Time resolved synchrotron radiation X-ray topography study of surface acoustic waves propagation.

The purpose of this contribution is to study several phenomena influencing the formation of X-rays diffraction images of SAW propagating on crystals so to be able to use them to obtain further information about the SAW. We consider particularly new contrasts appearing in white beam section topographs made with low or large amplitude SAW. The first ones can bring information about propagation at different depth and the second allows a measurement of the amplitude of the SAW.