The structure of the beamstop:
- 5x5 mm film of Si: 250 μm
- 3x3 mm film of Si over the previous one: 300 μm
- 0.5 mm circle piece of Ta: 500 μm
In case of 8 keV photon energy the corresponding scaling factors have to be applied to each film:
- 74.38 (2696.87 for stack)
The example of Siemens Star diffraction pattern in log- scale with a semitransparent beamstop:
After the setup of the beamstop during the experiment a test image should be taken.
Two regions of outer and inner beamstop are selected ones and correction coefficients are applied:
The regions of lines are selected by 8 points manually selected.
The result of automated interpolation looks as follows:
Since the coefficients are not known precisely, a PSD fitting can be performed.