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• What has already been done?
  • Sharon has shown that HDF5 file writing in "Streaming" mode is very fast.
  • Now we want to extend capability for scans so that we have 1 file per camera.
• How to save scan image data into HDF5 file?
  • Use PVs:
    • extraDimSizeN = Number of shots per step
    • nExtraDims = Number of scan dimensions (0 = simple DAQ, 1 = 1D scan, 2 = 2D scan . . .)
    • extraDimSizeX = Number of steps for Dim 1
    • extraDimSizeY = Number of steps for Dim 2
    • extraDimSize3 = Number of steps for Dim 3
    • . . .
  • These PVs implicitly control the NumCapture PV
    • NumCapture_RBV = extraDimSizeN * extraDimSizeX * extraDimSizeY * . . . (depending on number of nExtraDims)
• In this scheme, we have to carefully control the triggers so that each scan step gets exactly the right number
  • We will use a new feature to do this:
    • EVNT:SYS1:1:PMAQCTRL.H = extraDimSizeN = Number of shots per step
    • EVNT:SYS1:1:PMAQCTRL.E = 0/1 to stop/start triggers to cameras
    • Need to toggle back to 0 after every step
    • Set EVNT:SYS1:1:PMAQCTRL.H back to zero at end of scan
• What happens if the camera does not receive all triggers?
  • Then scan steps are kind of messed up . . . think about how best to handle this with pulse ID
• Prefer "NDArrayUniqueId" to be "NDArrayPulseId"
• Make caput/lcaPut/lcaPutSmart consistent
• "BSA buffer" for UV spectrometer IOC?

DAQ tests E320 shift 4/30/24

Testing TIFF/HDF5 switch
- take a DAQ with TIFF and try to load it in DAN
- results look normal

Testing HDF5 DAQ
- take a DAQ with HDF5, simple DAQ, 20 shots, 1 camera (LBG_LFOV)
    - all 20 shots saved
- test with 1000 shots
    - saved 999 shots
    - took a little over 2 minutes
- add more cameras (LBG_LFOV, EOS2, GAMMA1)
    - saved 993 shots for each camera
    - ~2 min 10 seconds in total
- try streaming
    - 1000 shots
    - failed TEST 7480
- try streaming but with 10 shots
    - success with all matches
- try streaming with 200 shots
    - success with 197 matches
- try streaming with 700 shots
    - says DAQ failed on step 1 but 641 matches
- try streaming with TIFF, 700 shots
    - saved 155 matches
    - took a little more than 3 minutes
- try a 1D scan, 10 shots, 3 steps
    - did not restore to initial value
    - Spec_Quad_E
    - 28 matches
- trying a 2D scan, 10 x 2 x 2
    - saved 40 shots
- trying 2D scan with streaming
    - saved 40 shots
- try to open HDF5 images in DAN
    - error when "Plot Correlation" button pushed, expecting a TIFF image
    - Error in hlpGetImage with “imgType”

Bugs and Robustness

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