RC meeting and Run Plan, Monday February 20th

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RC Report


  • Beam recovery was completed by 5am today
  • We had ~45 uA beam until BLA for hall D took beam off
  • Total charge collected over last seven shifts is just 1.7C due to the fire event and accelerator problems


  • DAQ recovery procedure is still a big puzzle
  • Coordination of the "experts on call" - e.g. TH needs improvement
  • Beam trip rate is high and beam position moves a lot

Current Status

  • Production on He-3 target when beam is available

Run Plan

  • Continue running 45 uA on He3
  • Accelerator will prioritize beam and not have any maintenance days this week

Data Collection and Polarization Status

  • 37.7C of uncorrected charge for this kinematic (43.3C of corrected charge which is 28% of the plan)
  • Last NMR 51.4%

Other Topics/Status Updates

  • 8 Target Operator Shifts need to be taken
  • Bill wants to change the raster settings after some analysis

Requested Accesses to the Hall

  • Todd need to switch a gas bottle on GRINCH
  • Jack would like to collect some cables