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    Summer progress

    → Europe/Zurich
    6/2-008 (CERN)

    6/2-008

    CERN

    15
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    ###  Elena, ML corrections with individual quads

    Single quadrupoles are rather well predicted by ML !!

    -> keep making simulations more realistic until full success (MQX extra errors, 2 beams, sext misalignments)

    ### Leon, Roll errors in coupling RDTs

    Expressions for perturbed RDTs already being used in simulations. Comparison between x and y phases could be used to measure BPM rotations.

    SVD clean removes individual BPMs with  tilts -> Increase tolerance in getllm between H and V phases or add coupling to the machine.

    ### Phase-advance constraint on kmod

    So far the input phased used is the ideal model. In reality the measured phase from AC dipole should be used.

    Need to compare to true beta* and waist

     

    ###  Frederik, LHC and HL-LHC amp det with offset corrs

    Some strange structure in the beta-beating distributions...

    HL-LHC twiss with coupling was failing for missing coupling knobs.

     

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