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    ESRF measurements

    → Europe/Zurich
    6/R-012 - conference room (CERN)

    6/R-012 - conference room

    CERN

    40
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    News:

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    90m, Tobias

    Talk was interesting to the audience. They requested betas and phase advances to the roman pots.

    Tobias and Andy take care of the request

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    Updates from teams in HSS, now OMC reports.

    -> OMC software as intagible asset -> Form to be filled Jaime & rogelio

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    MDs. Maybe 3 MDs!

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    Imbalance of lumi. We need K1 during K-modulation MDs. Issues with extraction of I and Ks.

    "Device extractor" did not work.  Jaime and Tobias follow this up.

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    Evian. correction policy talk, Andy

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    ESRF measurements, Lukas

    ORM data, TbT data, on- and off- momentum, versus amplitude. Great resolution: ~10mum.

    Groundbreaking news: Tune change versus s location!

    Simulation with single particle suggests that this is an FFT artifact for low number of turns.

    Low intensity.  Very low chroma for best TbT data.

    Maybe the analysis should be done for the same tune for all BPMs.

    Differences Vs number of turns.

    Clear non-linear beta function with amplitude.

    ORM looks more like beta from amplitude!

    rms difference from phase and rms is about 1% ?

    What is best measurement from phase or from amplitude?

    This is the first time phase measurement has systematic errros.

    Coupling to be checked.

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    Piotr, jumping orbit

    IR8 clearly identified!

    The projection into dispersion  is unclear, points to an energy error but small ~ 10Hz.

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    Ana, Beta from amplitude

    effect of correction?

    Clear signature of 10% miscalibration of BPMs.

    Some bug in the model. to be checked.

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