Figure 1
Experimental set-up. (a) Beamline set-up. (b) Schematic view of the reflected and refracted beams. The angle α is the inclination of the mirror surface to the incident beam. x = 0 is the centre of the reflected beam (midpoint beween the two geometrically reflected beams), and angle αr is in between the refracted beam and the mirror surface. The image on the right-hand side was recorded using 30 keV X-rays at α = 0.06° (the original height of the displayed field of view is 15.4 mm). |