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A diagram from Yves showing their shmem analysis.  They will likely use psana/ami.

Discussion on June 23, 2022

With Yves/Questions (feb. 3, 2022) from Matt/Chris:

• how do we time-in the detector
  • proposal: we run a low-rate beam, see a "prompt" signal (high energy, lower TOF electrons), move the timing to be close to that prompt signal
  • other possibility: use a diode with accelerator at the experiment and use the simulator box to "calibrate" extra delays in the system.  one cable goes to photodiode, other goes to the simulator (either start signal, or output signal)
• do electron hits cross pulse id boundaries
  • yes, this can happen
  • analysis software can't tell if an electron really belongs to this pulse (not complicated algorithm to assign electrons to other pulse-ids)
  • try to configure voltages so this possibility is minimized
• how do we know what the pulse id boundaries are (e.g. is there one udp packet per pulse)
  • happens naturally 
• clarify interface between daq and surface-concepts ack'd-udp code
  • this scTDC code is provided by surface concepts
  • need the "simulator box" and the "TDC box" (maybe received at SLAC sometime in July?)
• ami plots needed

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