[Clas12_rgb] [EXTERNAL] Low lumi run

[Bryan McKinnon]

Dear Marco

This sounds like a prime topic to discuss at the RC meeting later today since we have a short time remaining until Thursday morning and we should solidify our run plan. The machine is currently down for a repair in an attempt to restore beam delivery to us (Hall-B). We have been down since around 8pm eastern last night. I will provide an update at the meeting.
With regards to the meeting. Since Gagik is giving a seminar this afternoon and there may be interested parties attending that, I propose to have the RC meeting at 2:45pm eastern.

Regards
Bryan


> On 28 Jan 2020, at 09:08, Marco Contalbrigo <mcontalb at fe.infn.it> wrote:
> 
> Dear Silvia,
> at the last RGB meeting you questioned the need of the low
> beam current runs for SIDIS. In general our concern is about
> the various different running conditions we conducted that
> might prevent a reliable evaluation of the systematics, in
> particular related to the tracking efficiency.
> 
> For SIDIS, the solution we identified is to collect a not
> negligible statistics at ~10 nA, to be used as a benchmark
> of the systematics. This should be done for each data
> taking period, as the experiment conditions may change.
> 
> To our knowledge, there was an agreement on the low lumi
> runs and they were accounted for in the short term schedule.
> At this stage, it would be difficult to get the initially
> foreseen additional 70 M triggers. However, we consider
> important to have at least another 10 nA run with 30 M
> triggers, i.e. about 6 hours that can be scheduled at the
> end of this RGB period.
> 
> Best regards, Marco, Aram and Marco.

___________________________________

Dr. Bryan McKinnon

Nuclear and Hadron Physics Research
School of Physics and Astronomy
University of Glasgow
Glasgow
G12 8QQ
Scotland UK

Tel: (+44/0) 141-330-7226
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