Dynamics and radiation effects for charges propagating in ultraintense laser fields

Dynamics and radiation effects for charges propagating in laser fields described by pulses of electromagnetic plane waves and Gaussian beams are discussed on the basis of classical electrodynamics. The dynamics of the charge motion in the case of pulsed Gaussian beam is evaluated numerically using the corresponding canonical Hamiltonian system with well-known relativistic Hamiltonian of a charge placed in electromagnetic field. The dynamics of electron motion and its spectrum of the radiation intensity obtained for the Gaussian beam incidence are compared with the exact solution data for the case of the incident pulse of the plane electromagnetic wave. We compare these results for the canonical case of propagating pulses with the Gaussian envelope time-dependence.