[Halld-tagger] Photon spectrum shape

[Curtis A. Meyer]

Thanks Alex,  that is a very nice plot … Curtis
---------
Curtis A. Meyer			MCS Associate Dean for Faculty and Graduate Affairs
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> On Jan 12, 2016, at 5:01 PM, Alexander Somov <somov at jlab.org> wrote:
> 
> 
> Hi,
> 
> I started looking on the PS reconstruction/calibration.
> Here is a 5 min plot which can be of some interest:
> 
> https://halldweb.jlab.org/wiki/index.php/Beam_commissioning:_Fall_2015
> 
> 
> blue histo: acceptance corrected photon spectrum reconstructed with
>            the PS
> red markers: energy spectrum of collimated photons from cobrems
>             (Geant)
> 
> Both spectra have arbitrary normalization.
> 
> I didn't play much with the acceptance correction and energy calibration...
> (the trigger and PS efficiencies have to be understood as well).
> 
> 
> Cheers,
>       Alex
> 
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