On very short and intense laser-plasma interactions

Abstract

We briefly report on some results regarding the impact of very short and intense laser pulses on a cold, low-density plasma initially at rest, and the consequent acceleration of plasma electrons to relativistic energies. Locally and for short times the pulse can be described by a transverse plane electromagnetic travelling-wave and the motion of the electrons by a purely Magneto-Fluido-Dynamical (MFD) model with a very simple dependence on the transverse electromagnetic potential, while the ions can be regarded as at rest; the Lorentz-Maxwell and continuity equations are reduced to the Hamilton equations of a Hamiltonian system with 1 degree of freedom, in the case of a plasma with constant initial density, or a collection of such systems otherwise. We can thus describe both the well-known "wakefield" behind the pulse and the recently predicted "slingshot effect", i.e. the backward expulsion of high energy electrons just after the laser pulse has hit the surface of the plasma.

Latex file, 15 pages, 6 figures

References in corpus (2)

• On plane waves in diluted relativistic cold plasmas
• A "slingshot" laser-driven acceleration mechanism of plasma electrons

Cited by in corpus (6)

• Travelling waves and a fruitful `time' reparametrization in relativistic electrodynamics
• On the impact of short laser pulses on cold diluted plasmas
• Hydrodynamic impacts of short laser pulses on plasmas
• Travelling waves and light-front approach in relativistic electrodynamics
• Light-front approach to relativistic electrodynamics
• Hydrodynamic regime and cold plasmas hit by short laser pulses