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A New Twist in Diffractive Imaging

Dr. Andrew Peele

Department of Physics, La Trobe University

Friday 14th October 2005, 4.00PM, Seminar Room AR103, Graduate Research Centre.

A new technique in diffractive x-ray imaging has, in recent years, been convincingly demonstrated. Coherent Diffractive Imaging, as the method is coming to be known, reconstructs the exit wave from a non-periodic object based on its far field diffraction pattern. We have recently shown that a variation on the method using curved wavefields leads to several improvements, not the least of which is a faster solution. This along with advances in laser sources, and detectors coupled with a strong biological sciences program is the driver behind the new Centre of Excellence for Coherent X-ray Science. I will discuss some aspects of the proposed Centre activities. As an example I will use that most interesting and ubiquitous feature of natural wavefields - the x-ray vortex.

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