December 13, 2023

RC Meeting Information

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: https://logbooks.jlab.org/entry/4229331
• RC meeting today

Useful Links

• Shift Signup (Read only)
  • Shift Signup

• Hall-C Controls
• Hall-C Logbook
• MCC White Board
• Daily RC Reports

Current Status

• Production on KinC_x60_2 and _2'.
  • 20.9 ABU in last 24 hours.
• 1036.9 ABU to date on NPS
  • 76.6 Coulomb accumulated
• Succesful BCM calibration yesterday, 13:00 - 15:00

Current Run Plan

• Continue run plan: https://hallcweb.jlab.org/wiki/index.php/Short_Term_Run-Plan
  • cycle KinC_x60_2 then KinC_x60_2'
  • Only need four 1-hour production runs on LD2 for each cycle of each setting.
• Moller today
• Beam off 7:00 am Friday 15 Dec

Notices in Effect for Shift Crew

• All shifts should come in as planned.
• Heidi on vacation 7-13 Dec. Contact Steve L for cryo during that time.
  • cc Heidi & Steve Lassiter on any cryo logbook entry (fansler@jlab.org, lassiter@jlab.org)
• Physically verify green led of gas flow and BCM temps in electronics room
• Record HMS (electron) tracking efficiency from each 50K replay report

Current Issues

• On call list seems incomplete and should be addressed by the Hall: https://logbooks.jlab.org/entry/4230495
• We need other indications of this interlock. In Hall A, we have it shut off detector HV via the alarm handler, and we have a flow rate alarm. Seems the useful PV values have not been working since 1-Sept.
• Need alarm on NPS Sweep (or improved visual display of status).
• NPS PMT/Base failures are propagating into columns 12, 13

Planned Accelerator Configuration Changes

• We will run until 07:00 Dec 15.
  • Target will be warmed up and parked.
  • Hall will remain in Controlled Access until 07:00 Dec 19
  • Beam studies (Day Shift) Dec 19 will send beam into hall
  • Hall will return to Controlled Access at 16:00 on Dec 19

Special Requests

• Moller Dec 13

1. Shutdown repair plan
   1. Remove columns 0-19, start restoration at column 19
      1. Best option for radiation damage.
      2. Either extend shutdown beyond Jan 20 to restore all columns
      3. Or: only restore colulmns 4-19

• NPS Shutdown Checklist for Dec 22-Jan 2 SAD?
  • Turn off HMS magnets (Dec 15)
  • Turn off HMS detector HV (Dec 15)
  • Dec 22
    • Turn off NPS HV
    • Turn off NPS LV
    • Turn off NPS Chiller
    • Turn off VLD (LED controller)