Abstract
AbstractEnhancement of characteristic x‐ray yield from a metal foil, coated with spherical clusters, irradiated by a p ‐polarized Gaussian femtosecond laser beam, is investigated depending on the cluster size, laser pulse intensity and the foil thickness. Simulations were carried out both for the hot electrons, accelerated in accordance with the Brunel model of vacuum heating, and for corresponding Maxwellian distribution of hot electrons. Existence of an interval of cluster sizes with respect to the laser wavelength, in which the number of emitted photons from the foil with clustered surface exceeds one from the polished foil, and increase of Kα yield with growth of the laser field angle of incidence is most pronounced, is shown (© 2011 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
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