Difference between revisions of "RC Meeting, Wednesday, January 19, 2022"
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= Current Status = | = Current Status = | ||
− | Current RC: Dave Gaskell | + | Current RC: Dave Gaskell -> Simona Malace |
− | * SHMS left setting (Q2=3.85, W=3.07, low epsilon) LH2 in progress: 7943 pions as | + | * SHMS left setting (Q2=3.85, W=3.07, low epsilon) LH2 in progress: 7943 pions as of run 14361 |
− | * Counting House computer issues due to Computer Center maintenance and dependencies on /site | + | * Counting House computer issues due to Computer Center maintenance and dependencies on /site (swing shift). Addressed by Brad (pointed apps to local versions): https://logbooks.jlab.org/entry/3973669 |
− | * SHMS Q1 interlock near end of swing. Fixed remotely by Steve Lassiter: https://logbooks.jlab.org/entry/3973740 | + | * SHMS Q1 interlock near end of swing. Fixed remotely by Steve Lassiter: https://logbooks.jlab.org/entry/3973740. One of the lead-flow controllers did not recover cleanly - Heidi would like to look at this. |
− | + | ||
= Future plans = | = Future plans = | ||
+ | * Simona takes over as RC | ||
* Complete LH2 (SHMS left). Continue with aluminum dummy, LH2. | * Complete LH2 (SHMS left). Continue with aluminum dummy, LH2. | ||
* Projections suggest this kinematic could be complete by late day, early swing shift: https://logbooks.jlab.org/entry/3973727 | * Projections suggest this kinematic could be complete by late day, early swing shift: https://logbooks.jlab.org/entry/3973727 | ||
− | * Plan for Thursday should be discussed - bad weather expected Thursday and Friday. | + | * Plan for Thursday should be discussed - bad weather expected Thursday evening and into Friday. Possible options: |
− | + | ** Defer Q2=2.45 setting and start with Q2=5.0, SHMS left setting (theta SHMS=8.17 degrees) -> ready to rotate to small angle Sunday? | |
+ | ** Stop at set time Thursday (noon?). Start with Q2=2.45, SHMS small angle setting (6.19 degrees), then rotate to larger angle | ||
= Current Run Plan = | = Current Run Plan = |
Latest revision as of 09:49, 19 January 2022
Contents
RC Meeting Information
RC Daily Meetings are at 10 AM, remote
- Zoom remote connection information:
Join ZoomGov Meeting https://jlab-org.zoomgov.com/j/1607100885?pwd=ZFBsRTFsYm5Zb0laZ0tyZXNjcEE0QT09 Meeting ID: 160 710 0885 Passcode: 595071 One tap mobile +16692545252,,1607100885# US (San Jose) +16468287666,,1607100885# US (New York) Dial by your location +1 669 254 5252 US (San Jose) +1 646 828 7666 US (New York) +1 669 216 1590 US (San Jose) +1 551 285 1373 US 833 568 8864 US Toll-free Meeting ID: 160 710 0885 Find your local number: https://jlab-org.zoomgov.com/u/ab2CekLXgQ
Useful Links
- Fall 2021 Shift Schedule
- PionLT Physics Status
- PionLT Runplans
- Hall-C Controls
- Hall-C Logbook
- MCC White Board
- OPS 7:45 RC meeting Zoom link
- OPS daily 8:00 meeting and Wed 1:30 new Zoom link
- Zoom link for remote shifts: https://jlab-org.zoomgov.com/j/1613876340?pwd=WG1pOFVsaXdGaHJvbG15QVBjL3k5Zz09
Announcements
- Social distancing requirements back in place. Please maintain a separation of 6 feet during shifts.
- See updated guidance on JLab COVID-19 isolation and quarantine protocols: https://www.jlab.org/memo/jlab-covid-19-isolation-and-quarantine-requirements
- Communicate with Occupational Medicine if you have COVID-19 symptoms, have tested positive for COVID-19, or have been exposed to someone who has tested positive for COVID-19: (jnewman@jlab.org or jbanks@jlab.org).
