lasnex simulations of the classical and laser-driven Rayleigh-Taylor instability
1990; American Physical Society; Volume: 42; Issue: 8 Linguagem: Inglês
10.1103/physreva.42.4944
ISSN1538-4446
Autores Tópico(s)Laser-Matter Interactions and Applications
ResumoWe present the results of two-dimensional lasnex simulations of the classical and laser-driven Rayleigh-Taylor instability. Our growth rates and eigenmodes for classical two- and three-fluid problems agree closely with the exact analytic expressions. We illustrate in several examples how perturbations feed through from one interface to another. For targets driven by a 1/4-\ensuremath{\mu}m laser at I=2\ifmmode\times\else\texttimes\fi{}${10}^{14}$ W/${\mathrm{cm}}^{2}$ our growth rates are 40--80 % of the classical case rates for wavelengths between 5 and 100 \ensuremath{\mu}m. We find that radiation transport has a stabilizing effect on the Rayleigh-Taylor instability, particularly at high intensities. A brief comparison with a laser-driven experiment is also presented.
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