RC meeting and Run Plan, Thursday May 16th
From SBS wiki
Contents
RC Meeting Information
Current RC: Jiwan Poudel
RC Daily Meetings are at 3:30 (pm) via Zoom and in person in the counting house meeting room (2nd floor)
- Zoom connection link: https://jlab-org.zoomgov.com/j/1616220064
Useful Links
Summary
- Beam off for pass change in Hall C around 9:20 yesterday then Hall is accessed to fix GEM DAQ and BBCAL-HV
- First harp scan during day shift wasn't good https://logbooks.jlab.org/entry/4305263, and MCC took beam away to fix optics
- Tune back back to hall in swing shift only. Beam profile and carbon hole run was good, so ready for production around 17:50
Access to the Hall
Accelerator
- Accelerator beam studies currently scheduled on May 19th (starting at 7:00 am) and May 20th (until 7:00 am)
Current Run Plan
- Raster is on.
- Target is LD2 with a radiator
- BB magnet at 750 A and SBS magnet at 1470 A (70%)
- Set ps3=0 (coin trigger), ps5=5 , all others to -1 .
- Set BBCal threshold to approximately ~1140 MeV ( -300 mV in BBCALHI DAC) and HCAL threshold (-25 mV)
- Beam current ~2.5 uA
- 2 hr long runs
Current Issues
- Frequent DAQ crashing (mostly during the start of run )
- SBS magnet readback current fluctuation (set to 1470 A but reaches upto 1500 A sometimes) https://logbooks.jlab.org/entry/4305766, https://logbooks.jlab.org/entry/4305709
Future plans
- Moller measurement--when??
- Hall Access to remove Analyzer on Sunday (Radcon will survey the hall starting 7:00 am)
- GEMs HV/Luminosity scan on Sunday https://docs.google.com/document/d/1rIy6yNIc4nWDFDWbIboZqdVADxWlbNlhXIRjIiuWVaU/edit
