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Figure 7
Positions of the efficiency maxima (zmax1,zmax2) and minima (zmin1,zmin2) shown in Fig. 6[link] as a function of varying outermost zone width drN (a) or diameter d (b). This was done for an individual zone plate thickness of ti = 0.9 µm. Clearly the separation distances [\Delta z] show maxima and minima that scale with outermost zone width drN rather than diameter d. Also shown on the left is the Talbot distance zTalbot based on equation (10)[link] for a grating with a period a = 2drN determined by the outermost zone width. The efficiency maxima and minima scale with drN, but the ideal separation distance [\Delta z] corresponding to zmax1 is at about one-quarter of the distance [2(2\,{\rm{d}}r_{N})^{2}/\lambda].

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 25| Part 4| July 2018| Pages 1048-1059
https://doi.org/10.1107/S1600577518007208
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