Meeting with Dan Damiani, Clemens Prescher, Silke Nelson, Phil Hart, Suzanne Ali, Chris O'Grady on July 5, 2022

  • cheap large (0.5m) medical detector $50k
  • 2880x2880 15fps .15mm pixel size, 15.82MB per event
  • 1 optical fiber (unknown protocol, requires vendor's frame grabber, pcie card)
  • trigger is TTL BNC
  • 67ms readout time
  • internally detector always runs (10Hz synced to eu-xfel)
  • trigger 10Hz
  • windows dll (from the varex company), no timestamp on the data (just image data)
  • non-certified windows driver
  • no linux (in beta)
  • website? send talk?
  • https://github.com/CPrescher/Varex4343HED
  • manual: https://jira.slac.stanford.edu/login.jsp?permissionViolation=true&os_destination=%2Fbrowse%2FLCLSECSD-899&page_caps=&user_role=
  • calibration?  no calibration.
  • looked for detector geometrical distortion, but didn't see much
  • From dmitri (representing MEC):
    • collaboration with John Eggert 6 months
    • in-house proposal not accepted yet
    • how many detectors? only one, possibly two.
    • will it come often?  used 2 or 3 times per run perhaps.
    • rate? 1 shot every 7 minutes with long-pulse laser.
      • may want to run at 10Hz to make sure they have right q coverage ("setup")
    • wanted april/may 2023 for in-house beamtime.  
    • could use epix10k as fall-back
    • will take some pre-long-pulse-laser FEL shots (10?).  not too many to avoid damaging sample.  run a sequence for this?
    • need it visible in ami?  dmitri says not mandatory (would have to bin a lot)
  • independent/standalone running: software called XIS, and another more expert software a petra beam line PO2.2
    • dmitri would like it integrated.  wants it to be "standard configuration".
    • have done standalone in the past with other devices
  • maybe run standalone windows and save all data with approximate timestamp (could be off by one)
  • detector has a lot of background.  3000 counts are background.  can be off-by-one.  can persist across readouts if oversaturated (ghost correction)
  • eu-xfel saves all events, and search for the "bright" image
  • getting help
    • suzanne ali
    • clemens prescher: advice on current system
    • peregrine mcgee can perhaps help?
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