• How are we working as a team?

    • Can we list the activities that we did where the team came together?
      • Like, did we get people trained the
        • data analyses using the DAQ system? 
        • Offline scripts?
          • which git we use
          • new functions we need to add. Example is single photon analyses
        • Comments
          • Bavna, set a meeting already for DAQ. Philip and Xavier are doing zooms and slack channel
          • Training on DAQ system to happen when tests start when new tests get run at ASC
      • Do we know how we are going to collaborate o the tools/scripts
      • Ask Ben B. to a walk though git presentation
    • What can we do better to work as a team?
  • Summary of what we did
    • Problems
      • Non linearity
      • Negative energy
        • Is this the same for quads, 2m and small?
      • They may be the same problem but we are not sure
      •  These problem showed several times but not always
    • Tested detector with CI in MFX
      • power supply set to 10A
  • Summary of what we learned
    • Bullet point
  • Summary of what we can do next
    • Science data/FEL that demostrate the problem
      • 2M (yes do and we see problems) can we get a sample of how it looks like
      • Small?
    • CI with off time
    • X-ray tests in the ASC
    • Can we get LCLS time
    • Can we get synchrotron time
      • Can we perform any tests at APS or SSRL
    • 2M vs small, do their performance looked the same.
    • Linearity scan data and see the behavior after switching matches

  • Summary of observations:

    Which Det?

    Where

    		Type of experiment experiment & run numbers

    Observation

    27

    MFX



    Negative energy after switching point
    Non linear Epix vs Wave8 AML-M/AML-L/FL

    28

    MFX



    Negative energy after switching point
    Non linear Epix vs Wave8 AML-M/AML-L/FL

    27

    CXI

    		User experiment?

    Negative energy after switching point
    Weird line out Kazutaka Nakahara could you please help me describe this?

    27 or 28? or something else

    ? (MFX 2017?)



    Linear behavior,

    Epix vs Wave8

    Old firmware, which version?

    Quad 0&1

    MFX run16

    		Calibration

    Initial think is same issue as 27/28 @AML-M

    No flux for gain switch on other gain modes 

    After rechecking the data Xavier and Philip found that negative energy is not present. Only non linearity

    This indicates different problems on Quads and single platforms. They should therefore be analyzed separately

    Quad 0&1

    Power cycle



    Data is linear vs wave8, no negative energies

    2M-1

    MFX



    1st shift: Data is linear 

    5th shift: negative energy (linearity to be checked)

    See mfxx1005021 run 443, e.g. https://pswww.slac.stanford.edu/lgbk//lgbk/mfxx1005021/ws/attachment?entry_id=63928abb26d3a4164ddd43ae&attachment_id=63928abb26d3a4164ddd43ab&prefer_preview=False (calib data displayed) - this shows the "3/4 quads are bad in AML_L" issue.

    Run 417 (only this run per the log) shows another problem, with one module acting weird in fixed mode: https://pswww.slac.stanford.edu/lgbk//lgbk/mfxx1005021/ws/attachment?entry_id=6392889120e9affe13df2438&attachment_id=6392889020e9affe13df242f&prefer_preview=False - I don't remember anything about this beyond what the log says, to be investigated.

    Didn’t recover power cycle x3

    2M-1 (and all detectors!)

    MFX (feb 23)



    Charge injection looks good on bad 3 quads. This seems to be the case for all detectors.

    2M-0





  • Beam plan:

    • Run detectors with C.I. before and after the linear scan.  Also should take forced low dark.

    • Lin. scan. With FEL

    • Repeat old firmware and new firmware


  • Lab task:
    • Timing diagram (New and old Firmware)
    • Philip and Xavier to get a list of experiment numbers from 27 when we had gain switching. Look for <0 Energy
    • What is the ADC calibration for serial stream?/ Analog signal?
    • MFX test, q2 small27/28, Quad0-1, 2M-1 (power cycle, Charge Injection, config. registers)
    • Run the pulser test


  • Negative energy, source of the problem (hypothesis):
    • firmware bug
    • power cycle
    • Bad configuration
    • Load wrong ADC calibration/Delays
    • cable too long (doesn’t seem to show any problem)
    • Current limited by power supply (doesn’t seem to show any problem)
    • 2M and small have different issues (power cycle, and railing pedestal/ <0 energy)


  • What to do with the detectors at MFX
    • Repeat power cycles in series at MFX? (Not now)
    • Decided to pull detectors (Quad) from MFX


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