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Figure 3
Detailed scheme of the incidence beam with a vertical size 2WV as defined by slits before the sample as it impinges on the curved surface with the definition of angles used in formulas. The incident beam comes from the left. Narrow blue lines represent elementary rays. Here, h is the offset of the elementary ray from the beam center. This ray impinges with the circular surface of radius R at the point with coordinates (xi,h, zi,h). The angle ai is the effective grazing angle, while ai,h and Δai,h are the actual grazing angle at the point (xi,h, zi,h) and the difference of this angle from ai, respectively.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 29| Part 3| May 2022| Pages 711-720
https://doi.org/10.1107/S1600577522002053
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