Difference between revisions of "Run Planning Meeting Notes, August 3- August 10, 2022"
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* [https://logbooks.jlab.org/entry/4026903 Early Riser shift summary] | * [https://logbooks.jlab.org/entry/4026903 Early Riser shift summary] | ||
=== Reports === | === Reports === | ||
− | *Harp scans: [https://logbooks.jlab.org/entry/4026585 5C11], [ | + | *Harp scans: [https://logbooks.jlab.org/entry/4026585 5C11], [https://logbooks.jlab.org/entry/4026587 5C11b] and [https://logbooks.jlab.org/entry/4026603 radiator harp]. [https://logbooks.jlab.org/entry/4026614 The beam convergence looks good]. |
=== Issues === | === Issues === | ||
− | * [https://logbooks.jlab.org/entry/4026820 TAGH major link alarm]. [https://logbooks.jlab.org/entry/4026819 Description by shift leader]. Cannot communicate with crate, but | + | * [https://logbooks.jlab.org/entry/4026820 TAGH major link alarm]. [https://logbooks.jlab.org/entry/4026819 Description by shift leader]. Cannot communicate with crate, but rates are fine -> we decided to run as it is (monitoring TAGH scalars with stripcharts) and have a look latter. |
*Last night, had to wait again with beam down for 15min for a trip to be allowed to insert amorphous radiator. RC wrote again to Hall D ops contact and PD to ask for this policy to be amended. RC will complain at the weekly 1:30pm MCC meeting. | *Last night, had to wait again with beam down for 15min for a trip to be allowed to insert amorphous radiator. RC wrote again to Hall D ops contact and PD to ask for this policy to be amended. RC will complain at the weekly 1:30pm MCC meeting. | ||
=== Plans === | === Plans === | ||
− | * Production on Pb target. | + | * Production on Pb target. We will not switch to empty target tomorrow as initially considered. |
− | * [http://accboard.acc.jlab.org/ Thursday 11th: maintenance day starting at 6:30am.] | + | * [http://accboard.acc.jlab.org/ Tomorrow (Thursday 11th): maintenance day starting at 6:30am.] |
**Solenoid current to be lowered because of cryowork. | **Solenoid current to be lowered because of cryowork. | ||
− | * Next pass change (4->3) for Hall C will be Tuesday. They will | + | * Next pass change (4->3) for Hall C will be Tuesday. They will be down for 6h-8h Monday to install their aerogel. Monday is auspicious for a TAC run. |
− | + | ||
= Tuesday August 9 = | = Tuesday August 9 = | ||
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* [http://accboard.acc.jlab.org/ Thursday 11th: maintenance day starting at 6:30am.] | * [http://accboard.acc.jlab.org/ Thursday 11th: maintenance day starting at 6:30am.] | ||
**Solenoid current to be lowered because of cryowork. | **Solenoid current to be lowered because of cryowork. | ||
− | * Next pass change (4->3) for Hall C will be Tuesday. They will be down for 6h-8h Monday to install their aerogel. | + | * Next pass change (4->3) for Hall C will be Tuesday. They will likely be down for 6h-8h Monday to install their aerogel (unless they run with perfect efficiency, in which case they may |
+ | do it Friday. This is very unlikely). So, Monday appears to be auspicious for a TAC run. | ||
= Monday August 8 = | = Monday August 8 = |
Latest revision as of 09:39, 10 August 2022
Back to Run Coordination Meetings:Summer2022
Meeting are via ZoomGov: connect (Meeting ID: 160 199 0060 / Passcode 8394)
Hall D counting room white board
Contents
Wednesday August 10
Past 24 hours
- Pass change for Hall C (8:30am-13:30)
- Malte changed 3 PMT basis in FCal.
- Harp scans when the beam came back.
- Running on Pb target (30 nA). Another relatively good day: ABU=13.9h for the day (minus 4h of pass change -> 70% efficiency). Overall, quite a good week: ABU=103h for the week (64% efficiency).
Shift Reports
Reports
- Harp scans: 5C11, 5C11b and radiator harp. The beam convergence looks good.
Issues
- TAGH major link alarm. Description by shift leader. Cannot communicate with crate, but rates are fine -> we decided to run as it is (monitoring TAGH scalars with stripcharts) and have a look latter.
- Last night, had to wait again with beam down for 15min for a trip to be allowed to insert amorphous radiator. RC wrote again to Hall D ops contact and PD to ask for this policy to be amended. RC will complain at the weekly 1:30pm MCC meeting.
Plans
- Production on Pb target. We will not switch to empty target tomorrow as initially considered.
- Tomorrow (Thursday 11th): maintenance day starting at 6:30am.
- Solenoid current to be lowered because of cryowork.
- Next pass change (4->3) for Hall C will be Tuesday. They will be down for 6h-8h Monday to install their aerogel. Monday is auspicious for a TAC run.
Tuesday August 9
Past 24 hours
- Running on Pb target (30 nA). Very good running: ABU=17.1h (71% efficiency)
Shift Reports
Reports
Issues
- DAQ RCDB warning occurs from time to time (see swing and owl shift summaries). see e.g. here for some account. It is a know issue and Sergei will fix it during the experiment transition.
Plans
- Today: 5 -> 4 pass change for Hall C. Starts at 8:30am.
- Malte will change a couple of PMT basis in FCal.
- Harp scans after the beam pass change, then back to Production on Pb target. When do we switch to empty target?
- Thursday 11th: maintenance day starting at 6:30am.
- Solenoid current to be lowered because of cryowork.
- Next pass change (4->3) for Hall C will be Tuesday. They will likely be down for 6h-8h Monday to install their aerogel (unless they run with perfect efficiency, in which case they may
do it Friday. This is very unlikely). So, Monday appears to be auspicious for a TAC run.
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.
- Transmission rates are stable
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
- Today's 5 -> 4 pass change for Hall C is postponed to tomorrow. Consequently, 4 -> 3 pass change next Monday will likely be postponed to Tuesday too (So Monday 15th becomes a good day for a TAC run).
- 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)
- Thursday 11th will probably be a maintenance day.
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).