RC Meeting, Tuesday, September 14, 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

Monday Status

  • Hall was open till mid afternoon, advised we could expect beam in swing
  • Jacob caught an error in the HMS Q3 current setting when he was ramping the magnets back up, excellent job! - Log Entry
  • Did end up getting beam, physics quality from around 8pm
  • Multiple SHMS Dipole interlocks cost us an hour - Log Entry
  • Eventually finished off positive polarity just after midnight - Log Entry
    • This went smoothly and took ~30 minutes, excellent job by the shift crew, despite being spooked by Hall A
  • Took a look at rates, then took the PID leg run before starting some data taking
  • Improved timing cuts from Carlos have improved the tracking significantly Log Entry

Current Status

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

Current Run Plan

  • Carry on with current setting once we get beam back
    • Hopefully around owl shift tonight

Current Issues

  • Ongoing low HGC light issue
    • Light leak ruled out -Log Entry
    • FADC Swapped out - Things still look the same, need to investigate some analyser related leads further - Log Entry
    • Shift worker didn't see any appreciable difference from change
    • Negative polarity data now being taken, should help shed some light on the issue
      • Jacob did a quick look at electrons in the two SHMS gas cherenkovs - Log Entry

Planned Accesses to the Hall

  • Controlled access from ~9am
    • Joe B conducting a walkthrough at 11:00 - Will do target camera too if he can
  • Unclear exactly when we should expect beam back at this point, hoping for an update from the PD later today