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Figure 7
Schematic of STXM optics indicating how the position of the ZP relative to the sample affects the spot size on the sample. D is the width of the ZP, OSA is the order-sorting aperture, A0 is the position of the sample relative to the OSA, δr is the width of the ZP outer zone and δA0 is the value added to A0 to set the position of the ZP to achieve a desired spot size S. Beam layouts at the sample for each of four adjacent pixels are shown for the sample positioned to be `in focus' and `defocused'.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 28| Part 3| May 2021| Pages 834-848
https://doi.org/10.1107/S1600577521001703
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