October 5, 2023

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RC Meeting Information

Current RC: Iuliia Skorodumina

RC Daily Meetings are at 11:00 (am) via Zoom and in person in the counting house meeting room (2nd floor)

Zoom remote connection information:
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Useful Links

• Shift Signup (Read only)

• Hall-C Controls
• Hall-C Logbook
• MCC White Board

Summary

Wednesday (10/03) Day, Swing and OWL this morning shifts we were smoothly taking production data on LH2, LD2, and dummy (

Middle Swing we had Q1 trip when the NPS magnet was powered off before ramping to zero [1] The current plan is to continue running at the KinC_x50_2 production setting. We need to stay at this setting for the total of ~2 days of running.

1. KinC_x50_2 "cycle", SPARSIFICATION ON (CODA Configure coin_sparse)
   1. LD2 target
      1. One hour run on LD2, ps6=0, 15 uA (0.03 C)Complete Runs 1614-1623
      2. Expert login to nps-vtp1:nps-vtp/cfg/coin_sparse. cp nps-vtp.cfg_narrow_sparse_window nps-vtp.cfg
      3. One hour run on LD2, ps6=0, 15 uA (0.03 C)
         1. Expert analyze for any differences in previous two runs
      4. One hour run on LD2, ps6=0, 15 uA (0.03 C)
      5. NPS Sweep Magnet OFF 30 min run LD2 ps6=0 15 uA
      6. NPS Sweep ON 468 Amp, Correctors off
      7. Efficiency run, 30 min LD2 15 uA , ps3=5 or as necessary for ≤ 2 kHz trigger rate to CODA
   2. LH2 Target
      1. One hour run on LH2, ps6=0, 30 uA (0.06 C)
      2. Expert login to nps-vtp1:nps-vtp/cfg/coin_sparse. cp nps-vtp.cfg_wide_sparse_window nps-vtp.cfg
      3. One hour run on LH2, ps6=0, 30 uA (0.06 C)
      4. Expert login to nps-vtp1:nps-vtp/cfg/coin_sparse. cp nps-vtp.cfg_narrow_sparse_window nps-vtp.cfg
      5. One hour run on LH2, ps6=0, 30 uA (0.06 C)
      6. Efficiency Run 30 min LH2 30uA, ps3=4 or as necessary for ≤ 2 kHz trigger rate to CODA (0.03 C)
   3. 30 min run on Dummy at 30 uA (0.03 C), ps6=0
   4. Three 1-hour runs on LD2, ps6=0, 15 uA (0.09 C total)

• Wednesday Swing, Thurs Owl

1. KinC_x50_2 "cycle", SPARSIFICATION ON (CODA Configure coin_sparse)
   1. Three 1-hour runs on LD2, ps6=0, 15 uA (0.09 C)
   2. Efficiency run, 30 min LD2 15 uA , ps3=5 or as necessary for ≤ 2 kHz trigger rate to CODA (0.03 C)
   3. Three 1-hour run on LH2, ps6=0, 30 uA (0.06 C)
   4. Efficiency Run 30 min LH2 30uA, ps3=4 or as necessary for ≤ 2 kHz trigger rate to CODA (0.03 C)
   5. 30 min run on Dummy at 30 uA (0.03 C), ps6=0
   6. Three 1-hour runs on LD2, ps6=0, 15 uA (0.09 C)

Run plan

The run plan is available here: https://hallcweb.jlab.org/wiki/index.php/Short_Term_Run-Plan

Note the simplified table of the upstream and downstream corrector currents vs. SHMS angle uploaded by Dave Gaskell. The shift workers should be able to use this table to provide starting values for the corrector currents when MCC executes the NPS sweeper setup procedure at a new configuration.

Future plans

• We need to stay at KinC_x50_2 production setting for the total 3 days of running.
• Moller measurement.
• Access today to install new "26 deg wings" on the Sweep Magnet.
• Maintenance day next Wednesday. Walk-thru on the schedule