Difference between revisions of "RC Update and Run Plan for Aug 20, 2020"

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(Current Run Plan)
(Notices in Effect for Shift Crew)
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* Policy for CANS-related hall status change: Make a logbook entry when the hall goes in, or comes out of laser-controlled access.
 
* 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 [https://logbooks.jlab.org/entry/3747393 entering] and [https://logbooks.jlab.org/entry/3747544 leaving] laser access.
 
** Good examples for [https://logbooks.jlab.org/entry/3747393 entering] and [https://logbooks.jlab.org/entry/3747544 leaving] laser access.
 +
* Inform the RC of any access that the Target Team requires. The RC will coordinate with RadCon to make everything run smoothly.
 +
* 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[https://logbooks.jlab.org/entry/3753633]
 +
* An new reference Cell refill procedure: [https://hallcweb.jlab.org/wiki/index.php/Polarized_Helium-3_Experiments#Pol_He-3_Target_Information New procedure]
 
* Magnet [https://hallcweb.jlab.org/wiki/index.php/How_to_operate_and_monitor_the_Spectrometer_Magnets policies]
 
* Magnet [https://hallcweb.jlab.org/wiki/index.php/How_to_operate_and_monitor_the_Spectrometer_Magnets policies]
 
** Spectrometer GUI (<code>go_magnets</code>) should always be visible on Shift Leader computer, hcdesk3
 
** Spectrometer GUI (<code>go_magnets</code>) should always be visible on Shift Leader computer, hcdesk3
 +
** Slow ramping procedure of the SHMS, go small steps to the MOL, [https://logbooks.jlab.org/entry/3831559 an great example] (1 hour 30 min process)
 
** HMS Q1 must be ramped down in 50A steps in all cases
 
** 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.
 
** Do not ramp HMS Q2 to zero, only go to 10A and then switch off power.
 
** If any of the Spectrometers magnets trip, take a screenshot of the PSU window and check the hall for smoke or water with the camera '''before''' resetting the interlock and post it to hclog.
 
** If any of the Spectrometers magnets trip, take a screenshot of the PSU window and check the hall for smoke or water with the camera '''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.
 
* 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[https://logbooks.jlab.org/entry/3753633]
 
 
  
 
= Planned Accelerator Configuration Changes =
 
= Planned Accelerator Configuration Changes =

Revision as of 15:06, 20 August 2020

Back to the precious page

RC Meeting Information

RC Daily Meetings are at 4:15 PM, remote

General updates

  • Todd's Access, He3 refill
  • Reference cell run
  • Magnet polarity change
  • Moller

Pending problem(s) / Things to track

Recent polarization measurements

  • OWL (08/20) 2:30 - 29%
  • OWL (08/20) 12:20 - 10%
  • OWL (08/20) 14:51 - 19.5%

Current Run Plan

Normal Production running

  • Prerequisites
    • Make sure the raster size is correct (4--4.5mm)
    • Monitor beam parameters/configuration very often and post an entry like this at the beginning of your shift and when run conditions have changed
    • Running on cell targets: raster always ON (4--4.5mm, size will be determined by the scraping checks), orbit locks ON, current ramp rate 1 muA/sec
    • Always take 120Hz of EDTM
    • Fill the BTA with realistic numbers. If the desired beam current is not delivered prorate your ABUs!
    • Change the IHWP at least every 8 hours when running on glass cells. If Hall A hasn't changed in 8 hours, call the RC
  • Run plan
    • Complete the Moller measurement (still 4-6 hours of work remain), while keeping an eye on the target polarization.

Notices in Effect for Shift Crew

  • Follow all COVID rules and regulations as well as remind each other.
  • Beam positions: [1]
  • Policy for CANS-related hall status change: Make a logbook entry when the hall goes in, or comes out of laser-controlled access.
  • Inform the RC of any access that the Target Team requires. The RC will coordinate with RadCon to make everything run smoothly.
  • 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]
  • An new reference Cell refill procedure: New procedure
  • Magnet policies
    • Spectrometer GUI (go_magnets) should always be visible on Shift Leader computer, hcdesk3
    • Slow ramping procedure of the SHMS, go small steps to the MOL, an great example (1 hour 30 min process)
    • 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 any of the Spectrometers magnets trip, take a screenshot of the PSU window and check the hall for smoke or water with the camera before resetting the interlock and post it to hclog.

Planned Accelerator Configuration Changes

  • Hall C to 1st pass on 8/31 and back to 5th pass on 9/03


  • Bluejeans remote connection information:
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 Meeting ID : 861439920
 To join via phone :
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 2)  Enter Conference ID : 861439920