Ph. A. Korneev | Searcharxiv

arXiv2006

Collisionless energy absorption in nanoplasma layer in regular and stochastic regimes

Collisionless energy absorption in 1D nanoplasma layer is considered. Straightforward classical calculation of the absorption rate in action-angle variables is presented. In regular regime the result obtained is the same as in [Zaretsky et.al., 2004], but deeper insight is possible now due to the technique used. Chirikov criterion of the chaotic absorption regime is written out. Collisionless energy absorption rate in nanoplasma layer is calculated in stochastic regime.

physics.plasm-ph↗

arXiv2004

Landau damping in thin films irradiated by a strong laser field

The rate of linear collisionless damping (Landau damping) in a classical electron gas confined to a heated ionized thin film is calculated. The general expression for the imaginary part of the dielectric tensor in terms of the parameters of the single-particle self-consistent electron potential is obtained. For the case of a deep rectangular well, it is explicitly calculated as a function of the electron temperature in the two limiting cases of specular and diffuse reflection of the electrons from the boundary of the self-consistent potential. For realistic experimental parameters, the contribution of Landau damping to the heating of the electron subsystem is estimated. It is shown that for films with a thickness below about 100 nm and for moderate laser intensities it may be comparable with or even dominate over electron-ion collisions and inner ionization.

physics.optics↗