X-RAY BRAGG-DIFFRACTION IN A STRONG ACOUSTIC FIELD

High-resolution X-ray diffraction spectra were recorded using LiNbO3-b ased acousto-optical devices under surface acoustic wave excitation wi th a frequency of 290 MHz. Triplicate growth of the spectral angular w idth and a 2.5 increase in the integrated diffraction intensity were d etected at a maximum acoustic amplitude of 0.17 nm. The experimental r esults are compared with theoretical simulations. Bearing in mind poss ible applications of these findings to synchrotron radiation monochrom ators, special attention is paid to an analysis of the maximum intensi ty gains which are achievable in this kind of experiment.