Run Planning Meeting Notes, September 8 - September 14, 2022

Meetings are via ZoomGov: connect (Meeting ID: 160 199 0060 / Passcode 8394)

MCC whiteboard

Hall D counting room white board

Hall D Logbook

Back to Run Coordination Meetings:Fall2022

Tuesday, September 13

Past 24 Hours

• TAC run
• Empty target production @200nA
  • Total triggers collected
• Shift summaries:
  • 0400-1000 13/09
  • 2200-0400 12/09-13/09
  • 1600-2200 12/09
  • 1000-1600 12/09
  • 0400-1000 12/09

Issues

• spontaneous saturation of active collimator adcs during TAC run
• More data on LCW Temperature variations

Plan

• Empty Target running
• Maintenance day tomorrow
  • Beam off around 6:30AM, restored during swing shift (~8PM)

Monday, September 12

Over the Weekend

• Production data at 200nA on the liquid He target.
  • 12.8B total triggers collected on LHe target (started Thursday morning)
• Active collimator checkout at 2nA beam current.
• Timing calibrations updated by Sean
• Beam was down for ~5hours early Monday morning. We took raw cosmics data during this time:
  • Run numbers: 110721-110723 (9.8M events)
• Beam down for ~1hour Saturday during swing shift, took cosmics run:
  • Run number: 110701 (2.5M events)
• Shift summaries:
  • 0400-1000 12/09
  • 2200-0400 11/09-12/09
  • 1600-2200 11/09
  • 1000-1600 11/09
  • 0400-1000 11/09
  • 2200-0400 10/09-11/09
  • 1600-2200 10/09
  • 1000-1600 10/09
  • 0400-1000 10/09
  • 2200-0400 09/09-10/09
  • 1600-2200 09/09
  • 1000-1600 09/09
  • 0400-1000 09/09

Issues

• FCAL Bases:
  • Had to reset a few bases throughout the weekend using standard procedure. One base (35,5) was not responding to power-reset and Malte will investigate next access.
  • Another base not holding HV and needs to be replaced next access
• CDC AI turned off per Naomi's request.

Plan

• Empty Target, take TAC Run
• Continue taking empty-target data until Maintenance day on Wednesday

Friday, September 9

Past 24 hours

• Production data at 200nA on the liquid He target.
  • 2.7B total triggers collected last 24 hours
• Trigger studies and rate scan performed by Sasha
  • Added low-threshold trigger for FCAL (0.5GeV Trigger threshold)
  • 2 noisy FCAL channels were masked
• FCAL HV Scan with solenoid field on
• Beam stability on the active collimator (Beni)
• Shift summaries:
  • 0400-1000 09/09
  • 2200-0400 08/09-09/09
  • 1600-2200 08/09
  • 1000-1600 08/09
  • 0400-1000 08/09

Issues

• Beam was unavailable for about 1 hour during the day shift due to Hall C's BCM calibration. We correlated the FCAL HV scan with this downtime.
• Minor issue with one shift worker not showing up. Thanks to Karthik for taking that role on short notice.
• EA LCW Oscillations giving rise to vertical orbit excursions in Hall D Beam
• Trigger Timing change noted by Beni

Plan

• Continue taking production data at 200nA.
  • Production runs at small intensity (50nA and 100nA) over the weekend?
• PrimEx Run Plan

Thursday, September 8

Past 24 hours

• Maintenance day
• Work done in hall:
  • Removed Be target, Installed He target and ramped magnet:
  • Fixed connection for missing channels in ST:
  • Replaced FCAL bases & one PMT (Malte): [1], [2]
• LHe Target full and ready after ~11 hours, [3] (Chris Carlin)
• Extrapolations from harp scans
• FCAL HV Correction for outliers (Igal)
• 308M Triggers collected while target was filling and solenoid ramping.
• 404M Triggers collected with target full and solenoid ramped.
• Shift Summaries:
  • 0400-1000 08/09
  • 2200-0400 07/09-08/09
  • 1600-2200 07/09
  • 1000-1600 07/09
  • 0400-1000 07/09

Issues

• FDC-RF selftiming peak is missing
  • Hall C will do BCM calibrations this afternoon, coordinate access to fix FDC TDCs with this?

Plan

• Rate+Trigger Studies (Sasha)
  • Trigger rate studies on Beryllium
  • Trigger rate scan (Be)
• Begin(continue) production on LHe Target @200nA
• Wednesday, 9/14: MCC plans to open the tunnel with the goal to bring up as much RF as possible. They plan to spend ~1.5 shifts for this.