A method for manufacturing of double-bent X-ray optics is described. Sample
s of spherical silicon crystals with a deviation of the local angles to the
surface from the reference ones Delta alpha less than or equal to 0.05 mra
d have been fabricated by this method. The minimum radius of curvature of t
he samples is R = 1 m for the maximum aperture D = 80 mm. (C) 2001 Elsevier
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