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Science 8 June 2001:
Vol. 292. no. 5523, pp. 1853 - 1858
DOI: 10.1126/science.1055718
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Review

Free-Electron Lasers: Status and Applications

Patrick G. O'Shea,1 Henry P. Freund2

A free-electron laser consists of an electron beam propagating through a periodic magnetic field. Today such lasers are used for research in materials science, chemical technology, biophysical science, medical applications, surface studies, and solid-state physics. Free-electron lasers with higher average power and shorter wavelengths are under development. Future applications range from industrial processing of materials to light sources for soft and hard x-rays.

1 Department of Electrical and Computer Engineering and Institute for Plasma Research, University of Maryland, College Park, MD 20742, USA.
2 Science Applications International Corporation, McLean, VA 22102, USA.

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Science. ISSN 0036-8075 (print), 1095-9203 (online)