RC Meeting and Run Plan, Thursday, December 5th 2019
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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
Notices
- Policy for CANS-related hall status change: Make a logbook entry when the hall goes in or comes out of laser-controlled access.
- Make sure beam-size is between 200-300um
- Still many TO day/swing shifts available! You don't need TO training, and will be guided on-site by the target experts!
- Raster: Will need to mask MIN raster current in FSD when running 1-2 pass, ask PD if we need permission/signature from someone.
- UPDATE: William set min current alarm value to 0, effectively disabling the alarm. Unfortunate side effect is that we won't have an FSD for raster failure anymore.
Hall C
Ongoing Issues
- Major issue with magnet GUI, Steve Lassiter is fixing with Rockwell [https://logbooks.jlab.org/entry/3747133
- HMS Dipole NMR gui screwed up, no way to set target B [1]
- Checked today and NMR was disconnected -> fix ongoing?
- Helium leak in Moller warm return, (Dave Gaskell) [2]
- Moller not finished warming up, expected we can start repairs tomorrow morning. [3]
- Moller commissioning after repairs and cool-down (expected Monday)
- Operational restrictions on optics target inconsistent with empty target (Brad/Greg)
- Need to decide raster requirements
- Raster (Mark)
- needs to be setup for 2-pass (Bill Gunning, ongoing)
- Anything else?
- Timing cuts and pre-run calibration (Eric, ongoing)
Resolved Issues
- Alarm handler properly connecting EPICS again (Steve Wood) [4].
- SHMS Shower gain match and HV good-to-go [5]
- Ion chamber calibration procedure determined (Lester, Tom, Brad, Dave Mack)
- Minor alarms on low LH2
- Lost EPICS readback on magnets [6]
- Mike Fowler performing maintenance, so not an issue [7]
Target
Ongoing Issues
- Transverse laser lines:
- Alignment done, polarization measured [8]
- Power test will be done using same lasers as longitudinal test tonight
- Other 4 lasers can be tested and commissioned without Hall Access
- RTDs
- Fabrication complete, to be installed tonight (and readout tested)
- Major temperature fluctuations measured [9]
- Pickup coil needs to be moved away from ladder today [10]
- Target heating system
- operational, but slightly under-performing [11]
- Plethora of software and readback issues, can be addressed without hall access [12]
- Safety check on light-tightness of enclosure
- What procedure will we follow?
Resolved Issues
- Target alignment withing spec, no further work needed (big milestone!) [13]
- Longitudinal laser lines tested to full power, no issues [14]
Run Plan
Scenario 1: ready Friday evening
assuming target work finished by Friday
- 2-pass commissioning over the weekend (through Monday)
- If Moller ready by Tuesday: participate in spin-dance at 5-pass
- Then go to 1-pass
- TODO: precise settings for calorimeter checkout
Scenario 2: ready after weekend
assuming we encounter critical issues that prevent us to close the hall
- Participate in spin-dance at 5-pass if Moller ready
- go directly to 1-pass for all commissioning
- TODO: need to share contingency all-1-pass run-plan, especially because we will be hard-pressed to get more than 3 days...
Plan through Friday
- Hall work during Thursday day
- Target work during night Thursday-Friday
- Finish up hall work during Friday day, and engage interlocks on target.
- Repair Moller during Friday day.
- Get required signatures on ERR to allow for beam delivery on Friday (crucial software needs to be done!)
- ?: Ask day shift workers to come in around noon?
- Need to move spectrometers with Steve Lassiter to go to 30degrees for scenario 1
- Bullseye scan plans? [15]
- Tentative run checklist for 2-pass startup [16]
Other
Special Requests
- Please be gentle with our target :-)