[Sane-analysis] More wiki updates

[O. A. Rondon]

Hi,

I have updated my wiki section on the method to calculate the true event
theta and phi, based on a simple fit to the target field's Integral B.dl.

https://hallcweb.jlab.org/experiments/sane/wiki/index.php/Simple_Correction_for_the_Target_Field_Deflection#Comparison_between_Integral_B.dl_and_track_fitting

The update is a new section, comparing the angles calculated by the
Integral B.dl method and the angles calculated by the track fitting
method currently being used in the analysis. The agreement is generally
at the 10% or better for phi, and 5% for theta. It's not as great as I
would have expected, but it could be due to the depth correction that
shifts the apparent cluster coordinates, which also is more important
away from the center, where agreement is quite good (better than 1%,
except for phi at 180 deg, which is strange).

Feel free to play with the spreadsheet.

Cheers,

Oscar