title: A monolithic Fresnel bimirror for hard X-rays and its application for coherence measurements.
abstract: Experiments using a simple X-ray interferometer to measure the degree of spatial coherence of hard X-rays are reported. A monolithic Fresnel bimirror is used at small incidence angles to investigate synchrotron radiation in the energy interval 5-50 keV with monochromatic and white beam. The experimental set-up was equivalent to a Young's double-slit experiment for hard X-rays with slit dimensions in the micrometre range. From the high-contrast interference pattern the degree of coherence was determined.
authors.affiliation: Universität Potsdam, Institut für Physik, Am Neuen Palais 10, D-14468 Potsdam, Germany. leitenberger@uni-potsdam.de
authors.forename: Wolfram
authors.initials: W
authors.lastname: Leitenberger
authors.forename: Ullrich
authors.initials: U
authors.lastname: Pietsch