RC Meeting and Run Plan, Mon, January 27th 2020

From HallCWiki
Revision as of 16:49, 27 January 2020 by Jmatter (Talk | contribs) (Other)

Jump to: navigation, search

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:
 To join via Room System:
 Video Conferencing System: bjn.vc -or-
 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


  • Saturday: solid data (after 2AM SHMS dipole trip)
  • Sunday: SHMS Q3 tripped
    • Might be mass flow controller, which would be a "quick" fix.
    • Worst case scenario could be a blockage that requires warming the magnets up.


  • Moller during day shift

Recent polarization measurements

Didn't have time to compile this today :(

Beam checkout

Current Run Plan

  • Always take 120Hz of EDTM

Monday swing – Tuesday day

!!                                                     !!
!!  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       !!
!!                                                     !!


Moller & spin dance

  • Finally took measurement today! (No spin dance)
  • Moller + spin dance on Tuesday 2/4? Are there beam studies scheduled for 1/28?

Hall Access

  • Thursday morning
    • SHMS Q3
    • EPR fiber bundle, maybe laser alignment
    • SAF112 walkthroughs with Joe at 9AM on Thursday
    • PSU (under pivot) for polhe3 rack camera and hcreboot5 needs to be manually power cycled [1]
      • "hcreboot5 has a number of the target controls on it as well [which?] so we won't be able to power cycle those remotely either until this is done." - Brad


  • Replace target cell in ~1 week
  • In the event that the SHMS dipole trips again, take a screenshot of the PSU window before resetting the interlock and post it to hclog.

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
    • 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.
  • 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[2]
  • Temporary Laser instructions can be found here [3]

Planned Accelerator Configuration Changes