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Table of Contents

Why do I think that 2020-02-25 optical metrology is good

  • metrology was done on 2020-02-25 for new detector which currently labeled on connectors side as ePix10k2M 1, also known as epix10ka2m.1, 2M.1 etc.  
  • very good quality check
  • all z-measurements are around 1 feet, have a lot of repeatable numbers - can't be trusted

...

  • red rectangles - for points measured in optical metrology
  • blue rectangles - panels reconstructed from geometry file

DAQ panel indexes in optical metrology possible detector orientations

Code Block
titleDAQ panel indexes in optical metrology possible orientations
        rot = 0  ^y
        Q0  1  3 |  4  5  Q1
            0  2 |  6  7
        ---------+----------> x
           15 14 | 10  8
        Q3 13 12 | 11  9  Q2

        rot = 1  ^y
        Q3 13 15 |  0  1  Q0
           12 14 |  2  3
        ---------+----------> x
           11 10 |  6  4
        Q2  9  8 |  7  5  Q1

        rot = 2  ^y
        Q2  9 11 | 12 13  Q3
            8 10 | 14 15
        ---------+----------> x
            7  6 |  2  0
        Q1  5  4 |  3  1  Q0

        rot = 3  ^y
        Q1  5  7 |  8  9  Q2
            4  6 | 10 11
        ---------+----------> x
            3  2 | 14 12
        Q0  1  0 | 15 13  Q3

 

Images of panels in data for all detector orientations in metrology processing v1 without quads

  • v1 of the metrology processing script represents simplest approach - each panel coordinates are taken as is to insert in the detector
  • data from mfxc00118 run44 silver-behenate sample
  • data panel 1 (numerated from 0 to 15) is replaced by intensity ascending array, darkest corner is (0,0) pixel.

...

  • numeration of quads at rotation looks symmetric - so seems right
  • one orientation of the detector gives correct image and it shows smallest offsets between panels in quads

Detector orientation in the hutch

mfxc00118 runs 70-73 for Fe55 in the corner of quad 0-3

...

Panel 0 data is replaced by the ascending intensity array, (0,0) pixel is in the darkest corner.

mfxc00118 run44 silver-behenate

panel 1 is marked

 

mfxc00318 run 10,13 lysozyme

psana direct and mirror image for crystfel

panel 0 is marked on full size image

 

Geometry files centered for mfxc00318 run13 lysozyme

Geoptimizer or how geometry can be screwed-up

First, thanks to Olexandr and Marina for discovering how our geometry should be mapped to data array.

...

  • It is clear that blind application of geoptimizer may cause >1 mm offset of panels in x-y ... 
  • It is suggested to use geoptimizer for panels with fixed center and panel orientation in (x,y) from optical metrology and apply optimization for  z coordinate and off-plane tilts. Z coordinates were not measured correctly in optical metrology.
  • Next optical metrology is expected to be with precise (~10um) Z measurement.

References

...