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    Before Evian

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

    6/R-018

    CERN

    20
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    Leon, issues with K-modulation in VdM optics measurements.

    The angle is not considered in the equations, X'ma could be considered using the transfer matrix of a quad.

    Doing SVD should improve resolution.

    Measured DQs should be compared to model DQs.

    Error in beta* comes actually from limitation on the equations of k-mod!!! There is a bifurcation exactly at beta*~L*!

    Beta* should be computed from AC dipole.

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    Elena, GUI, tests, etc

    HL-LHC added to the GUI. 

    K-mod GUI has new buttom can extract previous trim for any quad now.

    Autoclean is now a proposal.

    K-mod points in GUI should be in different color.

    Tobias should instruct Elena to store coupling corrections and trim.

    Drive is the bottleneck:

    - Maybe reduce number of BPMs (to be tested), or less turns. Tobias prefers reducing number of BPMs.

    - Is python FFT faster

    Problems: Integer part of tunes wrong in OM, Jorg proposed a new variable from LSA. To be fixed in January.

    Andreas asks to put JARC in GUI - > Elena

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    Tobias, Evian presentaion

    Coupling stability, automatic coupling correction, etc.

     

    ####################

    Ewen

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    Andreas

     

     

     

     

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