[Sane-analysis] Minutes if Feb 10 Analysis Meeting

[O. A. Rondon]

> *_Hovhannes:_* Looked at SR distribution for range of parallel runs
> (72912-72924) with curious asymmetries. Noticed that edge of target
> getting hit by beam, which seemed to be off in position. Applied cut to
> SR with varying sizes (radius of 0.5 and 0.75cm). This doesn't seem to
> make any significant difference.
> 
> Hovhannes and Jon are having inconsistent results for their parallel
> asymmetries. Oscar suggested they make tables containing numbers
> including asymmetry, target polarization, ... 
> 

The log entries about these parallel runs show that:

- there was a sudden polarization increase during run 72920
https://hallcweb.jlab.org/hclog/0903_archive/090307034732.html,
see plot at
https://hallcweb.jlab.org/hclog/0903_archive/090307043017.html

- comment that muwaves might be related to polarization jump
https://hallcweb.jlab.org/hclog/0903_archive/090307041230.html

- repeated target movements after 72923, after noticing beam hitting cup
https://hallcweb.jlab.org/hclog/0903_archive/090307064853.html

The target and beam seem to have been well centered on the cross
hairs at the beginning of this set of runs starting with 72913, but the
raster looks large, especially in the vertical (~2.7 cm), assuming the
online calibration was accurate
https://hallcweb.jlab.org/hclog/0903_archive/090306194735.html

and the beam may have also drifted, so raster cuts may need to be
different for some runs, at least up to run 72924.

Cheers,

Oscar