Ion dynamics and coherent structure formation following laser pulse self-channeling
نویسندگان
چکیده
The propagation of a superintense laser pulse in an underdense, inhomogeneous plasma has been studied numerically by two-dimensional particle-incell simulations on a time scale extending up to several picoseconds. The effects of the ion dynamics following the charge-displacement self-channeling of the laser pulse have been addressed. Radial ion acceleration leads to the “breaking” of the plasma channel walls, causing an inversion of the radial space-charge field and the filamentation of the laser pulse. At later times a number of long-lived, quasi-periodic field structures are observed and their dynamics is characterized with high resolution. Inside the plasma channel, a pattern of electric and magnetic fields resembling both solitonand vortexlike structures is observed. PACS numbers: 52.38.-r 52.38.Hb 52.38.Kd Submitted to: Plasma Phys. Control. Fusion Ion dynamics and coherent structure formation following laser pulse self-channeling 2
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