RC Meeting and Run Plan, Tues, January 21st 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

• Beam was fairly good over the holiday weekend. After the injector work on Monday owl
• Beam turned off to fix IL20 . During downtime, PNMR worked on and laser alignment checks done.
• Moller measurement on Sat morning. Summary

Current Run Plan

• Take NMR every 5-6 hours
• Always take 120Hz of EDTM
• Hall B will do Moller when beam back. They will do measurement with present IHWP and then flip IHWP.
• Trying to determine when the Moller spin dance will happen.
• DOE tour on Thursday at 11 for 15 minutes. Need to go to restricted access. Radcon to start survey at 10am.

• After beam comes back we have two options:

1.If the target polarization is good

• we will continue with the present kinematics with the polarized target. Run plan for high momentum 30 deg polarized helium

2.If the target polarization needs time to increase

• We will do the cross section study with 3He reference cell
  • See Run Plan
  • This is about 5 hours of 30uA beam
  • Will need to cycle magnets to go back to HMS/SHMS at -3.5/-3.4 GeV/c.
• If the target polarization still needs time to increase
  • we will do part of the reference cell empty,N2 and H2 running for HMS/SHMS at -3.5/-3.4 GeV/c.
  • See RUn plan
  • This is about 6 hours of 30uA beam
• Otherwise more data with the polarized target. Run plan for high momentum 30 deg polarized helium

Special Requests

• Keep target expert schedule filled out on whiteboard
• Andy Kenyon has parts ready for the nitrogen for the cooling jets.= Ongoing Work in the Hall

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
  • 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[1]
• Temporary Laser instructions can be found here [2]