[BTeam] Hall A status

[Jay Benesch]

Hall A harp swipes were taken 0059-0134.  Not good.

fopt to A https://logbooks.jlab.org/entry/4370102
Fopt results from /usr/ntfs/public/optics/diforb/25may060243

qsUtility data was taken with 1C05 but application failed to read data
https://logbooks.jlab.org/entry/4370128

Randy was here all night working with Dillon on empirical matching with 
1C07 and 1C08 quads.

When I got in I suggested trying 1C19 and 1C20.  Increasing and 
decreasing these by 50% made things worse.

I created templates for IHA1P02 with full range of MQR1C20, copying the 
existing pass 2 file.  The X data is acceptable with about five points 
that will have to be discarded given span.  Data will have to be 
reanalyzed back propagated to 1C04 but it looks good.
https://logbooks.jlab.org/entry/4370195

The y wire range in the file I coped was not good.  Dillon has 
determined correct values.  Ops will copy my files and edit them.  I'll 
correct y wire later.

Once data is available for both wires and back-propagated upstream of 
1C04 the match will be calculated and if it looks reasonable, 
downloaded.  Harp scans in A will tell the tale.  If beam is close at 
1H04A and 1H04B, touch up with 1C19 and 1C20, perhaps using the 1H04 OTR.

If this process did not converge for Hall A the outlook is depressing.
IHAAE01 https://logbooks.jlab.org/entry/4370153 is still tolerable so I 
wouldn't match there or upstream, others may differ.

AT match was done with fifth pass to Hall B.  Hall B quads are on 
design.  https://logbooks.jlab.org/entry/4370196 shows values. Hall C 
moderate manual changes to 3C06, 3C07 and 3C20 brought into spec.  As 
stated above, manual changes to A have not worked.

If Hall A is the highest Physics priority, someone competent (not me) 
could edit the AT line match file to take the data with 1C05.  The 
Lambertson focusing terms are not in the elegant deck.  This process may 
get the optics in A close enough for manual touch-up.  It will require 
substantial changes to B and C optics because of Lambertson focusing in 
A beam path.

(ascend soap box) Yves and I have been trying for three years to get the 
resources to pull un-used quads from the A and C lines, build 
double-quad girders to replace *C04 and *C05, and install the new 
girders as these would have adequate strength for qsUtility data 
collection on fifth pass. 
https://jlabdoc.jlab.org/docushare/dsweb/Get/Document-272394/23-022.pdf 
(descend soap box)