Dan Cheng6/11/2015

QXF coil measurementsplan at LBNL

QXF Coil CMM measurements at LBNL 2

Cross Section Measurement Locations

6/11/2015

• Same axial locations as being performed at BNL– With the addition of one more measurement

location at 742.24 mm (29.22”) for the SG location

QXF Coil CMM measurements at LBNL 3

CMM Measurements

6/11/2015

• LBNL uses Zeiss Accura for CMM, using built-in Calypso for post-processing – But we have not been able to weight different surfaces for alignment– All surfaces “best-fit” to reference geometry with equal weight

QXF Coil CMM measurements at LBNL 4

Post-processing Comparisons

6/11/2015

• Prior to identification of the asymmetry issue, all HQ magnets were built using data processed by the Calypso software for overall coil size

• LBNL now has the ability to post-process, with weighting, with both Polyworks and Spatial Analyzer

• We are performing an apples-to-apples comparison– BNL Coil measurement data (Faro Arm)– LBNL (Zeiss) measurement data, processed with:

• Calypso (for historical comparison)• SA (for comparison with BNL processing)• Polyworks (additional process check)

QXF Coil CMM measurements at LBNL 5

Fitting the profiles

6/11/2015

• Two methods per cross section:– “Global” best fit

• Objective is to compare with prior Zeiss/Calypso post processing

– “Weighted” best fit• Objective: to compare

with BNL data and to determine coil asymmetry

Global:Midplanes + OD + Alignment Key

Weighted:OD + Alignment Key

QXF Coil CMM measurements at LBNL 6

Status

6/11/2015

• Data is being processed on a few cross sections before applying to the rest of the cross sections and coils

• All four coils will have to be measured again next week, since axial locations of cross sections did not match those made by BNL