[Clas12_first_exp] no rc meeting today and plans for Monday

[nick markov]

Dear all,
to follow up with the new information from the MCC, I have recently get a call from PD, the plan from MCC is:
- they will take beam away at 9 am tomorrow;
- the plan for the downtime is to focus on improving beam quality, specifically high current for the Hall C;
- they want to be done by a swing shift or even before but they can not give any definitive answer now. They want to discuss it tomorrow at the morning meting at the MCC.
I think this way we can postpone our decision until 7 45 meeting tomorrow.
Depending on the downtime, we can either
- ramp the magnets down starting at 9 am and take zero field Forward Carriage cosmic ray runs and do some work on the BAND PMTs (it requires Solenoid to be down);
-  just perform a regular maintenance.
As far as I understand, tracking detectors group do not have much interest in running zero field runs at this moment, so as soon as we are finished with the downtime we should go back to production until Tuesday.
Nick.
> On Oct 14, 2018, at 11:49 AM, nick markov <markov at jlab.org> wrote:
> 
> Dear All,
> we have been taking data overnight. The beam was not very stable and we have a few issues with the DAQ. 
> The gas supply pressure for DC is still low, but the engineer on call is notified and told he will take care of it.
> On top of that, we took a run with the reduced windows for the DC:
> https://logbooks.jlab.org/entry/3608918
> 
> As of now there is no definitive answer from the MCC on how long the bean studies will take. They have a feeling that it will take less then a full shift. I will let you know as soon as I have an update.
> As for plans for tomorrow, I think there are two possibilities:
> - if downtime will take 4 hours or more, we will rump magnets down and take zero field Forward Carriage cosmic ray runs;
> - if the downtime will be shorter we will not take magnets down and just perform a regular maintenance.
> 
> The question I have to the DC and SVT experts is if they want to do a zero field runs, since if the answer is “yes” and we rump magnets down tomorrow, we can take a zero field data overnight until RF studies in the morning.
> Best regards, Nick.
> 
> 
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