[Brahms-dev-l] Updated field values

While analyzing dA and p-p data at full field we found that the  
projection of FS tracks back to the beam line has a mean value of -10  
cm at full field. A possible explanation for this effect could be that  
we are using the  wrong values for the field in D1 or D2.
Dana, together with a  CAD tech. used a Hall probe calibrated against a  
NMR probe to do several measurements that show deviations of as much as  
5% at the highest field.
The results of those measurements, and a comparison to the values we  
use for the analysis, are placed in:

http://www.sdcc.bnl.gov/brahms/private/detectors/magnets/ 
UpdateOnMagnets.htm

   It looks like the deviation is the same for D1 and D2, and because  
the same probe was used to measure the excitation curves of all the  
other magnets, we have enough information to find the right field to  
use during data analysis.
One can also say that the probe I used for my measurements starts to  
deviate around 11Kgauss (D4 is the least affected)

Ramiro


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