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Europe/Zurich
6/2-008 (CERN)
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Andreas, N-BPM method for ATS
a bug was fixed concerning error bar calculation.
Peak beta-beating for 10cm ATS MD is now ~30% in Beam1.
Simulations of HL-LHC N-BPM analytical shows better performance than 3BPM.
-> Investigation on required kick amplitude for ATS optics
AC dipole systematic correction-> to be checked which is the right formula
ADT formula method to be implemented and GUI to be adapted.
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Ewen, On-line model needs for IR non-linearities
discussed with Tobias, on-line model has knob extraction (tested). From knob components one can look-up
currents in Timber to define platteaus. This has two ways:
-visual interface
-automatic tool with pre-defined flatness definition
-What about AC dipole tune change?
Automatic is the only way but we need to know AC dipole kicks. And what about manual orbit correction?
Piotr also suggests manual selection of ranges with guesses.
>Goal: Minimal GUI in python that displays a scan and guesses platteaus taking into AC dipole and orbit correction. Who contributes to this? -> Ewen with help from Felix, Piotr, Lukas.
Issue with on-line model at matching extracted orbit. To be checked by On-line model.
Automatically generating a model, optics, only IR errors, thin model.
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Piotr, On-line model plans
-Publish ESRF paper!
-test suite
-Orbit matching robustness
-tool for knob scanning and ploting model versus measurement
-> Piotr will find out when knobs are active
ATS: There is a variable called ARC_SQUEEZE in madx that says where we are, pre-squeeze, squeeze!
Java replacement for WISE misalignments. Magnetic errors
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Jaime, Elena, Orbit extractioni for K-modulation
Orbit maybe only needed only in the arcs but let's be general. On-line model could be used, so flags are taken into account.
Putting crossing angles in our analysis, what does it mean?
crossing angle needs to change, use new convention, via on-line model, entry... (same phylosophy as MQTs).
Not in SbS!!! only for global corrections, dispersion measurement.
Non-linearities are not needed.
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Michael, K-modulat in IR4
still with maximum and minimum tunes, but rms to be implemented.
Current output beta waist and waist. Next output will be betas at BPMs.
Michael and Jaime to sit together for 10min to clarify GUI-python communication.
Systematic errors should be added.
K-mod gui needs model.
Split quads implented, tests on-going.
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Tobias, coupling changes.
we predict a change of the coupling from triplet movements of about few 0.001.
1st target is safe beams.
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Ana, BPM calibration
turn shifter was implemented in SVD clean. This is probably needed but needs good implementation and TEST TEST TEST!
->Update k uncertainty in SbS propagation.
Manual calculation of IP5 beta*.
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