[BTeam] the XY magnets are horrible

[Jay Benesch]

I modeled the XH and XY magnets in TOSCA at 350 A, roughly the current 
we were running them at this spring.  The XY magnets were extended in 
length from 37.80" to 38.14" using pole shims in two cases and new steel 
in the third (2R). Pole gap was opened from 1.010" to 1.160". The XH 
was/is 37.83" long.  BdLs are within a few tenths of a percent of CED 
values interpolated to 350A.

I ran 2218 MeV KE electrons through the magnets at CED entrance/exit 
angles and split the sagitta on either side of the midplane.  I haven't 
offset beam path yet.

The XY magnets have Fourier components worse than the YR or Lambertson, 
albeit without the skew terms in the latter.  Models are horizontal 
bends, not vertical.

I'll get back to talking to visitors now.  I'll offset the orbits Sunday 
or Monday.

Jay

-------------- next part --------------
A non-text attachment was scrubbed...
Name: XH_XY_fourier.ods
Type: application/vnd.oasis.opendocument.spreadsheet
Size: 331479 bytes
Desc: not available
URL: <https://mailman.jlab.org/pipermail/bteam/attachments/20180519/3be1d0e9/attachment-0001.ods>