[Clas12_first_exp] RC & TCB meeting

[burkert]

Francois,
how were these data analyzed? Are the time windows for the DCs trimmed 
to the same values that Veronique showed to day,  ~250ns for R1, ... or 
did you use the standard values that Mac had included for the data 
taking, which are larger? The difference should be significant because 
of high accidental background. I don't know what Joseph used in the 
results he showed today.

We should have results that can be compared directly. .. apples to 
apples....

Volker


On 2/23/18 8:35 PM, Francois-Xavier Girod wrote:
> For comparison with Joseph's results, please find attached my results 
> for the number of hit based track (triangles) and time based tracks 
> (circles) per electron per sector (colors)
>
> The change I found from 35 nA (run 2997 cooked with 5a.0.11) to 75 nA 
> (2710) is not insignificant, depending on the sector, of the order of 
> 30% +/- 10% or so
>
> Note that the electron detection efficiency should drop in this ratio
>
> We discussed next steps in this study, beginning with getting a better 
> control over the electron rate with the gated accumulated beam charge
>
> Comments and suggestions are welcome
>
> Best regards
> FX
>
> On Thu, Feb 22, 2018 at 11:04 PM, burkert <burkert at jlab.org 
> <mailto:burkert at jlab.org>> wrote:
>
>     Dear all,
>
>     Here are the topics we need to discuss at the combined RC/TCB
>     meeting tomorrow 1:30pm in room A110.
>
>     _Agenda:_
>
>     1) RC report (Rafayel)
>
>     2) Triggers (Valery, Serguei)
>
>         Electron trigger optimization
>
>         Hadron Trigger
>
>         MesonEx trigger
>
>         Prescaled triggers for normalization
>
>     3) Tracking efficiencies vs luminosity (Mac, Veronique)
>
>     4) Program for the remaining program (all)
>
>     5) Any other topics
>
>
>     See you all tomorrow.
>
>     Volker
>
>
>
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