(Plane wave)-point diffractive focusing of x radiation by a biaxially curved crystal
Gabrielyan K. T. , Piskunov D. I. , Chukhovskii F. N., Demirchyan G. O.
It is shown by means of geometric-optics theory that it is possible in principle to focus χ radiation during the Bragg diffraction of a monochromatic plane wave by a biaxially curved crystal. The crystal curvature conditions are found. The position of the focal point in vacuum is found.