Separated reactant mix width across diffusion-dominated and hydrodynamically dominated interface mix in inertial confinement fusion implosions

Diffusion-dominated mix in inertial confinement fusion (ICF) is characterized where the majority of the mix occurs in the immediate fuel-shell interface while hydrodynamic-dominated mix pulls shell material from farther away into the central fuel. A thin (150 nm) separated reactants ICF mix platform is highly sensitive to the amount of mix from the first micron of shell-fuel interface. This fine-spatial resolution platform has revealed that material mix in moderate convergence (CR∼12) ICF implosions is dominated by a diffusion mechanism. This technique has now been expanded across a set of OMEGA ICF implosions, observing an increase in mix width and mix amount for cooler, slower, and more compressive implosions. Hydrodynamic simulations require a buoyancy-drag mix model to capture the increasing mix width, suggesting a transition between these two mix mechanisms.

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Publication Details

Journal
Physical review. E
Published
2024-11-08
DOI
https://doi.org/10.1103/physreve.110.055203
Citations
3
Primary Topic
Laser-Plasma Interactions and Diagnostics
Type
article
Field-Weighted Citation Impact
1.98

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article

Separated reactant mix width across diffusion-dominated and hydrodynamically dominated interface mix in inertial confinement fusion implosions

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3 citations
Physical review. E
Laser-Plasma Interactions and Diagnostics
1.98
article

Separated reactant mix width across diffusion-dominated and hydrodynamically dominated interface mix in inertial confinement fusion implosions

H. W. Herrmann, Michael Springstead, Y. Kim, V. Yu. Glebov, C. J. Forrest, N. M. Hoffman, William Taitano, L. A. Wilson, A. Leatherland, A. B. Zylstra, Z. L. Mohamed, K. D. Meaney, Hermann Geppert-Kleinrath
article en
3 citations

Abstract

Diffusion-dominated mix in inertial confinement fusion (ICF) is characterized where the majority of the mix occurs in the immediate fuel-shell interface while hydrodynamic-dominated mix pulls shell material from farther away into the central fuel. A thin (150 nm) separated reactants ICF mix platform is highly sensitive to the amount of mix from the first micron of shell-fuel interface. This fine-spatial resolution platform has revealed that material mix in moderate convergence (CR∼12) ICF implosions is dominated by a diffusion mechanism. This technique has now been expanded across a set of OMEGA ICF implosions, observing an increase in mix width and mix amount for cooler, slower, and more compressive implosions. Hydrodynamic simulations require a buoyancy-drag mix model to capture the increasing mix width, suggesting a transition between these two mix mechanisms.

Physical review. EVol. 110(5)
Lawrence Livermore National Laboratory (US), Los Alamos National Laboratory (US), AWE Nuclear Security Technologies (GB), Applied Energetics (United States) (US)
U.S. Department of Energy, National Nuclear Security Administration, Los Alamos National Laboratory
Openalex Percentile: Top 8%
Laser-Plasma Interactions and Diagnostics
1.98
DOIOpen Access PDFOpenAlex
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