RC Meeting, Friday, September 23, 2021

RC Meeting Information

RC Daily Meetings are at 10 am, remote

• Bluejeans remote connection information:

 To join the Meeting:
 https://bluejeans.com/861439920
 To join via Room System:
 Video Conferencing System: bjn.vc -or-199.48.152.152
 Meeting ID : 861439920
 To join via phone :
 1)  Dial:
   +1.408.740.7256 (US (San Jose))
   +1.888.240.2560 (US Toll Free))
   +1.408.317.9253 (US (Primary, San Jose))
   (see all numbers - http://bluejeans.com/numbers)
 2)  Enter Conference ID : 861439920

Useful Links

• Fall 2021 Shift Schedule
• Hall-C Controls
• Hall-C Logbook
• MCC White Board

Wednesday Status

1. Good beam throughout swing and overnight.
2. Two short interruptions:
   • Hall C (~8am) SHMS Q3 interlock (thermal breaker/fuse)
   • Hall D (~3am) ion chamber board:
3. LN2 at HMS Q1 is low (generating warning): https://logbooks.jlab.org/entry/3911064
   • No action taken, until Hati came at 7:30am (refill started). Paying attention to the ice ball formation
4. Hall Camera glitch: https://logbooks.jlab.org/entry/3910814
   • Reboot instruction by Brad (will be done during the SHMS moving on Monday).

Current Run Plan

1. Q2=6 GeV left setting until Monday
   • FACDMODE10 data taken
   • Dummy target run daily.

Current Issues

• Once beam was back today, a x10 amp was added to the Noble Gas Cherenkov signals and PMT gains re-matched. A quick check of the eff. showed a large improvement: new https://logbooks.jlab.org/entry/3906282 vs old https://logbooks.jlab.org/entry/3905847.

Special Requests

• MCC has been notified that we will require a beam energy measurement at this pass. Hopefully good beam this weekend and then we can ask for this to be done on Monday day.