RC meeting and Run Plan, Tuesday November 15th

From SBS wiki
Revision as of 11:43, 16 November 2022 by Pdbforce (Talk | contribs) (Miscellaneous)

(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Jump to: navigation, search

Return to the RC Meeting Calendar

RC Meeting Information

Time:at 3:30pm today

  • Location: Counting house conference room

Useful Links

Current Status

Accelerator and Hall Status

  • Beam maintenance started at 6:45am
  • Hall is in "Controlled Access". Attached is a list of work requests at the end of this report.
  • We took production data at 45muA all of swing and owl shifts yesterday.
  • Target tests were done before sweeping the hall this morning.
  • As soon as we lock up the hall, target experts will perform additional tests.
  • Beam is expected to be back around 8pm.
  • MCC is happy to support us for mini spin dance measurement in association with the Moller measurement on Thursday.
  • Won't do BCM calibration tomorrow.

Current Activity and Issues


  • DAQ gets stuck somewhat frequently without obvious warning/error message. Shift crew gets confused and it may end up taking hours to fix. Is it possible to force CODA to throw better error messages? - Alex


  • Dump right Ion chamber unresponsive. For now director of operations agreed to allow running with just one dump IC. - J. Kowal and team will work on it (& Compton IC) tomorrow

Run Plan

Current Plan

  • Perform target tests
  • Do beam checkout
  • Continue taking production data
  1. 43uA of beam current | Use ps3=ps5=0, ps1=9, ps2=15, rest =-1 | One hour long runs
  2. Move the target to the pickup coil position and do an NMR sweep every 2/3 hours
  3. Return to step 1.


  • Moller measurement - Thursday day shift (Mini Spin dance?)
  • Optics runs with sieve in
  • Calibration runs on H2
  • GEM luminosity study

Subsystems Updates

Polarized Target

  • Polarization: 42.4% (12:17pm)

Quick Summary on the performance of every sub-system during GEn




Instructions for Shift Crew

  • Keep an eye out for drifting BPM positions and TS1-BBHI rate. Post a screenshot of the relevant strip-charts and GUI twice every shift.
  • If beam has been down due to accelerator issues perform a checkout of the beam profile by doing harp scans and check beam centering on target using the Carbon hole target, see Simona's procedure: procedure, If in doubt about whether you should go through the beam checkout procedure, call this number: 7578693131.
  • Cross check the rate with what is expected: He3, H2
  • Cross check with the expected ion chamber readings: log
  • If holding field is changed for any reason, do NOT perform an NMR measurement.

Be sure to follow these procedures:


Experimental progress (for MCC planning meeting)

  • 8.6% of accumulated charge for production data (19.9 Coulombs out of 232)
  • 36% Experimental run time (51 out of 141 days)