RC Meeting and Run Plan, Thu, January 30th 2020
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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
- Smooth data taking on pol He (L and T) and Reference cell (He 73 psi)
- Hall A down because of beam excursions on "that" target (possibly due to FFB and Compton and Target orbit locks interference)
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
Thursday swing – Friday 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 !! !! !! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
- Run plan: https://logbooks.jlab.org/entry/3774132
- General idea: take 4–5 hours transverse data to get polarization up, then ~10 hours longitudinal data
Future
Moller & spin dance
- Spin dance on the WB for Wednesday nest week. Jian-Ping may like to keep Wednesday for target cell replacement. Let's talk...
Hall Access
- None planned right now
When there is an access:
- Replace the EPR fiber bundle (Jian-Ping)
- Fix SHMS Q3 current lead valve (Steve Lassiter) - 8 hours
- SHMS rotation controller check/power cycle? (Steve Lassiter)
- not an access but downtime (reboot skyla10)
Target cell replacement
- 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.
- Spectrometer GUI (
- 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]
- Do not change SHMS momentum until we fixed the current lead valve
