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Ion dynamics and coherent structure formation following laser pulse self-channeling

Macchi, Andrea and Bigongiari, Alessandra and Ceccherini, Francesco and Cornolti, Fulvio and Liseikina, Tatiana V. and Borghesi, Marco and Kar, Satyabrata and Romaganani, Lorenzo (2007) Ion dynamics and coherent structure formation following laser pulse self-channeling. Plasma Physics and Controlled Fusion . ISSN 1361-6587

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SUMMARY The propagation of a superintense laser pulse in an underdense, inhomogeneous plasma has been studied numerically by two-dimensional particle-in-cell 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 soliton- and vortex-like structures is observed.

Item Type: Article
Additional Information: Imported from arXiv
Subjects: Area02 - Scienze fisiche > FIS/01 - Fisica sperimentale
Divisions: Dipartimenti (from 2013) > DIPARTIMENTO DI FISICA
Depositing User: dott.ssa Sandra Faita
Date Deposited: 06 Aug 2013 10:18
Last Modified: 06 Aug 2013 10:18
URI: http://eprints.adm.unipi.it/id/eprint/1322

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