[Olympus] List of triggers

[Michael Kohl]

Dear Alexander,
isn't 10)+11) part of the "3 out of 4" proposed by A. Kisselev, which 
allows to monitor the tof efficiencies (and coincidence efficiency)? Or is 
this feature already part of 1) main trigger?

Are all trigger types subject to the second level trigger, or only the 
main trigger?

Best regards
    Michael



On Mon, 6 Aug 2012, Alexander Winnebeck wrote:

> Dear colleagues,
>
> as requested in the meeting I'm sending a list of all the parallel trigger conditions we take at the moment:
> 1) kinematic trigger (main trigger)
> 2) Left SiPM & right TOF coinc
> 3) Right SiPM & left TOF coinc
> 4) Left leadglass & right TOF coinc (pre-scale 2)
> 5) Right leadglass & left TOF coinc (pre-scale 2)
> 6) Left SiPM (pre-scale 8)
> 7) Right SiPM(pre-scale 8)
> 8) Left TOF coinc (pre-scale 3000)
> 9) Right TOF coinc (pre-scale 3000)
> 10) Left TOF coinc & right TOF or (pre-scale 150)
> 11) Right TOF coinc & left TOF or (pre-scale 150)
>
> The triggers 8-11 should be re-visited. At the moment nobody is using them as far as I know. The triple coincidences (10+11) can only be used with WC reconstruction and these triggers are actually only  a subset of the single arm trigger (8+9).
>
> There is always this classical decision about parallel calibration triggers or dedicated calibration runs. To come to a conclusion about this it is required to know something about the speed of efficiency variations. Therefore it would be very useful if the subgroups look into their calibration data from the February run and try to answer this question.
>
> When I don't get any complains within a week, I will remove conditions 10+11 and tune the pre-scaling factors such a way that the calibration triggers (4-9) do have the same countrate as the main trigger.
>
> Cheers,
>
> Alexander
>
> --
> Dr. Alexander Winnebeck
> winnebeck at mit.edu<mailto:winnebeck at mit.edu>
>
> Massachusetts Institute of Technology (MIT)
> 77 Massachusetts Avenue
> Bldg 26 / Rm 441
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>
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>
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| Dr. Michael Kohl, Assistant Professor and Staff Research Scientist
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