[Halld-tagger] [GlueX] EPICS events in data stream

[Alexander Somov]

Hi,

>From the Pair Spectrometer we'll record:
- PS coincidence rate for specific energy bin (lumi monitor)
- coh peak position
- polarization fraction

Note, PS has a special trigger type, there will be a lot
of information available during data reprocessing.

Cheers,
       Sasha


On Tue, 24 Jun 2014, Richard Jones wrote:

> Hello David,
>
> For the microscope, I would like to have a set of key voltage levels and
> temperatures in the frontend recorded in the event stream.
>
> -Richard J.
>
>
> On Tue, Jun 24, 2014 at 7:52 AM, David Lawrence <davidl at jlab.org> wrote:
>
>> Hi All,
>>
>>  One of the features that will be implemented in the online is the ability
>> to insert non-CODA events into the data stream. This would mainly include
>> EPICS variables that might be useful in the offline analysis where the full
>> EPICS archive is not readily available. For example, the electron beam
>> current or a temperature in the hall. What is needed is a list of the EPICS
>> variables that might have value in the offline and the frequency by which
>> to read and insert them. Realistically, variables cannot be inserted more
>> often than once every 2 seconds. I assume many of these though will not be
>> written more than once per minute. If you know of good candidates of
>> non-CODA data that should be inserted into the data stream, please send
>> them to me along with a suggested insertion frequency. I will compile them
>> into a configuration file that will also serve as the official list.
>>
>> Regards,
>> -David
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>