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Large-scale high-resolution simulations of high gain direct-drive inertial confinement fusion targets

Phys. Plasmas 11, 2716 (2004); doi:10.1063/1.1667485

Published 23 April 2004

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Andrew J. Schmitt, D. G. Colombant, A. L. Velikovich, and S. T. Zalesak
Plasma Physics Division, Naval Research Laboratory, Washington, D.C. 20375-5346

J. H. Gardner and D. E. Fyfe
LCP&FD, Naval Research Laboratory, Washington, D.C. 20375

N. Metzler
SAIC, McLean, Virginia 22101
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., [script l] = 2–256) of perturbations from compression to acceleration, and then to stagnation and burn. The development of the structure in these multimode 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 one-dimensional 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. ©2004 American Institute of Physics.
History: Received 30 October 2003; accepted 13 January 2004; published 23 April 2004
Permalink: http://link.aip.org/link/?PHPAEN/11/2716/1

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KEYWORDS and PACS

Keywords
PACS
  • 52.57.Bc
    Target design and fabrication for laser ICF
  • 52.50.Jm
    Plasma production and heating by laser beams including laser–foil, laser–cluster, etc
  • 52.35.Qz
    Plasma microinstabilities including ion-acoustic, two-stream, loss-cone, beam-plasma, drift, ion- or electron-cyclotron instabilities, etc
  • 52.65.-y
    Plasma simulation
  • 28.52.Fa
    Fusion reactor materials
  • YEAR: 2004

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PUBLICATION DATA

ISSN:
1070-664X (print)   1089-7674 (online)
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REFERENCES (25)
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