[Clas12_rgb] [EXTERNAL] RC meeting and RGB summary

[Gilfoyle, Jerry]

Hi Folks,

We're running smoothly now with work continuing on the DC occupancies. I don't see a compelling reason to meet face-to-face today. Let me know if you think otherwise.

Below is the summary for the last day or so.

jerry

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Summary of last day (or so) (1/12/20)

Continued production running at 35 nA to keep Region 1 DC occupancies to a minimum.

The switch to Hall C, 1-pass running was done Sat swing shift and included a 
change in the Wien angle of 11 degrees.

Sunday, day shift we did Moller runs with half-wave plate in and out. The 
polarization was

HWP out: -86.64 +/- 1.50
HWP in:   84.25 +/- 1.49

DC occupancies - Work continues to understand why the DC occupancies are higher 
   	       	 than the RGB runs in spring, 2019 and Dec, 2019. The lead suspect
		 remains the DC gas mixture. 
	       - Stepan is looking at Zhiwen's cooking results as they are made 
	         available.

Upcoming
     Hall C: Will go to 5-pass in two days and will return to previous Wien angle
       	     setting (so we won't have to do a Moller).

Bluejeans - New address for RC meetings: bluejeans.com/8928008153.



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Dr. Gerard P. Gilfoyle
Physics Department
University of Richmond, VA 23173  USA
e-mail: ggilfoyl at richmond.edu
phone:  804-289-8255