Generation and Observation of Coherent, Long--Lived Structures in a Laser--Plasma Channel

Details Generation and Observation of Coherent, Long--Lived Structures in a Laser--Plasma Channel Generation and Observation of Coherent, Long--Lived Structures in a Laser--Plasma Channel

2007-02-21

arxiv.org/abs/physics/0702177v1

Physics

Plasma Physics

To appear in the Proceedings of the International Workshop "Collective phenomena in macroscopic systems", Villa Olmo, Como, It

Scientific paper

In recent experiments of laser pulse interaction at relativistic intensities with a low density plasma, the proton radiography technique showed evidence of long--lived field structures generated after the self-channeling of the laser pulse. We present 2D particle-in-cell simulations of this interaction regime, where the dynamics of similar structures has been resolved with high temporal and spatial resolution. An axially symmetrical field pattern, resembling both soliton-like and vortex structures, has been observed. A study of the physics of such structures and a comparison with experimental data is in progress.

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