title: Two-dimensional x-ray beam phase sensing.
abstract: We present a new method to analyze quantitatively the wave front of a partially coherent x-ray beam. The technique is based on the use of two-dimensional speckle patterns combined with digital image correlation algorithms and offers a pixel size resolution, a high accuracy, and a reduced sensitivity to mechanical vibrations thanks to a very simple setup. The requirements on transverse and longitudinal coherence are also low. Finally, we show how the method can be used for phase contrast imaging applications by a single sample exposure process.
authors.affiliation: European Synchrotron Radiation Facility, BP-220, F-38043 Grenoble, France.
authors.forename: Sébastien
authors.initials: S
authors.lastname: Bérujon
authors.forename: Eric
authors.initials: E
authors.lastname: Ziegler
authors.forename: Roberto
authors.initials: R
authors.lastname: Cerbino
authors.forename: Luca
authors.initials: L
authors.lastname: Peverini