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Figure 4
Coherent specular and nonspecular reflectivity signal, as recorded for (a) the Pilatus and (b) the sCMOS detector, for (a) different values of [\alpha _{\rm i}] and (b) different amplifications. The horizontal direction (on the detector) corresponds to the qx variation and the vertical direction to qy. The position and spacing of the satellite peaks corresponds to [q_{x}=n2\pi/\lambda _{{\rm SAW}}]. The variation of the signal with PSAW and the absence of satellites for zero SAW power confirm the successful timing scheme. The pattern of the high-resolution diffraction peaks shown in (b) resembles the coherent far-field pattern of the KB beam. (c), (d) Coherent far-field scattering intensity distribution as measured by (c) the sCMOS and (d) the Pilatus detector, for four selected values of the phase φ of the SAW signal. The integrated intensity of the specular and second-order reflections [marked with, respectively, a red and blue bounding box in (d)] is displayed in (e) as a function of the SAW phase φ. The strict periodicity confirms successful phase locking.

Journal logoJOURNAL OF
APPLIED
CRYSTALLOGRAPHY
ISSN: 1600-5767
Volume 47| Part 5| September 2014| Pages 1596-1605
doi:10.1107/S1600576714016896
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