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Nature 455, 297-299 (18 September 2008) | doi:10.1038/455297a; Published online 17 September 2008

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Photonics: Illumination for atomic movies

Claudio Pellegrini1

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Free-electron lasers could produce X-rays intense enough to make atomic-resolution movies. Initial designs are kilometres long, but a prototype working in the ultraviolet points a way to shorter machines.

Scientists have long dreamed of having a video camera with which to record individual atoms and their motions, and perhaps even to follow electrons during physical, chemical and biological processes. Radiation of extremely small wavelengths is needed to resolve atomic and sub-atomic details, and so attention has focused on the use of high-energy electrons to produce coherent beams of X-rays.

  1. Claudio Pellegrini is in the Department of Physics and Astronomy, University of California, Los Angeles, Los Angeles, California 90095, USA.
    Email: pellegrini@physics.ucla.edu

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