RC Meeting and Run Plan, Tue, January 29th 2020
From HallCWiki
Contents
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
General updates
- We are in the second half of the longitudinal polarization run (we did and NMR measurement ~12:54 - https://logbooks.jlab.org/entry/3773442). We will do another NMR measurement at 6 pm and then go to transverse polarization running. After 5 h of running in the transverse polarization configuration we will do another NMR and switch to longitudinal running. If the NMR measurement done before the transverse polarization running was 47 % or higher we will stay in the next longitudinal configuration running for 12 h.
Recent polarization measurements
Long 51.5 % 12:54PM Wed 1/29 Mid way through the long polarization running period 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
Wednesday swing – Thursday 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/3773531
- General idea: take 5-6 hours of transverse data to get polarization up, then 10-12 hours longitudinal data
Future
Moller & spin dance
- Spin dance will be part of beam studies. At the scheduling meeting today it was proposed Wednesday next week as spin dance day.
Hall Access
- None planned right now
Other
- 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 momentum in SHMS: Q3 right current lead valve needs to be fixed
