[clas_members] Resumption of RGC and shifts

[Eugene Pasyuk]

Dear Collaborators,

First, a brief status update. The configuration change from FT-OUT to FT-ON is ongoing as planned. It is expected to be completed in the first week of January.
As you all know, the RGC run was suspended on November 11 due to the solenoid power supply failure. The root cause of the failure was analyzed and understood:  it was a bug in the power supply firmware. This was confirmed by the vendor, Danfysik. All replacement parts needed for repair have been ordered and have already been received. The magnet group, DC power group, and Hall B engineering are working on repairs. The engineers from Danysik are expected to be at JLab the second week of January. They will bring newly updated firmware. They will review all modifications done to the power supply and will do tests of both power supplies, torus, and solenoid, with new firmware. Once the power supply tests are successful we will proceed with a comprehensive test of the magnets. The test plan is being developed. This will take at least a week.
Under the most optimistic scenario, Hall B may be ready to receive beam on January 23.
With that said, All shifts are canceled until January 23rd. Since there may be a further delay we recommend to those who have shifts assigned for the week of January 23 and require travel consider the possibility to trade their shift with local collaborators. Especially for expert shifts. For the worker shifts, we still have a remote option possible.
I will send updates if anything changes.

Stay tuned and enjoy the holiday break. Hope to see you in the new year in the counting-house.


-Eugene
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