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Figure 9
(a) Illustration of the reciprocal-space resolution associated with the realistic experimental conditions of the XRIM experiment, including the incident and reflected beam divergence (Δα and Δβ, respectively) and the finite width of the specular rod associated with the real-space resolution of the X-ray optics. (c) Simulations of the rocking scan shape for the beam on the flat terrace and centered on a step (red and blue lines, respectively) and (d) image contrast expected as a function of the in-plane sample angle, δα, for a step oriented orthogonal to the scattering plane (Fig. 2i[link]) using the actual experimental parameters used in the present experiments. The data are the same as that found in Fig. 8(b)[link]. Simulations of (e) rocking scan and (f) image contrast as a function of the out-of-plane sample angle, δχ, for a step oriented in the scattering plane (Fig. 4d[link]). Note the similarity of the XRIM response for these cases, except for the range of the sample tilt needed to obtain contrast reversal (±0.05° and ±2°, for δα and δχ, respectively).

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 15| Part 6| October 2008| Pages 558-571
doi:10.1107/S0909049508023935
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