Forum 3 - X-ray imaging

Organizer: K. Fezzaa

Kamel Fezzaa is a Physicist at the Advanced Photon Source (APS) of Argonne National Laboratory, where he pioneered the use of white beam synchrotron x-rays to study the ultrafast at 32-ID beamline of the APS. His current interests include transient processes in soft condensed matter (free surface flow, complex fluids, ...) and in shocked materials. He continues to mature and expand the scope of his full-field (radiography, phase-contrast) imaging program to include scattering techniques such as diffraction and small angle scattering, all in the ultrafast domain. His users/colleagues community span a large range of disciplines, from fluid dynamics to material sciences, and from shock physics to additive manufacturing. He authored over 150 papers, many of which are in high impact journals, including Nature, Science, and PRL.

X-ray imaging of a cavitating flow. From: Coutier-Delgosha et al., "Velocimetry in both phases of a cavitating flow", Proceedings of the 15th ISROMAC conference, USA. 2014.

As part of the international Symposium on Image-based Metrology, this forum will focus on the use of x-rays to probe and extract information about the samples of interest. X-rays have proven to be an attractive alternative to other imaging techniques such as visible light, thanks to their high penetration power and the different contrast mechanisms they provide. In some cases, exquisite resolution and sensitivity have been demonstrated. For instance, x-rays show clear and enhanced edges at boundaries between phases is a dense and turbulent flow, such as in fuel sprays, where visible light would be highly scattered and/or absorbed. Various equipment and techniques are now available, from laboratory x-ray sources to Synchrotrons, and original post-processing approaches of the data have been proposed in the literature. The versatility of x-ray imaging is demonstrated by growing diversity of the scientific user community, including biology, material sciences, fluid dynamics, shock physics, to site only a few.

This forum is intended to create a new opportunity for these different scientific communities to share their own experience and exchange ideas, and cutting edge developments in the area of image based metrology using x-rays.