[G14_run] linear polarization for 5 pass

[Ken Livingston]

Hi All,
The linear polarization fits for runs 69202 and 29203 (PARA and PERP 
2.1GeV, Ebeam  = 5.551GeV) are here:
http://nuclear.gla.ac.uk/~kl/g14/PARA_2100_5551.gif
http://nuclear.gla.ac.uk/~kl/g14/PERP_2100_5551.gif

Peak polarizations are about PARA=80% and PERP=78 %.

All seems reasonable.

Cheers,
Ken




On 04/08/2012 11:35 AM, Ken Livingston wrote:
> Hi All,
> I made a rough fit to some of the collimated data with linear
> polarization from the test we had 4pass beam.
> The fractional energies we ran at were about the same as those which
> will be used for 5 pass beam.
> ie E_edge_4pass ~ 4/5 * E_edge_5pass
>
> The results look good:
> http://nuclear.gla.ac.uk/~kl/g14/
>
> The peak polarization is ~86% at the lowest energy setting, dropping to
> ~81% at the highest energy setting.
> PARA is slightly broader than PERP, as we saw online.
>
> For all peak positions the mean polarization should be over 75%.
> At 5 pass the results should be the about same.  I'll produce some
> similar plots for the 5 pass data soon.
>
>
> Cheers,
> Ken
>