RC meeting and Run Plan, Wednesday December 1st
From SBS wiki
RC Meeting Information
RC Daily Meetings are at 3:15pm, remote connection link: https://bluejeans.com/256205934
Accelerator and Hall Status
- We are currently in controlled access, probably through the whole day shift. Should be able to back to beam permit in Swing shift.
- Subsystems fixed a series issues during the controlled access, see subsystem updates.
- 10 uA on LD2, and 12 uA on LD2 GEM/Tracking study runs were finished in last Swing shift
- RC for next week: Eric King
Pending and New issues
- GEM Layer INFN J0 common mode drifting higher, see loghttps://logbooks.jlab.org/entry/3953952
Resolved Issues
- The noisy APV on one UV layer has been resolved, see a log by Sean: https://logbooks.jlab.org/entry/3953885
- DAC GUI for setting up BBCal Trigger Threshold was fixed, the rpi controller for this has been configured as remote controllable
- HCAL HV miscommunication issue was fixed
- Power cycled GEM HV Crate in an escorted access in last Swing shift, this resolved GEM HV Monitor frozen issue
- Script to accurately calculate beam charge is close to finish by Bob and David
Subsystem Updates
- HCAL
- Raspberry PI controller for HV is fixed, now it is remote controllable;
- Updated online Panguin plots, it is working in the counting house for shift crew.
- DAC GUI for setting BBCal trigger threshold is fixed
- work on new timing resolution analysis on-going
- BBCal:
- Moved rpi controller to remote controllable power switch
- Still need to do a cosmic run under SBS-OFF BB-ON configuration. Since needs BB-ON, so need Hall in Beam Permit to do it
- Timing hodoscope:
- Things are OK, happy with 50k replay results
- Grinch:
- GEMS:
- Full replay for higher beam current run is on-going
- The cause for INFN J0 layer common mode drifting higher issue is not clear. LV, patch panel all looks fine
- The drift of common mode to higher value may lead to failed online zero suppression, fixable in offline
- Common mode drift in the order of 40 - 50 ADC, still within our online zero suppression cut threshold: 100 ADC
- Not necessary to retake pedestal too often, pedestal is stable
- New GEM pedestal run is already done
- From Sean: two problematic APVs on UVa GEM layers have been fixed. Confirmed one more HV sector died on one UV GEM chamber
- Beamline:
- Updated scaler GUI, Mya Plot
- A very rough calibration for scaler variables is done
- A detailed plan to accurately do the calibration is developed, will be performed after the meeting
- DAQ:
- Smooth DAQ
- Prepared a new CODA config, which includes saving raw data to both /adaqeb1 and /adaqeb2
- Replay analysis:
- Full replay for higher current run on GEMs are on-going.
Run Plan
Follow the SBS-11 run plan listed on the wiki: https://sbs.jlab.org/wiki/index.php/Main_Page