[d2n-analysis-talk] Target spin and field rotation

[posik at jlab.org]

Hi all,

   A couple weeks ago Diana had brought up that there was a typo in our
target spin/field direction history on the wiki page

https://hallaweb.jlab.org/wiki/index.php/D2n_Target_Calibration_List#Field.2FSpin_Direction_History

The discrepancy took place after run 1498 which is late Feb. 16th. The
Target spin/field history on the above wiki page now matches what is seen
in the halla log book. The NMR signals also match what is expected for 
the  target spin directions target spin =90 degrees towards LHRS, positive
NMR and target spin = 270degrees towards BB, negative NMR.  I have
attached images of the NMRs from Feb 14th (20090214_S90.jpg) and Feb 16th
(20090216_S270.jpg). So it appears that this was fixed some time ago.

I did find a bit of a typo in the last field/spin history entry. The
target was rotated from field = 270 and target = 90 to field = 90 and
target = 270. However, when this was done, the pumping direction was wrong
and the original wiki linked to the NMR signal in this wrong state. So I
added a link to the correct NMR signal after the pumping direction was
corrected.

I also noticed that all of the links on the wiki field/spin history page
were broken due to the log book moving location, so I updated those links.

-Matt
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