Simona's parting notes

RC Meeting Information

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

Wed. Aug 5 2020.

• No beam to Hall C since the storm down
• Our counting house was staffed on the promise of getting beam; we've seen not even one squirt since Aug. 4th 1 am!
• Here is a link to my RC report for the 1:30 meeting which clearly shows that Hall C is not given the priority it needs
• After discussions between RC and spokespeople and then spokespeople and the Hall leader and then Hall leader and PD the plan is for Ops to finish up 1 pass beam delivery to B (2 shifts), do the pass change for B (and A), establish the 5 pass machine by delivering beam to Hall C - 30 muA stable and to B and D ans then bring A on line.

General updates

• On the hall side all looks good

Pending problem

• No beam

Recent polarization measurements

• Target polarization looks great: https://logbooks.jlab.org/entry/3820866

Current Run Plan

Normal Production running

• Prerequisites

• Make sure operational restrictions are followed.
• Make sure the raster size is correct (4-4.5)
• 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 (4-4.5, 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 every 4 hours when running on glass cells

• Run plan

• Harp scans with 3H07 A and B
• If profile looks good, production on 3He

Notes for tomorrow's 7:45 meeting

• C has priority over A per Thia's e-mail
• C needs 30 muA now

Future

• After ~ 10 days of running Hall C will go to 1 pass for ~3 days

Hall Access

• Tuesday is maintenance day on the Ops side; perfect time for me and the techs to remove the SoLID Cher detector package from between the HMS and beamline

When there is a down:

• If the down is 2+ hours call Simona: she will check with the RC to see if there is an opportunity for work in the Hall (SoLID Cherenkov parasitic test)

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 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[1]

Planned Accelerator Configuration Changes

• 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:
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   +1.888.240.2560 (US Toll Free))
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   (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