December 11, 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'.
• Saturday 09 Dec: 07:00-09:00 Separator repair work. Beam restored to HallC ~ 09:30
• Sunday 10 Dec: HMS Q3 & Dipole tripped at 11:19 (run 3510) Restored directed to set points (Run 3511, 3512) Ramped to MOL and back to set point at 14:00

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.

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.
• NPS PMT/Base failures are propagating into columns 9, 10, 11, 12
• Calo Temp sensor interface failed yesterday around 16:30.
  • Remote restart by Aaron Brown not successful
  • Access to Hall, Unplugged and replugged AC power https://logbooks.jlab.org/entry/4232489
  • Beam recovery took another ~2 hours

Planned Access to the Hall

• perhaps opportunistic access Monday to disconnect some noisy signal cables to FADC from empty channels.

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)
• Calorimeter energy resolution studies
  • Analyze pi0 mass resolution as a function of pi0 energy
  • Analyze pi0 mass resolution separately for high current and low current runs