Run Planning Meeting Notes, August 3- August 10, 2022
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Meeting are via ZoomGov: connect (Meeting ID: 160 199 0060 / Passcode 8394)
Hall D counting room white board
Contents
Monday August 8
Past 72 hours
- Running on empty target until Friday morning, 7:15am.
- No beam until Saturday 1am due to RF-recovery (Friday 7:15-11am) and then several accelerator problems (RF-recovery recovery, storm). Then, very good beam (in terms of ABU, trip rate and stability)
- From Saturday 1am, production on Pb target (30nA)
- 40.1h of ABU (59% efficiency).
Shift Reports
- Friday Day shift summary
- Friday Swing shift summary
- Friday Owl shift summary
- Saturday Early Riser shift summary
- Saturday Day shift summary
- Saturday Swing shift summary
- Saturday Owl shift summary
- Sunday Early Riser shift summary
- Sunday Day shift summary
- Sunday Swing shift summary
- Sunday Owl shift summary
- Monday Early Riser shift summary
Reports
- Harp scan (Saturday 1am): 5C11, 5C11b and radiator harp. The beam convergence looks good.
Issues
- CDC HV needs to be slowly ramped up after a trip
- RCDB error, Account from owl shift leader
- Calorimeter LED pulsing was off and then reestablished
- MCC waits for a trip to put the dumplette in. When beam is trippy, it is not a long wait, but Eugene had to wait 15min. Is that a good policy to save on 1 trip every ~3h? (15min/(number of running hall)=5min BANU. One trip is typically 30s).
Plans
- Monday day (or possibly Tuesday): 5 -> 4 pass change for Hall C (Around 4h. Mostly invasive).
- Malte will change a couple of PMT basis in FCal.
- Production on Pb target.
- We are now doing para/para/perp/perp/amo
- Run event goals are 50% higher (360M for diamond, 90M for amo)
Friday August 5
Past 24 hours
- Running on empty target (60 nA).
- Plan to do TAC run Thursday was postponed (Today, or around Aug. 15th).
- Everything is going well: 15.1h of ABU (63% efficiency). Time loss mostly due to thunderstorm (3h).
Shift Reports
Reports
- No report today?
Issues
- Rootspy problem.
- Lost lock. Notice by owl shift crew who notified MCC.
- Difficulties with Coherent edge peak matching template during day shift and owl shift (solved by Hovanes).
- Hot wire number 40 for FMWPC Occupancy Layer 1 (Beni, including ~7pm & 8:30pm opportunistic accesses), (Beni), (Igal, see also swing shift summary),(Hovanes, on EPICS channel change), (Justin), (Justin), (Eugene)
- After swaping HV channel for FMWPC there is no spare HV channel left (and HV channel 4 is already seeing higher currents).
Plans
- RF recovery until ~noon +/- 1h. Hall C planned to be down until 1pm.
- Access to put back Pb target if no TAC run today?
- TAC run in the afternoon ? (Thunderstorms forecast), or production on Pb.
- No RC meetings this week-end (unless some problem occurs).
- Monday day: 5 -> 4 pass change for Hall C (Around 4h. Mostly invasive).
Thursday August 4
Past 24 hours
- Running on empty target (60 nA). Everything is going nicely and smoothly: 16.6h of ABU (69% efficiency).
Shift Reports
Reports
Issues
- temporary main trigger rate increase seems to be due to a hot FCal channel.
- Hot channel in FCAL
- FMWPC Chamber 1 hot wire and trips due to high current
- 2 ns shift fixed by Sean, follow-up by Justin
- A peak at wire number 40 for FMWPC Occupancy Layer 1 appears to be causing trips, see also [Early Riser shift summary https://logbooks.jlab.org/entry/4024097]
Plans
- Production running on empty target until Thursday
- Thursday morning, TAC run starting ~9am? (7-8 hours, assuming stable beam)
- RF Recovery for 4hrs on Friday to prepare for weekend. Starts at 7:15am.
- Monday day: 5 -> 4 pass change for Hall C (Around 4h. Mostly invasive).