[Rgc] Planning for the Switchover FTon -> FTout

[Sebastian Kuhn]

Dear all,

I am trying to assemble a list of things we would like to do (or must or should do) when we have our weeklong configuration change to FTOut/ELMO. As you may already have heard, most likely this changeover will be delayed by 14 days, to August 25, 2022, to make up for the 2 weeks of beam time we lost due to no/bad beam and target/Moller/raster etc. troubles.

I have started such a list below - please comment and send any items you can think of. I will try to join the weekly engineering meeting this Thursday (Eugene, please send me the Zoom coordinates) so we can discuss some of these items. We do have a little time, but it would be better if we could come up with a realistic plan ahead of time to give enough heads-up to the Hall B technicians, engineers and Denny.

I also want to take this opportunity to reiterate that I will be away the next 2 weeks, with intermittend internet access. I’m sure the next 3 RCs will have everything under control - Sylvia, Bryan and Stephen. Let me know if you need anything, and check the page https://clasweb.jlab.org/wiki/index.php/RG-C_RC_and_Target_Expert_Volunteers .

Thanks, and greetings - Sebastian


CHANGEOVER WORK TO BE DONE:
==============================

MUST:
———
1.)Disassemble beam line, remove downstream raster magnet, pull back target and solenoid, de-install FT and FTon Moller shield, install new ELMO Moller shield.
2.) Refill LTCC R2 and R6
3.) Repair/replace any broken/flaky modules

SHOULD:
————
1.) Repair cold-tank NMR circuit; re-confirm target cell position

LIKE:
——
1.) Replace x-Raster power supply with spare, check for oscillations
2.) Search for and repair leaks in LTCC R2 and R6.
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