The large scale hydrodynamics of laser accelerated thin disks (foils) are studied numerically using a 2-D, evolutionary Lagrangian fluid code. The laser and target parameters considered are relevant to direct drive laser fusion, in the classical interaction regime. Peculiar 2-D features observed in the experiments are recovered in the simulations; agreement with experimental data is found for a series of experiments concerning foils of different thickness. Scaling laws for the design of hydrodynamically equivalent experiments are tested, with the effects of non-scaled processes turning out to be fairly small, although observable, and qualitatively in agreement with the relevant theory. Simulations also indicate the adequacy of foil acceleration experiments driven by non-uniform (but controlled) beams to the quantitative study of the smoothing of the irradiation non-uniformities.

2-D Numerical Study of the Hydrodynamics of Laser Accelerated Thin Foils / Atzeni, Stefano. - In: PLASMA PHYSICS AND CONTROLLED FUSION. - ISSN 0741-3335. - STAMPA. - 31(1989), pp. 2137-2163. [10.1088/0741-3335/31/14/005]

2-D Numerical Study of the Hydrodynamics of Laser Accelerated Thin Foils

ATZENI, Stefano
1989

Abstract

The large scale hydrodynamics of laser accelerated thin disks (foils) are studied numerically using a 2-D, evolutionary Lagrangian fluid code. The laser and target parameters considered are relevant to direct drive laser fusion, in the classical interaction regime. Peculiar 2-D features observed in the experiments are recovered in the simulations; agreement with experimental data is found for a series of experiments concerning foils of different thickness. Scaling laws for the design of hydrodynamically equivalent experiments are tested, with the effects of non-scaled processes turning out to be fairly small, although observable, and qualitatively in agreement with the relevant theory. Simulations also indicate the adequacy of foil acceleration experiments driven by non-uniform (but controlled) beams to the quantitative study of the smoothing of the irradiation non-uniformities.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/105216
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