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Figure 2
(a) Rejection of extrinsic signals from the Be gasket by a multilayer Montel mirror. Scattered X-rays from the sample (red) and extrinsic scattering from the Be gasket (green) arrive at the mirror surface at different incidence angles, [{\theta_{\rm{r}}}] and [{\theta_{\rm{g}}}], respectively. Since the difference in incidence angles is larger than the width of the mirror rocking curve shown in (b), the contamination is rejected. The mirror's field of view (FOV) at the sample is 98 µm (FWHM of the rocking curve × 200 mm mirror–sample distance), clearly excluding rays emanating from the Be gasket.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 27| Part 4| July 2020| Pages 963-969
https://doi.org/10.1107/S1600577520005792
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