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Preparation of OMC-OP workshop
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Europe/Zurich
6/2-004 (CERN)
Tobias, OP-OMC workshop
Piotr asks about extending the workshop to injectors, to be followed up.
To be presented in HSS.
Obvious candidates are Stefano, Roderik and Nuria for the collimation presentation.
Move "aperture meter" to collimation and Jorg's talk.
Multiple bunch measurements to be added to Lukas' talk (RF phase modulation inside multiturn???)
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Hector, Van der Meer optics revisited
The absence of BPM data in CASTOR LHC directory is probably due to the fact that they are backing this up in the SPS directory.
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Ewen, non-linear correction review
Wise 2011 vs wise 2015 have clear discrepancies. Inform Ezio before WP2 about the a3 2011-2015 discrepancies.
Current HL tolerance is +-1mm for non-linear correctors, possibility to review it? Check with Massimo.
IR2 sext correction did not work in 2018 ! Various hiccaps in the commissioning.
Present sum of a4 L/R correctors in IR1. Typo IR1 -> IP5
Explanation of b4 discrepancy should not be linked to the crossing angle feeddown.
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Lukas, SVD cleaning revisited
svd cut of 0.9 on single BPM is usually used. In Injectors this might remove too many BPMs.
Are noise signal coming from creates? Not yet found since single BPMs were still dominating.
SVD dominance limit should be set to ~ 0.7... but should we remove BPM or just mode?
Shall we weight this with the svd value??? Since we might be cutting a BPM with still good amount of signal.
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