Run Planning Meeting Notes, March 11 - march 15, 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 Colimator calibration done (high gain only because of radiator motor issue)

• MCC Harp scans: 5C00, 5C11, 5C11b

• Shift Summary
  • Day Monday
  • Swing Monday
  • Owl Tuesday

• ABUs: 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