RC Meeting and Run Plan, Tue, January 28th 2020

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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

General updates

Monday Swing – Tuesday Owl

  • 4PM to 10PM production data
  • 10PM beam down
  • 7AM beam back, taking data

Tuesday Day

  • 9AM down again to replace chopper amplifier causing beam instability [1][2]
    • Video of beams on chopper blinking [3] (mostly B, but also visible in A and C)
  • Controlled access from 9 to noon
    • Survey [4]
    • Steve and Andy went down to check out SHMS Q3 at 9:15.
      • No fixes today. Need to replace the valve, which will be ~8 hours.
      • Thursday? When we replace the target cell in a week?
    • Brad rebooted PSU
    • Larry (with RadCon) grabbed some tools at 11:00
    • Joe Beaufait went down at 11:45 to take some pictures for a talk on infrastructure ("water, power, yada yada yada")
  • As of 2PM, no beam.

Recent polarization measurements

 Trans  55%  10AM Tue 1/28   Rotated back to transverse because accelerator is down
 Long   56%   9AM Tue 1/28   After taking longitudinal data 
 Trans  61%   7AM Tue 1/28   After taking transverse data
 Long   51%  11PM Mon 1/27   After taking longitudinal data
 Trans  63%   3PM Mon 1/27   After taking transverse data
 Long   49%   8AM Mon 1/27   After taking longitudinal data
 Trans  57%   2AM Sun 1/26   After taking transverse data

Current Run Plan

  • Always take 120Hz of EDTM

Tuesday swing – Wednesday 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       !!
!!                                                     !!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Future

Moller & spin dance

  • Spin dance will be part of beam studies. No word on when it'll happen, other than when the PD schedules it.

Hall Access

  • Thursday morning
    • EPR fiber bundle, maybe laser alignment
    • SAF112 walkthroughs with Joe at 9AM on Thursday
    • SHMS Q3?

Other

  • Replace target cell in ~1 week

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.
  • 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[5]
  • Temporary Laser instructions can be found here [6]

Planned Accelerator Configuration Changes