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Large-Scale High-Resolution Simulations of High Gain Direct-Drive Inertial Confinement Fusion Targets.

Author: Andrew J SchmittD G ColombantA L VelikovichS T ZalesakJ H GardnerAll authors
Publisher: Ft. Belvoir : Defense Technical Information Center, MAY 2004.
Edition/Format:   eBook : English
Database:WorldCat
Summary:
Targets have been designed that produce moderate to high gain when directly driven by lasers. The intrinsic sensitivity of these targets to hydro instabilities is found using the FAST(2D) multidimensional radiation hydrocode [J.H. Gardner, A.J. Schmitt, J.P. Dahlburg, et al., Phys. Plasmas 5, 1935 (1998)], which simulates the simultaneous behavior of a large bandwidth (e.g., l = 2-256) of perturbations from  Read more...
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Details

Material Type: Internet resource
Document Type: Internet Resource
All Authors / Contributors: Andrew J Schmitt; D G Colombant; A L Velikovich; S T Zalesak; J H Gardner; D E Fyfe; N Metzler; NAVAL RESEARCH LAB WASHINGTON DC.
OCLC Number: 318688865
Notes: Journal article.
Description: 8 p. ; 23 x 29 cm.

Abstract:

Targets have been designed that produce moderate to high gain when directly driven by lasers. The intrinsic sensitivity of these targets to hydro instabilities is found using the FAST(2D) multidimensional radiation hydrocode [J.H. Gardner, A.J. Schmitt, J.P. Dahlburg, et al., Phys. Plasmas 5, 1935 (1998)], which simulates the simultaneous behavior of a large bandwidth (e.g., l = 2-256) of perturbations from compression to acceleration, and then to stagnation and burn. The development of the structure in these multi-mode simulations is benchmarked to theoretical analysis and single-mode calculations, which reveals the need to "renormalize" the simulation after compression. The simulations predict that a direct drive point design is expected to degrade significantly from its 1-D clean yield, yet still ignite and give appreciable gain. Simulations of high-gain pellets using a spike prepulse to inhibit Richtmyer-Meshkov growth show a considerable robustness, with high (> 100) gains possible even with nominal surface finishes and laser imprint.

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