title: Measuring and predicting the diffraction properties of cylindrically bent potassium acid phthalate, KAP(001), crystals.
abstract: This report presents the results from measuring the X-ray diffraction properties of a curved potassium acid phthalate (KAP(001)) spectrometer crystal using two measurement methods. One method used a diode type X-ray source and a dual goniometer analysis system, utilizing a flat, perfect KAP(001) crystal as the monochromator. The second method used a synchrotron source and dual crystal Si(111) monochromator. Bent crystals are used in X-ray spectrometers as dispersion elements. These crystals are bent into a circular cylinder section, and this bending can alter the rocking curve properties. The crystal rocking curves were measured for spectral energies ranging from 1250 to 4500 eV. A multi-lamellar model was compared to the measurements and showed good quantitative agreement. This provides a valuable tool for predicting the changes to the KAP (001) for any radius of curvature when the crystal is bent into a cylindrical section.
authors.affiliation: National Security Technologies (NSTec), LLC, Livermore, California 94550, USA.
authors.forename: M J
authors.identifier: 0000000296139220
authors.initials: MJ
authors.lastname: Haugh
authors.affiliation: National Security Technologies (NSTec), LLC, Livermore, California 94550, USA.
authors.forename: K D
authors.initials: KD
authors.lastname: Jacoby