Extreme ultraviolet interferometry of laser plasma material between the criticaland ablation surfaces

0361321 - FZÚ 2012 RIV GB eng J - Journal Article
Gartside, L.M.R. - Tallents, G. J. - Rossall, A.K. - Wagenaars, E. - Whittaker, D.S. - Kozlová, Michaela - Nejdl, Jaroslav - Sawicka, Magdalena - Polan, Jiří - Kalal, M. - Rus, Bedřich
Extreme ultraviolet interferometry of laser plasma material between the criticaland ablation surfaces.
High energy density physics. Roč. 7, č. 2 (2011), s. 91-97. ISSN 1574-1818. E-ISSN 1878-0563
R&D Projects: GA ČR GA202/08/1734; GA MŠMT(CZ) 7E09092
Institutional research plan: CEZ:AV0Z10100523
Keywords : extreme ultraviolet lasers * interferometry * radiation-hydrodynamics * transmission
Subject RIV: BH - Optics, Masers, Lasers
Impact factor: 1.595, year: 2011
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Interferometric probing using an extreme ultraviolet (EUV) laser has measured both transmission and phase information through laser-irradiated plastic (parylene-N C8H8) targets (thickness 350 nm). Unusually, the probe beam is incident longitudinally in approximately the same direction as the incident optical laser. Agreement of the experimental interferometry results has been obtained with twodimensional radiation hydrodynamic code (h2d) simulations of EUV (21.2 nm) probe transmissions and phase shifts. We show that the transmission of the EUV probe beam provides a measure of the rate of target ablation, as ablated plasma becomes close to transparent when the photon energy is less than the ionization energy of the predominate ion species.
Permanent Link: http://hdl.handle.net/11104/0198661