[Halld-offline] Beam Polarization

[Curtis A. Meyer]

Yes, but it does depend on the photon energy. E.g. how far away from the coherent edge are you?
Events near the edge will have the highest degree of linear polarization, while those far away will
have less. If the edge is stable, the function is pretty simple., but we still need to be able to assign
both a polarization and a polarization direction to our photons on an event-by -event basis.

Curtis
---------
Curtis A. Meyer			MCS Associate Dean for Faculty and Graduate Affairs
Wean:    (412) 268-2745	Professor of Physics
Doherty: (412) 268-3090	Carnegie Mellon University
Fax:         (412) 681-0648	Pittsburgh, PA 15213
curtis.meyer at cmu.edu	http://www.curtismeyer.com/



> On Feb 22, 2016, at 8:25 PM, Paul Mattione <pmatt at jlab.org> wrote:
> 
> I was under the impression that, for a given beam energy, the polarization would be relatively constant over the course of a run.  
> 
>  - Paul
> 
> On Feb 22, 2016, at 8:22 PM, Curtis A. Meyer <cmeyer at cmu.edu <mailto:cmeyer at cmu.edu>> wrote:
> 
>> Hi Everyone,
>> 
>>   I am not sure if we have this capability yet, but as we move forward we are going to
>> want the REST files to contain the photon polarization. This is likely a function that
>> we have to call when we have decided what the correct photon is, but we should have
>> the hooks in place to do this on an event-by-event basis.
>> 
>> Curtis
>> ---------
>> Curtis A. Meyer			MCS Associate Dean for Faculty and Graduate Affairs
>> Wean:    (412) 268-2745	Professor of Physics
>> Doherty: (412) 268-3090	Carnegie Mellon University
>> Fax:         (412) 681-0648	Pittsburgh, PA 15213
>> curtis.meyer at cmu.edu <mailto:curtis.meyer at cmu.edu>	http://www.curtismeyer.com/ <http://www.curtismeyer.com/>
>> 
>> 
>> 
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