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Figure 7
Top: back-traced spot pattern for the diffracted beam at the position of the distant virtual line source according to equation (12)[link] at a distance of Y2 = −64.69 m upstream of the grating for the parameters reported in Fig. 6[link]. For a comparison with Fig. 6[link] (top) one has to recognize that the displayed window presents half of the apparent opening angle in comparison with the apparent opening angle of the displayed window in Fig. 6[link]. Bottom: spot pattern from the top after rotation of the window by θ2 = −59.75°, i.e. by 59.75° counterclockwise (25 000 rays). For a comparison of this pattern with the pattern at the bottom of Fig. 6[link] one has to recognize that both displayed windows present the same apparent opening angle in the vertical direction.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 27| Part 6| November 2020| Pages 1499-1509
https://doi.org/10.1107/S1600577520011194
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