Difference between revisions of "June 20, 2022"
From HallCWiki
Jump to navigationJump to search| (2 intermediate revisions by the same user not shown) | |||
| Line 53: | Line 53: | ||
= Current Issues = | = Current Issues = | ||
* HMS singles elastics results and its implications (based on where the W peak is) to constraining (improving) the HMS saturation corrections at HMS momentum ~ -6.792 GeV, a momentum where saturation effects varies rapidly. --> https://logbooks.jlab.org/entry/4004990 | * HMS singles elastics results and its implications (based on where the W peak is) to constraining (improving) the HMS saturation corrections at HMS momentum ~ -6.792 GeV, a momentum where saturation effects varies rapidly. --> https://logbooks.jlab.org/entry/4004990 | ||
| − | ** M. Jones found W peak @ 0.925 MeV, which is ~ 15 MeV lower than the ideal (~0.940), so hmsflags.param will have to be | + | ** M. Jones found W peak @ 0.925 MeV, which is ~ 15 MeV lower than the ideal (~0.940), so hmsflags.param will have to be updated with the new offset? Will this new offset be applicable at lower HMS momenta or will it over correct it? Is it better to put apply all corrections in the HMS field03 program rather than having offsets in the param file? DO NOT CHANGE hmsflags.param momentum offset. ONLY change it from the standard.kinematics |
= Planned Accesses to the Hall = | = Planned Accesses to the Hall = | ||
| Line 60: | Line 60: | ||
** Hall C Expert needs to check SHMS ROC 4 Slot 9 Channel 0 FADC for potentially loose connection, as Column 5, Row 1 block appears to have no occupancy. [https://logbooks.jlab.org/entry/4003855 SHMS Cal Occupancy] (<span style="color:red"> '''PENDING''' </span>) | ** Hall C Expert needs to check SHMS ROC 4 Slot 9 Channel 0 FADC for potentially loose connection, as Column 5, Row 1 block appears to have no occupancy. [https://logbooks.jlab.org/entry/4003855 SHMS Cal Occupancy] (<span style="color:red"> '''PENDING''' </span>) | ||
** Xinzhan Bai request to go to restricted access to quickly swap MPD electronics out and check signals (~ 30 min.), whenever there is extended down (most likely during next accelerator maintenance period) : Contact: xbai@jlab.org, cell: (434) 422-2809 (<span style="color:red"> '''PENDING''' </span>) | ** Xinzhan Bai request to go to restricted access to quickly swap MPD electronics out and check signals (~ 30 min.), whenever there is extended down (most likely during next accelerator maintenance period) : Contact: xbai@jlab.org, cell: (434) 422-2809 (<span style="color:red"> '''PENDING''' </span>) | ||
| − | |||
= Planned Accelerator Configuration Changes = | = Planned Accelerator Configuration Changes = | ||
Latest revision as of 10:53, 20 June 2022
RC Meeting Information
RC Daily Meetings are at 11:00 (am) via Zoom and in person in the counting house meeting room (2nd floor)
- 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
- Shift Signup (Read only)
- PionLT_2022_Physics_Status
- KaonLT Logbook - Used for PionLT updates too
- Physics analysis updates should be cross posted here
- Run Plans
- Hall-C Controls
- Hall-C Logbook
- MCC White Board
Current Status
- Accelerator status:
- 45 uA beam delivered to Hall C ~ mid Swing shift yesterday (Jun 19) after long down period since 6 am
- Accelerator sill working hard to try and get Hall C up to 80 uA, will have maintenance/RF recovery on Tuesday @ 8:00 am (since Wed is for setting up Hall B spin dance)
- Experiment status:
- completed Q2=3.85, W=3.02 SHMS Left Setting (~ 45,000 counts)
- completed Q2=3.85, W=3.02 SHMS Right-2 (theta_shms=18 deg) Setting (~ 45,000 counts)
- completed HMS elastics singles (W peak looks to be in right location) --> https://logbooks.jlab.org/entry/4004929, https://logbooks.jlab.org/entry/4004990
- started new kinematic setting Q2=2.72, W=2.63 SHMS Left Setting (theta_shms=16.33 deg) --> https://logbooks.jlab.org/entry/4004989
Current Run Plan
pionLT Summer 2022 Run Plan
Physics Status
Notices in Effect for Shift Crew
- Please pro-rate ABU for max current limit in run plan (uA) in beam time accounting. For example, if we receive 15 uA instead of the max_current_limit in the run plan, then the ABU should be: ABU_prorated = 15/(max current limit) * ABU
- Message from Ole Hansen: There will be a brief (<30min) outage of the Hall A and Hall C /work servers on Tuesday (6/21). This will happen during the workday already instead of the usual 5pm-10pm time slot for monthly IT maintenance. Please plan accordingly, i.e. don't start any mass replays ;-)
- Check the HMS/SHMS rates for when production starts, since for Heep coin. production SHMS saw higher rates. Make sure shift crew takes snapshot of scalers at every setting
Current Issues
- HMS singles elastics results and its implications (based on where the W peak is) to constraining (improving) the HMS saturation corrections at HMS momentum ~ -6.792 GeV, a momentum where saturation effects varies rapidly. --> https://logbooks.jlab.org/entry/4004990
- M. Jones found W peak @ 0.925 MeV, which is ~ 15 MeV lower than the ideal (~0.940), so hmsflags.param will have to be updated with the new offset? Will this new offset be applicable at lower HMS momenta or will it over correct it? Is it better to put apply all corrections in the HMS field03 program rather than having offsets in the param file? DO NOT CHANGE hmsflags.param momentum offset. ONLY change it from the standard.kinematics
Planned Accesses to the Hall
- During the next accelerator maintenance period (NoTE: This time RF recovery will begin Tu Jun 21 @ 08:00):
- S. Lassiter needs to put crush washers in LCW filters, so we may see a little bit of water by the HMS boogie for now, until he can put the washers next week, during maintenance period HMS Dipole LCW ( PENDING )
- Hall C Expert needs to check SHMS ROC 4 Slot 9 Channel 0 FADC for potentially loose connection, as Column 5, Row 1 block appears to have no occupancy. SHMS Cal Occupancy ( PENDING )
- Xinzhan Bai request to go to restricted access to quickly swap MPD electronics out and check signals (~ 30 min.), whenever there is extended down (most likely during next accelerator maintenance period) : Contact: xbai@jlab.org, cell: (434) 422-2809 ( PENDING )
Planned Accelerator Configuration Changes
Special Requests
- Mark Jones would like to take HMS optics data with a 4x4 mm^2 raster at some point (when HMS is at a lower momentum, i.e., current setting) for checks. ( DONE )
- D. Gaskell took a run with Carbon target and raster set to 4x4 mm^2. See run https://logbooks.jlab.org/entry/4004280
