PolHe3 Punch List For Restart

Step 1

Test Kepco in current mode (Bill)
- New filter (for 180 Hz) to install for current mode operation fix. Can always go to voltage mode if it doesn't work.
- Establish/verify a known-good production mode

pNMR issues
- Software : Software/driver issue needs to be resolved. Checkout during next non-production down time (Moller or SHMS fix)

EPR problems : [1] saw some progress on Tuesday [2], but issues remain.
- Tentative plan now is to continue the d2n program by replacing the photo-diode that is placed directly on the pumping chamber (we have many spares).
- It would be good to write up a procedure to streamline this replacement procedure for us and RadCon

NMR Calibration Constants : Verify that calibration constants and input values associated with NMR and other polarimetry are consistent and will be correct when the software is restarted
- [3] [4] [5] [6] [7] (Bill, Junhao, Arun)
  - Add list of calibration runs and what constants apply to what production runs here: PolHe3_Polarization_Measurements

Fix the epics variable for target field angle. This is the PV which is calculated from the coils currents that is in the startOfRun entries. It needs a new formula since we changes the coil orientation (Bill)
Verify that all other EPICS channels are present and are still being archived [Brad]
Look at trigger related signals on the scope under high load (reftime extra pules, FADC reftime-shaper pileup?, NGC noise/rate questions) [Brad]

Target Ladder software must throw an error on a 'voltage' readback mismatch! [8] -- Ethan working on this

Get 3H07B Harp repaired [9] [10]; and a puzzle [11]
- This is being pursued by Brad, Thia, et al. Still trying to make sure it gets on EES/IC's pre-beam repair list.

https://logbooks.jlab.org/entry/3807201 Has Arun's note about the unfortunate reference cell alignment vs. the rest of the target ladder.
- NOTE: "Shift Leader must request a beam that is shifted horizontally to the beam left side by 2 mm to prevent scraping."
- Is there a way to shift the reference cell position before beam starts?

USB bridge : Contact with Target readbacks through AnywhereUSB USB bridge still drop out on occasion

iochc10 issues : Green now: Rebooted 3/2/20 with Dave Gaskell assistance. OPs wished to reboot hung iochc10 [12], noted in December as well [13]
- Confirm relevant procedures have been updated at MCC (Gaskell, Paul V.?)
- This runs the Moller cryo controls and should not be rebooted without expert oversight (does not impact operations). D. Gaskell is looking into getting this addressed properly with OPs.

Compton related items in Hall C beam steer-up procedure still cause confusion between MCC and Shift Crew -- Gaskell?
- Procedures need to be updated at MCC

Verify that inputs to 'Scale32'/G0 scalers (ie ROC5) are > 10ns in width. (Brad, Steve)
- replace the G0 scalers with something newer/better (SIS38xx or similar)

Online analysis software ready to go? (Sylvester?, Brad)
- Most should be fine, but are we missing any 'physics' plots?

Copied from pre-beam punchlist done just before MC6 shutdown. Some items are completed and just need verification (as needed).

[RadCon, RC] RadCon checklist
[Gaskell] Beamline checklist
[Brad] Detector/DAQ checklist
[Walter] Hall checklist
[OPS, RC] Schedule hot checkout of Hall C arc magnets/power-supplies
[OPS, RC] Verify all relevant FSDs that may have been masked for the down are known about and ready to unmasked when appropriate
[Lassiter] Enable all spectrometer magnet supplies, restore production settings for Cryo
[Gaskell] Moller cooldown
[Brad] Double check that rotation is enabled in the GUIs for both spectrometers
[Brad] Ramp all SHMS and HMS magnets to something modest (quick check), or to first kinematic. For example:
- SHMS: 11.0deg, 7.5 GeV/c
- HMS: 13.5deg, 4.2 GeV/c
- NOTE: Coordinate with the target group on the appropriate HB setting so we don't interfere with any target pumping.
[Techs, Brad?] Do a final check to ensure that there are no potential issues with remote spectrometer rotation
Restart main alarm handler (resets masked channels)
Restart target alarm handler (if needed)
??