METHOD FOR MAKING DOUBLE-CURVATURE JOHANSSON X-RAY SPECTROMETER CRYSTAL

摘要

PROBLEM TO BE SOLVED: To accurately and simply make a double-curvature Johansson X-ray spectrometer crystal without damaging the crystal itself.;SOLUTION: A base 22 having the surface shape of a concave troidal face with a radius of curvature of 2R in the dispersion direction and a radius of curvature of r in the width direction is coated with an adhesive 23. A sheet of very thin flat crystal 21A is placed, and a crystal protection sheet 24 is placed on it. A pressing force in the base 22 direction is applied on the crystal protection sheet 24 with a pressing member 25 having the surface shape of a convex face with a radius of curvature of 2R in the dispersion direction and a radius of curvature of r in the width direction. The pressing member 25 and the crystal protection sheet 24 are removed, an adhesive 26 is applied on the surface of the flat crystal 21A, another sheet of flat crystal 21B is placed, a crystal protection sheet 24 is placed on it, and a pressing force in the base 22 direction is applied on the crystal protection sheet 24 with the pressing member 25. The above processes are repeated until the thickness of the sheets of crystal superposed one on the other reaches a specified thickness, and then the surface of the crystal is polished to shape at least the surface in the dispersion direction into a quadratic concave surface with a radius of curvature of R.;COPYRIGHT: (C)2007,JPO&INPIT