February 27, 2024

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 connection link: https://jlab-org.zoomgov.com/j/1617015555?pwd=L09IQ216dml6ZmM5ODExVjFsMX
• Meeting ID: 161 701 5555
• Passcode: 288953

Useful Links

• Shift Signup (Read only)
  • Shift Signup

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

Hall status

• DIS singles data for LH2, LD2, Dummy. Carbon data need to be taken before switching to the Positron data taking
• BCM calibrations:
  • Plan: [1]
  • https://logbooks.jlab.org/entry/4257267 (Faraday cup measurments)
  • https://logbooks.jlab.org/entry/4257273 (BCM calibrations)
• Took 2x30min LH2 data at 16uA
  • Could we increase the LH2 production to 16uA?
• Completed second production data cycle (first one with 8uA on LD2)

• NPS crate temperatures:
  • Bill added them to MUNIN: https://hallcweb.jlab.org/munin/crates_det-day.html
  • Temperature readings around ~95F for crate #4
  • Escorted access: Confirmed AC working, Placed box fans for crate #2 and #4 (https://logbooks.jlab.org/entry/4257294)
  • Asked facilities to set AC from 68F -> 65F
  • SHMS hut temperature sensor to be replaced on Wed during the access
  • Hall temperature reading frozen: https://logbooks.jlab.org/entry/4257295
  • Ben will add FPGA temperature readings to DAQ info

Accelerator status

• West arc box supplies dropped off at 7am, downtime for ~2.5h
• Maintenance + Beam study on Wednesday
  • Beam off at 7am
  • Maintenance till around noon
  • Beam study till 21:00pm
  • Beam to the halls, ~22:30pm
  • Scheduled can be shifted a bit if the maintenance work finished earlier

Planned Access to the Hall

Controlled access. RadCon full survey starts around 9am.

• NPS: Julie, Josh, Aaron to look at the temperature read back issue (3 keys almost whole access?)
• Walk-thru at 1pm: Joe + 5 FIU students (6 keys)
• Heidi: checking Dipole, needs one hour
• Bill: SHMS hut temperature sensor replacement

Current Run Plan

• Short-term run plan: https://hallcweb.jlab.org/wiki/index.php/Short_Term_Run-Plan
  • KinC_x36_6, NPS at 7.5 deg, calorimeter at 6m
  • Remaining Carbon DIS data taking at 13:00pm today
  • Followed by Positron data taking, until tomorrow 7am
  • Moller measurements on Thursday?

Notices in Effect for Shift Crew

• IHWP change instruction: https://hallcweb.jlab.org/wiki/index.php/Hall_C_IHWP_Change_Procedure
• BTA with low current - https://logbooks.jlab.org/entry/4256075
  • Helper script: go_bta_config

Current Issues

• NPS crate #2 drops occasionally
  • Not much reported recently, taking 30min runs (restarting a new run more often) seems helping
• NPS crate temperatures

Special Requests

• Guard house work till Friday. Pay attention to the sign and follow the directions around there when coming to the accelerator site.