RC Meeting and Run Plan, Monday, February 3rd 2020

RC Meeting Information

RC Daily Meetings are at 4:15 PM, 2nd floor Counting House Meeting Room

• 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

• Main Pol He-3 wiki
• Shift Schedule
• Hall-C Controls
• Hall-C Logbook
• MCC White Board

General updates

• Smooth data taking on pol He (L and T) except for beam strike in C line on Friday and Arc 8 power supply issues on Sunday
• Hall C spin dance done: https://logbooks.jlab.org/entry/3776854
• Saturday: https://logbooks.jlab.org/entry/3775400
• Sunday: https://logbooks.jlab.org/entry/3776121
• Monday: https://logbooks.jlab.org/entry/3776734

Recent polarization measurements

• https://logbooks.jlab.org/entry/3776831

Current Run Plan

• Always take 120Hz of EDTM

Thursday swing – Friday day

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!                                                     !!
!!  ATTN: SHIFT LEADERS                                !!
!!     Please follow the shift summary template on     !!
!!     the laminated SL instructions.                  !!
!!                                                     !!
!!  ATTN: TARGET OPERATORS                             !!
!!  All NMR measurement HCLOG entries should include:  !!
!!     1) A title that clearly lists polarization      !!
!!     2) Screenshots of both NMR_FieldSweep and       !!
!!        the polarization fit                         !!
!!                                                     !!
!!     For an example see the following entry:         !!
!!     https://logbooks.jlab.org/entry/3768696       !!
!!                                                     !!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

• General idea: take 6 hours transverse data to get polarization up, then 10 hours longitudinal data

Future

• Replace target cell at some point
• In the same access: Replace the EPR fiber bundle (Jian-Ping)

Hall Access

• Tomorrow to fix the SHMS Q3 valve
• SHMS rotation controller

When there is a down:

• reboot skyla10

Special Requests

• Keep target expert schedule filled out on whiteboard

Notices in Effect for Shift Crew

• Policy for CANS-related hall status change: Make a logbook entry when the hall goes in, or comes out of laser-controlled access.
  • Good examples for entering and leaving laser access.
• Magnet policies
  • Spectrometer GUI (go_magnets) should always be visible on Shift Leader computer, hcdesk3
  • HMS Q1 must be ramped down in 50A steps in all cases
  • Do not ramp HMS Q2 to zero, only go to 10A and then switch off power.
  • If SHMS dipole trips again, take a screenshot of the PSU window before resetting the interlock and post it to hclog.
• Inform the RC of any access that the Target Team requires. The RC will coordinate with RadCon to make everything run smoothly.
• The operators have been somewhat careful with our beam orbit locks. Please make sure that the orbit locks are enabled and the beam does not drift from its nominal position.
• Ramp rate lock instructions are here and added to checklist[1]
• Temporary Laser instructions can be found here [2]
• Do not change SHMS momentum until we fixed the current lead valve