This article is cited in 4 papers

Interaction of laser radiation with matter. Laser plasma

Asymptotic theory of ponderomotive dynamics of an electron in the field of a focused relativistically intense electromagnetic envelope

O. B. Shiryaev<sup>ab

a</sup> Prokhorov General Physics Institute of the Russian Academy of Sciences, Moscow
^b Russian National Research Medical University named after N. I. Pirogov, Moscow

Abstract: Based on a formal asymptotic solution of Maxwell's equations for a field propagating in a vacuum and of the relativistic Newton equation for an electron driven by the corresponding Lorentz force, we construct a description of the relativistic ponderomotive dynamics of an electron in the field of an intense focused electromagnetic envelope. A small parameter for the asymptotic expansion is proportional to the ratio of the radiation wavelength to the focal spot radius. Using the obtained averaged model of ponderomotive dynamics, electron beam scattering patterns are plotted with regard to an angle relative to the electromagnetic field propagation axis for laser pulses with a Gaussian transverse intensity distribution, as well as the energy spectra of scattered electrons corresponding to individual ranges of this angle. Scattered particles are absent in some ranges of the polar angle.

Keywords: relativistic intensity, ponderomotive force, laser acceleration of electrons.

Received: 21.03.2019
Revised: 24.06.2019

 English version: Quantum Electronics, 2019, 49:10, 936–946

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