[Frost] helicity info in g9b data

[Eugene Pasyuk]

As we discussed at today's meeting I'll prepare detailed summary table 
of run conditions.
Meanwhile, to Mike's question about runs with circularly polarized beam.
The first group is runs 62321-62704 @E_e=3081.73 MeV (3 pass)
The second group is runs 63508-63599 @E_e=2265.99 MeV (2 pass) after 
target incident. Target polarization is lower.

-Eugene

On 1/19/12 16:44 , Michael Dugger wrote:
> Franz,
>
> Thanks for the info.
>
> If you know of a few runs that you are certain had circular polarization,
> that would be great. We are not interested in the actual helicity state of
> any event, instead we would like to try and see the azimuthal offset angle
> of the transverse magnetic field by looking at pion T asymmetry.
>
> If you don't know of, or remember, which runs definitely had circular
> beam, we will just wait for you to finish investigating the situation.
>
> Take care,
> Michael
>
> On Thu, 19 Jan 2012, Franz Klein wrote:
>
>> Hi,
>> this morning I claimed that the helicity information was correctly
>> extracted for most of the runs ... but that was not correct: by chance I
>> looked into cooked files where it worked!
>> Since we had delayed reporting, in part by 8 helicity intervals, in part
>> by 16 intervals, I have to get the correct sequence of helicity scaler
>> events (or cannot resolve the helicity info for a given helicity
>> interval). However, often the helicity info in the gated and ungated
>> scaler banks did not match during g9b, so I have to figure out how to
>> solve that over the next days ...
>> This concerns ~60% of the cooked files (as you see by chance I didn't
>> look into bad files ...)
>>
>> When I am done with that, I will write a wiki page about helicity info,
>> etc. (similar to
>> http://clasweb.jlab.org/rungroups/g14/wiki/index.php/Beam_Polarization_%28Circ.%29
>>
>> Greetings
>> Franz
>>
>> ===============================================================
>>                    Franz J. Klein, Associate Professor
>>                    CUA, Department of Physics
>>                    Washington, DC 20064
>>    office: Hannan Hall 206          phone: 202-319-6190
>>    or: Jefferson Lab,CC F-243       phone: 757-269-6672
>> ---------------------------------------------------------------
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>>
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