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Figure 3
(a) Gain of the acquisition model in the near-surface region of the cylinder model with the device set at the magic angle: device far from the sample (R0 > 100μ0). The center of the plot in panel (a) is not the center of the cylinder, the near-surface area has been stretched to emphasize the surface sensitivity of the gain. (b) Cylinder geometry factor with respect to depth for a uniform illumination (f constant): in blue the pointwise model with sharp edge approximation and attenuation length λe = 2 nm, in green and in orange the cylinder model with the same attenuation length using the sharp and smooth edge approximations, respectively, and in red the pointwise model with the attenuation length replaced with the average mean escape depth ≃ 0.63λe (Winter & Faubel, 2006BB124; Dupuy et al., 2021BB20).

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 30| Part 5| September 2023| Pages 941-961
https://doi.org/10.1107/S1600577523006124
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