RC Meeting and Run Plan, Tue, January 28th 2020
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Revision as of 15:16, 28 January 2020 by Jmatter (Talk | contribs) (→Recent polarization measurements =)
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
Monday Swing – Tuesday Owl
- 4PM to 10PM production data
- 10PM beam down
- 7AM beam back, taking data
Tuesday Day
- 9AM down again to replace chopper amplifier causing beam instability [1][2]
- Video of beams on chopper blinking [3] (mostly B, but also visible in A and C)
- Controlled access from 9 to noon
- Survey [4]
- Steve and Andy went down to check out SHMS Q3 at 9:15.
- No fixes today. Need to replace the valve, which will be ~8 hours.
- Thursday? When we replace the target cell in a week?
- Brad rebooted PSU
- Larry (with RadCon) grabbed some tools at 11:00
- Joe Beaufait went down at 11:45 to take some pictures for a talk on infrastructure ("water, power, yada yada yada")
- As of 2PM, no beam.
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
Tuesday swing – Wednesday 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/3772076
- General idea: take 4–5 hours transverse data to get polarization up, then ~7 hours longitudinal data
Future
Moller & spin dance
- Spin dance will be part of beam studies. No word on when it'll happen, other than when the PD schedules it.
Hall Access
- Thursday morning
- EPR fiber bundle, maybe laser alignment
- SAF112 walkthroughs with Joe at 9AM on Thursday
- SHMS Q3?
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[5]
- Temporary Laser instructions can be found here [6]