August 8, 2022
From HallCWiki
Contents
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
- Completed Q2=3.85, W=2.62, high epsilon (pi-) setting around midnight last night.
- Started Q2=6, W=2.4 left on OWL shift. Rate was about 1700 pions/hour, suggesting 14-15 hours needed just for this SHMS angle. Followup: ended up with 2462 after diamond cuts.
- At 7:30, switched to SHMS center setting (Q2=6, W=2.4 pi-). Rate appears to be a little higher, 1857 pions for a 1 hour run (note: 584 pions after diamond cuts). But we are aiming for higher statistics at this setting, so full statistics will take about 16 hours (not including dummy). Followup: if we want 4k after diamond cuts, then we only need 7-8 hours.
Current Run Plan
- Keep taking data at this setting.
- Plans for swing and owl to be discussed at RC meeting.
- 4 pass runplan outline (assuming no downtime):
- Tuesday morning: pass change
- Tuesday/Wednesday? ARC energy measurement
- Tuesday day/swing: Heep coin (9 hours)
- Tuesday swing/owl: Q2=2.45 (8-9 hours) --> theta_shms <7 degrees
- Wednesday day: SHMS to 5.5 degrees, continue Q2=2.45
- Wednesday swing: start Q2=3.85 (32 hours)
- Thursday day: maintenance day
- Friday morning: finish Q2=3.85
Notices in Effect for Shift Crew
Current Issues
- Coffee maker broken! Emergency instant coffee in Counting House.
- Shifts filled until August 14 - then we have OWL shifts available up to August 19. Lots of openings August 20++.
Planned Accesses to the Hall
- Maintenance day still scheduled for Thursday, so access may be possible during that time.
- Aerogel change - still need to finalize day, but it seems likely we won;t be ready for this before the weekend.
Planned Accelerator Configuration Changes
- Pass change on Tuesday.
- Pass change (4->3) next week. On nominal beam schedule was to take place Monday (Aug. 15). Told PD that this will likely need to be moved one day.