Run Planning Meeting Notes, June 23 - June 29, 2022

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Meeting are via ZoomGov: connect (Meeting ID: 160 199 0060 / Passcode 8394)

MCC whiteboard

Hall D counting room white board

Spreadsheet with list of runs

next meeting Monday June 27

1. Friday:
   • Beam restored at 9pm
   • Richard completed the TagM scan
   • Richard looked at the AC current balance and thought it looked okay, asked us to watch for correlated movement in x & y
   • Quiet production running through owl shift (with hall C at only 20 uA).
   • Shift summaries: early riser day swing owl
2. Saturday:
   • PD meeting news: RF need to work in the accelerator tunnel to get higher current to Hall C. They think something is really out of place. So that this can be done on Monday, when more experts are available, the schedule was switched so that Hall B's spin dance will be on Sunday and we have to do our TAC run today.
   • Bo spotted that the random pulser was not running (it was running on Friday evening).
   • Sasha took some data with the TAC when Hall C was inadvertently down (their magnet problem) and more with it running at 20 uA.
   • Shift summaries: early riser day
3. Reports:
   • Preliminary FMWPC_Performance study (Alex A)
4. Issues:
   • Mark/Malte need to replace an FCAL base at the next access.
   • BCAL power problem bypassed

Friday June 24

1. Last 24h:
   • Accelerator went down at 6:20 for the power shed.
   • RF recovery coupled with trying to get more beam to Hall C did not go quickly. We were promised beam after 5pm, then 7, then 1030, and then 4am but it still has not arrived.
   • Moved target into the beamline
   • Scot replaced DIRC pressure transducer
   • Sasha modified the CPP configuration as requested
   • Straight track config needs to be used, to get feedback from Lubomir.
   • Sasha restarted the PS coinc scalers, they were frozen.
2. Shift Summaries
   • early riser day swing owl
3. Reports
   • MCC still recovering the machine. RF recovery turned out to be hard, did not finish that until around 8pm, then ops group started phasing up all the cavities. This is apparently almost complete but with no RF headroom. MCC would like to take another 4h to work on this but don't have all the RF group experts today. However they plan to replace an arc detector & look for low spot in a waveguide that might be full of water. Should have beam by 11am-12pm if nothing else breaks (their words).
   • MCC today & this weekend will try high current to XC. Monday spin dance for B. Hall C does not have any planned downtime.
   • Bleedthrough prediction from Hovanes
   • Beam structure from Beni
4. Issues
   • Empty target rates & drifts from Alexandre
   • Beam stability from Hovanes
   • AC gain change suggestion from Richard
5. Plans
   • Richard (available all day) + Hovanes (more available before 4pm) look at A.C. Naomi will email Edy, Matt + Mike a heads up.
   • Richard - repeat 2 rows in microscope scan
   • Return to production. Cycle through 240M events for each of 45perp, 45perp, 135para, 135para, then 60M events on the AMO on the goniometer.
   • Production as above should be our default for 6d, with 1d on empty target.
   • Try again for the TAC run on Friday or at the weekend. Sasha would like 1-2h to set up, then some time to evaluate before taking the rest of the data.
   • Next meeting will be Monday unless there is a sudden need during the weekend.
6. Commissioning steps temporarily postponed:
   • Flux optimization/Act .Col. calibration
   • Bleed-through test: measure bleed-through with A slit as usual and A slit completely closed to see whether using B slit would help.

Thursday June 23

1. Last 24h:
   • Inadvertent change to tagger magnet settings backed out
   • Target moved out
   • Richard took the microscope scan data needs another 20 mins
   • Bleedthrough beam current was very low
   • Thunderstorms made TAC run impossible.
   • Sasha configured the trigger for straight track running
   • Beam back near midnight but ran into DAQ problems.
   • Overnight empty target production
2. Shift Summaries
   • day swing owl early riser
3. Reports
   • From MCC: Reminder that 911 from lab phone is forwarded to normal 911 and also automatically informs the crew chief, guard shack, etc that there's an emergency, crew are CPR qualified & have AED. This doesn't happen from RC phones (or cellphones). No problem w 911 from other phone; if there's a lab phone handy it saves some time.
   • Power shed 3-4pm today, beam restoration likely 5pm+.
   • MCC planning to raise the current to Hall C.
4. Issues
   • DAQ crash ROCTRIG2 - called Sergey
   • DAQ lost comms with ROCBCAL11 - stop & restart DAQ fixed this
   • AD00C x position moving probably due to beam energy changing
   • (Tagger NMR)
   • (DIRC sensor)
   • (DAQ livetime)
   • (Beam position stability)
   • (U1-10-TOP MPOD crate)
5. Plans
   • No beam until swing.
   • Walk-through at 11am
   • Site exit opposite Tech Center closed most of the day - need to exit by resfac or Lidl.
   • Put the target back (done).
   • Sasha - check straight target configuration.
   • Sasha - make new CPP configuration as requested by email
   • Richard - repeat 2 rows in microscope scan
   • Return to production. Cycle through 240M events for each of 45perp, 45perp, 135para, 135para, then 60M events on the AMO on the goniometer.
   • Production as above should be our default for 6d, with 1d on empty target.
   • Try again for the TAC run on Friday evening
6. Commissioning steps temporarily postponed:
   • Flux optimization/Act .Col. calibration
   • Bleed-through test: measure bleed-through with A slit as usual and A slit completely closed to see whether using B slit would help.