Electric field dynamics and ion acceleration in the self-channeling of a superintense laser pulse

Details Electric field dynamics and ion acceleration in the self-channeling of a superintense laser pulse Electric field dynamics and ion acceleration in the self-channeling of a superintense laser pulse

2007-01-11

arxiv.org/abs/physics/0701139v4

Physics

Plasma Physics

9 pages, 7 figures, final revised version, to appear on Plasma Phys. Contr. Fus., special issue on "Laser and Plasma Accelerat

Scientific paper

The dynamics of electric field generation and radial acceleration of ions by a laser pulse of relativistic intensity propagating in an underdense plasma has been investigated using an one-dimensional electrostatic, ponderomotive model developed to interpret experimental measurements of electric fields [S. Kar et al, New J. Phys. *9*, 402 (2007)]. Ions are spatially focused at the edge of the charge-displacement channel, leading to hydrodynamical breaking, which in turns causes the heating of electrons and an "echo" effect in the electric field. The onset of complete electron depletion in the central region of the channel leads to a smooth transition to a "Coulomb explosion" regime and a saturation of ion acceleration.

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