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Calibration Statistics

Calibrations from 29/11/2011-06/12/2011

scale06.png iqra06.png

Calibrations to be Cut or Repeated

Have to be careful about making cuts, because in some cases, they are the only calibrations of those BPMs this week. However, even single cuts can remove several outliers because they skew the mean by so much.

BPM File Reason
1 QD8FFx bpmAllMoverCalibration_20111129_045538.dat (1st) Anomalous mover readout causes a lot of problems
2 QD8FFx bpmAllMoverCalibration_20111206_040409.dat (4th) Two anomalous mover readouts
3 QF7FFx 1st,2nd insensitive possibly due to blown electronics
4 QF7FFy 1st,2nd "
5 QD10BFFx bpmAllMoverCalibration_20111206_032649.dat (3rd) A couple of anomalous mover readouts at the beginning
6 QM11FFx bpmAllMoverCalibration_20111206_024405.dat (5th) Big beam move in middle
7 QD10AFFy bpmAllMoverCalibration_20111206_030731.dat (3rd) Jitter subtraction didn't work really, very noisy
8 QD2AFFy 20111129_070329 20111206_061800 (1st,2nd) Both calibrations had an anomalous mover readout

Histograms with all the cuts above except for the last one.

scalecut.png iqracut.png

Other notes:

  • QM12FFy 6th calibration (bpmAllMoverCalibration_20111206_023343.dat) is an outlier but I can see no reason to cut it. It was the only one of the 6 calibrations done in the second week.
  • The BPMs QF9BFF (x and y) and SF6FFx account for 6 of the remaining outliers. Nothing is obviously wrong with the calibrations but only two have been taken so far.
  • QF9AFFx seems particularly unstable for no obvious reason.

qf9aff.png

Mover Cut in Analysis

I added a cut to the SVD calibration analysis that removes anomalous mover readouts. All the outliers that were there because of this reason are now removed. The following histograms only have QF7FF calibrations cut.

mcutscale.png mcutiqra.png

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Topic revision: r5 - 07 Dec 2011 - FrankieCullinan

 
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