Dynamics of charge-displacement channeling in intense laser-plasma interactions

Details Dynamics of charge-displacement channeling in intense laser-plasma interactions Dynamics of charge-displacement channeling in intense laser-plasma interactions

2007-01-30

arxiv.org/abs/physics/0701332v3

Physics

Plasma Physics

5 figures, accepted for publication in New Journal of Physics

Scientific paper

The dynamics of transient electric fields generated by the interaction of high intensity laser pulses with underdense plasmas has been studied experimentally with the proton projection imaging technique. The formation of a charged channel, the propagation of its front edge and the late electric field evolution have been characterised with high temporal and spatial resolution. Particle-in-cell simulations and an electrostatic, ponderomotive model reproduce the experimental features and trace them back to the ponderomotive expulsion of electrons and the subsequent ion acceleration.

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