December 9, 2023

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RC Meeting Information

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

Useful Links

Current Status

  • Production on KinC_x60_2 and _x60_2'.
  • Friday 15:30 Escorted access to survey and remove cables during HMS Dipole down to close valve in LERF resposible for LHe
    • 16:00 forgot to restore NPS Sweep magnet after Escorted Access. 2 hours of beam with sweep off
  • 19:00 yesterday, lost Separator. No Beam. No MCC staff overnight for repairs.
    • Sat 9Dec23 OWL SL cancelled
    • All shifts still on for Sat Day
  • 07:00 Separator repair work started. MCC estimate 2 hours

Current Run Plan

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 on any cryo logbook entry (fansler@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.
  • NPS PMT/Base failures are propagating into columns 9, 10, 11, 12


Planned Access to the Hall

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

  • Plan for Moller Dec 13 or 14 (single HWP setting)