RC Meeting, Monday, September 13, 2021

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RC Meeting Information

RC Daily Meetings at 10:00, remote

  • Bluejeans remote connection information:
 To join the Meeting:
 To join via Room System:
 Video Conferencing System: bjn.vc -or-
 Meeting ID : 861439920
 To join via phone :
 1)  Dial:
   +1.408.740.7256 (US (San Jose))
   +1.888.240.2560 (US Toll Free))
   +1.408.317.9253 (US (Primary, San Jose))
   (see all numbers - http://bluejeans.com/numbers)
 2)  Enter Conference ID : 861439920

Useful Links

Weekend Status

  • Frustrating weekend
    • Lots of downtime due to accelerator issues
    • Good beam when we actually had it
  • Rotated SHMS to 6.26 degrees
    • Rates are high
    • 960 kHz S1X and 400k SHMS 3/4 at 10uA beam for positive polarity

Current Status

  • Down due to Hall D startup work
  • Should expect beam late evening/early morning

Current Run Plan

  • ~ 62k out of 100k from LD2+ run done
  • Need another 4 hours or so of beam on data
  • Switch to negative polarity after
    • To the spokespeople - Decisions to be made for negative polarity running, rates will be higher

Current Issues

  • Ongoing low HGC light issue
    • Software issue?
      • hcana "GoodHit" definitions?
      • FADC changes?
      • Other analyser updates?
    • Hardware issue?
      • Gas pressure?
      • Gas contamination?
      • Light leak?
  • Can try to address potential hardware causes today during downtime
  • Coverage on the RC phone in the counting house/hall sucks
    • Anyone on Sprint - How's your signal in those areas?
  • We need the cameras for the other halls back up on the screen
    • Need a shortcut for this on cvideo3?

Planned Accesses to the Hall

  • Controlled access from ~9am
  • Joe B will try to get the target camera going
  • Larry C wanted to take some measurements
  • From above, work to be done to rule out/fix a potential hardware cause for our HGC woes