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Getting ready for the squeeze
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6/R-012 - conference room (CERN)
Tobias, Chromatic coupling
Hiccup with tracking offmomentum. To avoid this in the future a test should be put in the GUI.
ACTION-> Tobias & Jaime prepare tracking test for chromatic coupling
Current test very succesful and it was done without changing driving frequency with change of natural tunes due to chromaticy. Problem fixed!
Checking the problem of the needed 3 iterations the conclusion is that we did not need to iterate! We failed to see it on-line. Actually, prediction looks a bit worse that actual measurement, maybe ok.
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How to keep GUI actions:
Piotr suggest Wiki-> Wiki started! -> Jaime needs to find a better place
ACTION -> Lukas decides best injection measurement
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Lukas had a look into the error bars in the IR8 and they impoved thanks to removing b2 errors. Andy says you cannot untick b2 systematic errors. What happens
But the analysis should be redone.
ACTION-> Andy, Jaime, What to do with/withou b2 and systematic errors?
Lukas checked what happens when including corrections in segment-by-segment, analysis to be continued.
The effect of the corrections on the beta function should be evaluated to go twoards a best knowledge model.
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Andy, flattop, comparsion to 4 TeV
The new model in 2015 did not change significantly the results (only in IR4).
->LHCB2 has more errors than LHCB1!!! -> we can find them with segment-by-segment -> Clear errors in IR5, 6 & 8. -> Ewen and Felix, Piotr, Lukas...
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