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Figure 3
(a) Solid lines: focal shift as a function of wavelength according to equation (5)[link] (left axis). Dotted lines: normalized Rayleigh length as a function of wavelength (right axis). Inset: relative focal shift as a function of normalized Rayleigh length for distinct values of demagnification (see legend). The source lies at F1 (Δf1 = 0). (b) Focal shift for K–B mirrors as a function of the source shift at λ = 2, 20 nm. Solid line: graph of Δf2(Δf1) from equation (5)[link]. Thick dashed line: graph of Δf2(Δf1) from equation (5)[link] with zR = 0. Thin dashed line: graph of Δf2(Δf1) from equation (6)[link] (nominal magnification).

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 26| Part 5| September 2019| Pages 1503-1513
https://doi.org/10.1107/S1600577519010099
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