Date

Attendees

Goals

  • Define how multipacting processing automation should work

Discussion items

ItemNotes

  • Change decarad sample rate?
    • Variable based on quench event? 

  • Immediate quenching hard to detect
    • Also hard to detect as a human
    • At what point do we give up?
    • multipacting vs hard quench
      • define minimum amount of time necessary
      • say that if cavity on time not increasing after n times, declare hard quench

  • Define AMAX
    • how high do we go? 
    • 21 not usable for beam, but would give confidence at 18/19
  • We'll have to raise multiple limits
  • We should comb through ADES limits during downtime to sanity check that they make sense
  • Should make sure to set RF limit back before handing back to ops

  • Should we change couplers during the downtime?
Nice to haves
  • Quench Event
    • Starting point is when RF started, end point is when interlock trips
    • Define radiation data buffer size (store +/- around interlock trip)
      • Exposed (maybe? expert?)
      • Want to expose parameters that are likely to change after first few cavities
  • Figure out how to pull up old quench waveforms
What to display
  • RF signals
  • Radiation signals
  • live plot of time between quenches
  • Cryo signals
  • Toggle auto reset on/off
  • RF controls
  • Abort button
  • starting amplitude, ending amplitude

  • step up 0.2MV after 30 seconds
    • both adjustable

  • Full success, 30min-1hr-something at 21 MV
  • suspected hard quench below 21 MV
  • multipacting that couldn't be processed
    • time between quenches not increasing and seeing hallmark radiation spikes
  • FE onset
    • this should trigger a new full amplitude range vs radiation plot, either manual or automated

  • How to characterize when FE is a problem
    • mini FE plot when think we detect something?

Action items