Difference between revisions of "Run Planning Meeting Notes, March 11 - march 15, 2024"
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* 23:30 Although the first amorphous radiator motion was normal, [https://logbooks.jlab.org/entry/4265142 it got stuck in its way to get retracted.] | * 23:30 Although the first amorphous radiator motion was normal, [https://logbooks.jlab.org/entry/4265142 it got stuck in its way to get retracted.] | ||
** Hovanes reduced motor speed to 30% of nominal | ** Hovanes reduced motor speed to 30% of nominal | ||
| − | ** We decided to drop the program on 10<sup>-4</sup> and | + | ** We decided to drop the program on 10<sup>-4</sup> and 3×10<sup>-4</sup> 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 [https://logbooks.jlab.org/entry/4265328 radiator motion issue again despite reduced speed] | * 01:05 [https://logbooks.jlab.org/entry/4265328 radiator motion issue again despite reduced speed] | ||
| − | * 03:20 Ion Chamber calibration done ( | + | * 03:20 Ion Chamber calibration done (2×10<sup>-5</sup> radiator only because of motor issue) |
* 05:20 Active Collimator calibration done (high gain only because of radiator 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<sup>-5</sup> RL 750um TPOL converter) | ||
| − | *MCC Harp scans: [https://logbooks.jlab.org/entry/4265217 5C00], [https://logbooks.jlab.org/entry/4265288 5C11], [https://logbooks.jlab.org/entry/4265289 5C11b] | + | *MCC Harp scans: [https://logbooks.jlab.org/entry/4265217 5C00], [https://logbooks.jlab.org/entry/4265288 5C11], [https://logbooks.jlab.org/entry/4265289 5C11b]. They are decent. |
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| − | * ABUs: | + | * ABUs: 0 h |
<!-- * Data Summary: B triggers on empty target --> | <!-- * Data Summary: B triggers on empty target --> | ||
Revision as of 08:21, 12 March 2024
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 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
