Modelling of Kα X-Ray Yield From a Foil Under the Vacuum Heating of Hot Electrons by a Femtosecond Laser Pulse

Enhancement 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...