TOMOGRAPHIC ENERGY-DISPERSIVE TOMOGRAPHIC ENERGY-DISPERSIVE DYNAMIC SYSTEMS

Abstract Tomographic energy-dispersive diffraction imaging (TEOOI) is a technique, which exploits a well-defined energetic white X-ray beam from a synchrotron to gain diffraction information from volume elements within a bulk sample. Most tomographic methods rely on spectroscopic absorption or fluorescence signals to provide elementaUcompositional contrast; by comparison TEDDI provides structural contrast, through diffraction, irrespective of whether there is any elemental variation, At the heart of this technique is energy-dispersive diffraction (EDD), which is a mode of X-ray diffraction less-familiar to most researchers and is therefore briefly outlined prior to a basic description of the TEDDI technique; this technique is then illustrated by studies carried out on white beam instruments at the SRS (station 16.4) and ESRF (beamlines ID9 and 1030) synchrotron sources, with examples taken from materials/engineering science involving both static and dynamic systems. keywords: Tomographic energy-dispersive diffraction imagingdynamic diffraction tomographynon-equilibrium processmulti-angle EOD