High energy synchrotron x-rays: a tool for bulk investigations in physics and materials science
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Date
2005-01-31
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Publisher
Australian Institute of Physics
Abstract
High energy X-rays between 30 keV and 1 MeV, as provided by modern synchrotron sources like the ESRF
and HASYLAB at DESY, bear the advantage of deep penetration into most materials. Even heavy element
compositions can be accessed in their volume. The range of applications is huge and spreads from nuclear physics to the characterization of a metal deformation under industry-related conditions. This presentation compiles an overview of my experience with the most common instrumental techniques and selected applications. Triple axis diffractometry can be used for highest resolution purposes on single crystal characterization, even under heavy and dense sample environments. Thus artificial or ultrasonic superlattices can be characterized as well as structural changes around different kinds of phase transitions. Time resolved studies can be performed stroboscopically from a sub-nanosecond to a second time scale and are presented. Modern two-dimensional detectors are used to obtain rapid overviews in reciprocal space. Whole sets of Debye-Scherrer rings are registered onto the detector, their diameters and eccentricities or their intensity distribution along the rings relating to anisotropic strain or texture measurements, respectively. Imaging techniques such as topography, radiography and computed tomography allow to seize direct information in
real space. Combinations of the different techniques will play a most important issue in the design of future
beamlines and a flux estimate for a potential Australian beamline is given.
Description
Keywords
High energy physics, Synchrotrons, Materials, Penetration depth, Composite materials, Range, Superlattices, Debye-Scherrer method, Topography, Beams
Citation
Liss. K. D. (2005). High energy synchrotron x-rays: a tool for bulk investigations in physics and materials science. Paper presented to the 29th Condensed Matter and Materials Meeting, "Australian Institute of Physics Sixteenth Biennial Congress", Canberra, 2005, 31 January - 4 February 2005.