...

• For CSPAD with moving quads (i.e. for CXI) optical measurement is done separately for each quad. The numeration of corners is shown in the plot:
  
  Image Added

The same plots in PDF format: CSPAD quad metrologyCXI pixel layout

For each quad measurement is started from the point #1 which in assembled detector is closest to the beam. The 1-st point (x,y,z) coordinates are re-set to (0,0,0) in the beginning of measurements. At the end, it is checked that the 1-st point coordinates are reproduced within precision of measurement.

...

The tail of the path: tilt/<run-range>.data

References

Description of CSPAD layout from DAQ
CSPAD quad metrology
CSPad pixel layout in quads