Figure 6
(a) Vertical edge scan over the focused beam at the sample position in P09-EH1 at 8 keV using the mirrors as the focusing device in the 2.65 mrad configuration (cf. Table 1). The vertical beam size is 29 µm. The derivative of the fit to the edge function (dotted line) is shown as a full line. (b) Wire scan (inverted) using a 5.8 µm wire over the beam, refocused by compound refractive lenses, positioned 1.9 m before the sample position in EH1 at 76.7 m, with a virtual source at 93 m (prefocused by the mirror). The width of 4 µm is derived from a fit of a Lorentzian convoluted by the Gaussian representing the wire thickness. |