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Filamented plasmas in laser ablation of solids
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SYSNO ASEP 0334667 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Filamented plasmas in laser ablation of solids Title Filamentace plasmatu v laserové ablaci pevných látek Author(s) Davies, J.R. (PT)
Fajardo, M. (PT)
Kozlová, Michaela (FZU-D) RID, ORCID
Mocek, Tomáš (FZU-D) RID, ORCID, SAI
Polan, Jiří (FZU-D)
Rus, Bedřich (FZU-D) ORCIDSource Title Plasma Physics and Controlled Fusion. - : Institute of Physics Publishing - ISSN 0741-3335
Roč. 51, č. 3 (2009), 035013/1-035013/12Number of pages 12 s. Language eng - English Country GB - United Kingdom Keywords magneto-hydrodynamic modelling ; perturbation ; filaments ; x-ray ; plasma Subject RIV BH - Optics, Masers, Lasers CEZ AV0Z10100523 - FZU-D (2005-2011) UT WOS 000263382300014 DOI 10.1088/0741-3335/51/3/035013 Annotation We report results from laser-solid experiments at PALS using an x-ray laser probe with a pulse length of 0.1 ns and a wavelength of 21.2 nm. A laser with a pulse length of 0.3 ns, a peak intensity of up to 5 x 10(13) W cm(-2) and a wavelength of 1.3 mu m was focused to a 0.15 mm wide line on 3 mm long zinc and 1 mm long iron targets and the probe was passed along the length of the plasma formed. The results show plasma 'hairs', or filaments, appearing only below the critical density, 0.1 ns before the peak of the laser pulse. The plasma around the critical density was clearly imaged and remained uniform. Magneto-hydrodynamic modelling indicates that this is caused by a magnetic field that diffuses from the critical surface, where it is generated, leading to a magnetic pressure comparable to the plasma pressure below the critical density. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2010
Number of the records: 1