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A New Rapid X-ray Technique Using Ultra-short Electron Beams

Accepted submission by Phoenix666 at 2016-12-14 15:58:23
Science

EU-funded researchers have developed a new ultrafast X-ray technique which could revolutionise our understanding of structure and function at the atomic and molecular level.
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The AXSIS team, led by Franz Kaertner, Professor of Physics at the University of Hamburg, has developed attosecond serial crystallography and spectroscopy [phys.org] which can give a full description of ultrafast processes atomically resolved in real space and on the electronic energy landscape. They believe this new technique will turn our understanding of structure and function at the atomic and molecular level on its head and help unravel fundamental processes in chemistry and biology.

The technique involves applying a fully coherent attosecond X-ray source based on coherent inverse Compton scattering off a free-electron crystal, developed by the project, to outrun radiation damage effects caused by the high X-ray irradiance needed to capture diffraction signals.

The team is also using this advance to optimise the entire instrumentation towards fundamental measurements of light absorption and excitation energy transfer. This includes X-ray pulse parameters, in tandem with sample delivery and crystal size as well as advanced X-ray detectors.


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