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Phys Rev Lett. 2008 May 23;100(20):205002. Epub 2008 May 21.

Observation of subpicosecond x-ray emission from laser-cluster interaction.

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  • 1Université Bordeaux I; CNRS; CEA; CELIA UMR 5107, 351 cours de la Libération, Talence, F-33405 France. dorchies@celia.u-bordeaux1.fr


We present the first experimental evidence of the subpicosecond duration of x-ray pulses emitted from laser-irradiated clusters, demonstrating the suitability of such a debris free target for ultrafast x-ray science applications. The K-shell emission (approximately 3 keV) from large Ar clusters (6 x 10(5) to 4 x 10(6) atoms) is time resolved, when irradiated by ultrashort (40 fs to 5 ps) and intense laser pulses (10(15-17) W/cm2). The observations are supported by hydrodynamical and collisional-radiative calculations, that reproduce the extremely short x-ray pulse duration.

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