Difference between revisions of "RC Meeting and Run Plan, Fri, January 24th 2020"
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=== Moller & spin dance === | === Moller & spin dance === | ||
| + | * Reminder: we only have one measurement so far from Saturday 1/18 | ||
* Tentatively Monday morning, pending Hall A | * Tentatively Monday morning, pending Hall A | ||
* Hall B strongly encourages us to push it back to the 30th (because it won't matter to them at that point and they currently have priority) | * Hall B strongly encourages us to push it back to the 30th (because it won't matter to them at that point and they currently have priority) | ||
Revision as of 16:16, 24 January 2020
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
- Silviu posted a simulation of glass cell window response to raster breathing rate [1]
- JP posted the procedure for moving from transverse to longitudinal polarization [2]
Thursday swing – Friday owl
- 4:30PM: Cryo problems resolved
- 6PM – 8PM: Beam restoration and steering
- 8PM – midnight: Took about 4 hours of good transverse data
- Midnight: Arc dipole trips again.
- Resolved at 8AM Friday
- PD says this was a loose wire, which has been taken care of [3]
Thursday day
- Several SHMS dipole trips during Day Shift
- MCC had some trouble getting width even below 500 um during Friday Day shift, but we ended up at 469um
- MCC seems to have some trouble delivering 30uA to us at the same time as Hall A's 150 uA
- Injector work in the morning
- 1PM Start beam checkout
- 3PM Taking transverse polarization data
Recent polarization measurements
Trans 51% 2PM Thu [6] Trans 61% 7PM Thu [7] Trans 63% 12AM Fri [8] Trans 66% 6AM Fri [9] Long 63% 10AM Fri [10] Long 57% 2PM Fri [11]
Beam checkout
- I wrote a script for projecting beam width to target [12]
- I'm updating the short checkout procedure wiki
- Harp scan with tune beam and no target
- My script is helpful here
- YAG screenshot with and without raster, tune(?) beam, no target
- Verify raster off spot looks round (not like a comet, no weird tails)
- Verify raster on beam looks like a circle
- This will interrupt the other halls' beam
- Check beam positions with 30 uA CW beam, no target
- Mask FSD, move target, start taking data
- Harp scan with tune beam and no target
Current Run Plan
- Always take 120Hz of EDTM
Thursday swing – Tuesday day
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !! !! !! 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 !! !! !! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
- Polarized 3He target
- We're taking transverse data now
- And over the weekend?
Moller & spin dance
- Reminder: we only have one measurement so far from Saturday 1/18
- Tentatively Monday morning, pending Hall A
- Hall B strongly encourages us to push it back to the 30th (because it won't matter to them at that point and they currently have priority)
Future
- Open enclosure early next week, maybe Tuesday 1/28
- Check longitudinal laser setup
- Install the rotation stages?
- Install EPR fiber bundle?
- Check to see if there's any scheduled downtime that we can use for this
- Arun tentatively getting replacement cell prepared early next week; install it in two(?) weeks?
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
- 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[15]
- Temporary Laser instructions can be found here [16]