- Please keep an eye on the HMS NMR during shift. Due to the NMR locking instability, the alarm has been been disabled, so slow drifts of the NMR signal may be missed.
- See note on lower right TV screen for bringing up Zoom in CH for remote 3rd shifts
Current Status
Current RC: Dave Gaskell -> Simona Malace
- SHMS left setting (Q2=3.85, W=3.07, low epsilon) LH2 in progress: 7943 pions as of run 14361
- Counting House computer issues due to Computer Center maintenance and dependencies on /site (swing shift). Addressed by Brad (pointed apps to local versions): https://logbooks.jlab.org/entry/3973669
- SHMS Q1 interlock near end of swing. Fixed remotely by Steve Lassiter: https://logbooks.jlab.org/entry/3973740. One of the lead-flow controllers did not recover cleanly - Heidi would like to look at this.
Future plans
- Simona takes over as RC
- Complete LH2 (SHMS left). Continue with aluminum dummy, LH2.
- Projections suggest this kinematic could be complete by late day, early swing shift: https://logbooks.jlab.org/entry/3973727
- Plan for Thursday should be discussed - bad weather expected Thursday evening and into Friday. Possible options:
- Defer Q2=2.45 setting and start with Q2=5.0, SHMS left setting (theta SHMS=8.17 degrees) -> ready to rotate to small angle Sunday?
- Stop at set time Thursday (noon?). Start with Q2=2.45, SHMS small angle setting (6.19 degrees), then rotate to larger angle
Current Run Plan
- Complete Q2=3.85, W=3.07, low epsilon, SHMS left data taking on LH2.
- SHMS settings: theta = 8.39 degrees, P=6.538 GeV
- HMS settings: theta = 35.12 degree, P=-1.332 GeV
- Targets = LH2, aluminum dummy, LD2
Notices in Effect for Shift Crew
- The Raster Coil pair Ax and Ay are off.
Raster needs to be at 4x4.Raster gui has been updated - can now request 2x2. - With LHe alarms it is good to check the cameras for plumes. If no plume and it is below the LO alarm and above LOLO then monitor with a plot and halog the problem.
- With LNitrogen alarms are not that critical. Just need to start monitoring the problem with plot and Halog.
- HMS NMR is not locking stably - the alarm is turned off. Please check on the NMR readback (while it is locked) intermittently to make sure the HMS dipole field is not drifting,
Current Issues
- Vertical beam position on target has changed a little: Dave Meekins is not concerned about an offset of this size (<0.5 mm).
- There is a rotation issue that has come up if moving HMS between 19 to 25 degrees. It usually gets stuck around this range, please be wary of this issue. We will likely skip settings in this range if this drive controller error cannot be solved. For singles it will not be a big deal to skip settings for HMS at those angles. We need a longer access to address this issue.
- The Raster Coil pair Ax and Ay are off
- Diffuser limit at 46uA (Note: is this still valid?)
Crew Chiefs,
We have permission to raise the Hall C diffuser raster limit to allow running >46uA to Hall C. This limit is normally imposed when one of the two rasters is not operative. Since the hall was able to double the running raster current to get the same size raster on the target as having both rasters, Keith is allowing us to raise the limit.
To get to the setting, open the Hall C diffuser interlocks screen. Go to the bottom right corner and open the Expert screen. Just below and to the right of the FSD bits, raise the "Raster 1 OK Limit" to slightly above the highest current the hall wants to run at. Do not change the Raster 2 limit. Make a log entry with screen shots. Make an ABIL entry, System MPS and an expected removal date of 3 Jan. 2022.
Paul
Planned Accesses to the Hall
- None
Planned Accelerator Configuration Changes
- Hall B pass change planned for Monday, Jan. 24
- 2L18 cryocycle required for next run period - planned for next Tuesday or Wednesday. Accelerator will be down for 4 shifts.
Special Requests
- None