High pressure generation by hot electrons driven ablation

A previous model [Piriz et al. Phys. Plasmas 19, 122705 (2012)] for the ablation driven by the hot electrons generated in collisionless laser-plasma interactions in the framework of shock ignition is revisited. The impact of recent results indicating that for a laser wavelength λ = 0.35 μm the hot e...

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Veröffentlicht in:Physics of plasmas 2013-11, Vol.20 (11)
Hauptverfasser: Piriz, A. R., Piriz, S. A., Tahir, N. A.
Format: Artikel
Sprache:eng
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Zusammenfassung:A previous model [Piriz et al. Phys. Plasmas 19, 122705 (2012)] for the ablation driven by the hot electrons generated in collisionless laser-plasma interactions in the framework of shock ignition is revisited. The impact of recent results indicating that for a laser wavelength λ = 0.35 μm the hot electron temperature θH would be independent of the laser intensity I, on the resulting ablation pressure is considered. In comparison with the case when the scaling law θH∼(Iλ2)1/3 is assumed, the generation of the high pressures needed for driving the ignitor shock may be more demanding. Intensities above 1017 W/cm2 would be required for θH=25−30 keV.
ISSN:1070-664X
1089-7674
DOI:10.1063/1.4833680