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| Home > Publications database > Spatio-temporal coherence of free-electron laser radiation in the extreme ultraviolet determined by a Michelson interferometer |
| Journal Article | PUBDB-2014-03442 |
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2014
American Institute of Physics
Melville, NY
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Please use a persistent id in citations: doi:10.1063/1.4895455
Abstract: A key feature of extreme ultraviolet (XUV) radiation from free-electron lasers (FELs) is its spatial and temporal coherence. We measured the spatio-temporal coherence properties of monochromatized FEL pulses at 13.5 nm using a Michelson interferometer. A temporal coherence time of (59±8) fs has been determined which is in good agreement with the spectral bandwidth given by the monochromator. Moreover, the spatial coherence in vertical direction amounts to about 15% of the beam diameter and about 12% in horizontal direction. The feasibility of measuring spatio-temporal coherence properties of XUV FEL radiation using interferometric techniques advances machine operation and experimental studies significantly.
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