I calculated nu versus delta by tracking and using sddsnaff, and tune_footprint.
The results are different as could be seen in the attached pictures.
Could you explain the difference?
Using the tune_footprint is straightforward and the code is in tunefootprint.zip
Tracking requires postprocessing and gives the same nu vs delta dependance as in MAD-X PTC.
Results of the tracking I postprocess as following (track-centroid.zip)
Code: Select all
sddscollapse results/ct_ring.fin results/ct_ring.finc
sddsnaff results/ct_ring.w1 -pipe=out -column=Pass,Cx,Cy -terminate=frequencies=1 \
| sddscombine -merge -pipe \
| sddsxref -pipe results/ct_ring.finc -take=MAL.DP -rename=column,MAL.DP=delta \
| sddsmpfit -pipe -indep=delta -depen=CxFrequency,CyFrequency -terms=7 \
| sddsxref -pipe results/ct_ring.twi -leave=* -transfer=param,nu?,dnu?/dp \
| sddsprocess -pipe=in results/ct_ring.fit
Respectfully,
Anton