Fast and Ultrafast Energy-Dispersive X-Ray Reflectrometry Based on Prism Optics

Interference spectra of X-ray reflection from thin films have been obtained for the first time by the decomposition of the spectrum of a polychromatic beam by means of a diamond prism. The measurements of film nanostructures and reference absorption spectra have been performed at the ESRF synchrotron. The proposed spectrometric scheme allows obtaining the interference pattern in a wide range of the scattering vector length q without angular scanning. This makes it possible to study ultrafast processes in layered nanostructures at an intense external action of laser pulses or charged particles with a time resolution of about the duration of an X-ray pulse. © 2017, Pleiades Publishing, Inc.