arc offset to the collider.
        • Also follows the collider, and reference circumference
        • Could the start-of-arc dipole strength increased ? This is indeed one possibility
      • Question of the second straight ?
        • Another straight is present further downstream, around 1200m from the IP -> injection would be extended by about 400m
        • Advantage of being very far from the experiment
      • Next step
        • Sharing of the collider and Booster survey for V26, Antoine preparing this that evening
        • Antoine will make a commit on the injection repo for the injection
    • Beam Extraction and dump
      • Booster placement in the technical straight sections remain in question
      • Presently 26cm outside of the collider center
      • Cell length may change, but the same strategy as V24 should be applicable. Agreement to conduct a more detailed implementation once the booster optics and placement will be more fixed
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