Abstract

We describe an x-ray interferometer optimized for operation with synchrotron radiation at the storage ring DORIS at DESY, Hamburg. Function principles, design, and manufacture are discussed. Interference fringes are created by scanning the analyzer crystal of the instrument in increments below 0.1 Å. Special attention is paid to minimize warping due to gravitational forces and disturbances from acoustic noise and ground vibration. The characteristics of two different monochromators with respect to harmonic rejection or harmonic selection and beam stability are considered. The instrument is best suited to the measurement of anomalous dispersion, for which an example is given.

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