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    Spool piece misalignments

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

    6/R-018

    CERN

    20
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    *Tobias, spool piece misalignment.

    The polarity issue could be replied with references measuring polarities and the fact that coupling correction works well. Actually all MQS circuits were tested apparently to have the same polarity:

    https://cds.cern.ch/record/1667590/files/CERN-ACC-NOTE-2014-0012.pdf

    Nice MD proposal to remove MCS and main sextupoles -> Added to Twiki.

    -> Expand Twiki

     

    *Jacqueline, Momentum compaction factor

    Using arc+DS BPMs gives an excellent measurement of the 'visible' momentum compaction factor.

    This implies that the average horizontal BPM calibration in the arc is very good, <1%.

    Ask RF: Can we measure revolution frequency directly?

     

    *Michael, Action calculation

    Having some post-processing 

     

     

     

     

     

     

    There are minutes attached to this event. Show them.
      • 14:00 → 14:10
        Spool piece misalignment 10m
        Speaker: Tobias Hakan Bjorn Persson (CERN)
        mcsAlignmnetStudy.pdf
      • 14:10 → 14:20
        Measuring the momentum compaction factor 10m
        Speaker: Jacqueline Keintzel (Vienna University of Technology (AT))
        MomentumCompactionFactor.pdf
        MomentumCompactionFactor.pptx
      • 14:20 → 14:30
        Action-corrected from coupling measurement 10m
        Speaker: Michael Hofer (Vienna University of Technology (AT))
        ActionCalc.pdf
      • 14:30 → 14:50
        General: Wiki, MD notes, news, github, et 20m