  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.
