Simulation of the generation of characteristic X radiation under vacuum heating of electrons by a femtosecond laser pulse

An analytic model of the generation of characteristic X radiation under vacuum heating of electrons at the surface of a massive target by a p-polarized nonrelativistic femtosecond laser pulse is considered. The results of calculations satisfactorily describe the measured data on the output of Kα radiation generated by laser pulses with a wavelength of 1.24 μm and peak intensities of 5 × 1016–2 × 1017 W/cm2, incident at an angle of 45°.