Run Planning Meeting Notes, March 11 - march 15, 2024
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Contents
Saturday, March 16 2024
Past 24 hours
- Smooth running, with rapid accesses for transition radiator configuration changes.
- Test run period ended on March 15th, 23:57.
- Shift Summary
- ABUs: 11.3 h
Issues
Report
Plan
- End of the test run period
- Link to runplan: https://halldweb.jlab.org/wiki/index.php/Run_Coordination_Meetings:Winter2024#Runplan
Friday, March 15 2024
Past 24 hours
- Smooth running. Many rapid accesses for transition radiator configuration changes.
- Shift Summary
- ABUs: 14.5 h
Issues
Report
Plan
- Hall B will work at least until Friday mid-afternoon. There is a possibility of delay until late Monday. We will know by 11am today. Hall D beam will be turned off when Hall B is ready or when we are done with our program. (Shifts manned until midnight only.)
- Data taking with Kr until beam termination later today, perhaps around 4pm shift, maybe later.
- Link to runplan: https://halldweb.jlab.org/wiki/index.php/Run_Coordination_Meetings:Winter2024#Runplan
Wednesday, March 13 2024
Past 24 hours
- Yesterday was efficient (15.5h ABU)
- Photon beam was established and test of the GEM-TRD and GEM started.
- Rapid-access between noon and 14:00 to look at GEM-TRD and GEM.
- Beam back only at 16:40 due to Hall D magnet ramp issue.
- 20:05-20:25 Tagger magnet trip/restoration
- Shift Summary
- ABUs: 15.5 h
Thursday, March 14 2024
Past 24 hours
- Yesterday was a maintenance day 7am-20:40. Beam tuning issues for several hours, up to 1:30am.
- Tagger access to fix the Amo radiator/harp motor issue
- GEM/TRD Ar --> Kr Gas change (14:00-19:00).
- Several rapid accesses in Hall to improve acquisition rate, fix some fiber connections.
- Shift Summary
- ABUs: 7.7 h
Issues
Report
Plan
- Data taking with Kr. Accesses for transition radiator changes?
- Hall B believe they will work until Friday noon. Hall D beam is expected to be turned off at about that time.
- Link to runplan: https://halldweb.jlab.org/wiki/index.php/Run_Coordination_Meetings:Winter2024#Runplan
Wednesday, March 13 2024
Past 24 hours
- Yesterday was efficient (15.5h ABU)
- Photon beam was established and test of the GEM-TRD and GEM started.
- Rapid-access between noon and 14:00 to look at GEM-TRD and GEM.
- Beam back only at 16:40 due to Hall D magnet ramp issue.
- 20:05-20:25 Tagger magnet trip/restoration
- Shift Summary
- ABUs: 15.5 h
Issues
- Amo radiator/harp motor. (Access today to investigate it)
Questions
- Man shifts for Friday swing?
Plan
- Maintenance day 7am-21:00±??
- Morning Tagger access to investigate Amo radiator/harp motor issue.
- Gas change.
- Rapid access to improve acquisition rate.
- Link to runplan: https://halldweb.jlab.org/wiki/index.php/Run_Coordination_Meetings:Winter2024#Runplan
Tuesday, March 12 2024
Past 24 hours
- 6:37 LCW fluctuation tripped PS magnet.
- Hall C pass change completed early afternoon. Then, Ops started to tune hall D beam.
- 17:30 Ops starting to tune beam to Hall D tagger.
- 23:30 Although the first amorphous radiator motion was normal, it got stuck in its way to get retracted.
- Hovanes reduced motor speed to 30% of nominal
- We decided to drop the program on 10-4 and 3×10-4 RL radiators, as well as Ion Chambers threshold calib. on those. We also drop the plan for our Harp scan since it uses the same motor.
- 01:05 radiator motion issue again despite reduced speed
- 03:20 Ion Chamber calibration done (2×10-5 radiator only because of motor issue)
- 05:20 Active Collimator calibration done (high gain only because of radiator motor issue)
- Transmission looks decent: 5kHz rate in the PSC counters compared to expected 8.7kHz for optimal, converging, beam (100 nA, 2×10-5 RL 750um TPOL converter)
- Shift Summary
- ABUs: 0 h
Issues
- Amo radiator/harp motor.
- Notable bleedthrough (unexpected but not an issue?). It is clearly correlated with beam on in Hall C. It seems it was fixed during the night
Questions
- Access to tagger today or Wednesday to look at amorphous radiator/harp motor?
- Man shifts for Friday day/swing?
Plan
- Noon: rapid access (2h, 5 persons) for DAQ and detector work.
- Link to runplan: https://halldweb.jlab.org/wiki/index.php/Run_Coordination_Meetings:Winter2024#Runplan
