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DOE OSTI · 2476729

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

Meaney, K. D. (ORCID:0000000311427360)·Kim, Y. (ORCID:0000000150020964)·Hoffman, N. M. (ORCID:000000030178767X)·Mohamed, Z. L. (ORCID:0000000170113922)·Taitano, W. T. (ORCID:0000000223690935)·Herrmann, H. W. (ORCID:0000000250925373)·Geppert-Kleinrath, H. (ORCID:000000029350144X)·Springstead, M. P. (ORCID:0000000183050166)·Zylstra, A. B.·Leatherland, A. (ORCID:0000000235677893)·Wilson, L.·Glebov, V. Yu.·Forrest, C.
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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. Published by the American Physical Society 2024

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Meaney, K. D. (ORCID:0000000311427360), Kim, Y. (ORCID:0000000150020964), Hoffman, N. M. (ORCID:000000030178767X), Mohamed, Z. L. (ORCID:0000000170113922), Taitano, W. T. (ORCID:0000000223690935), Herrmann, H. W. (ORCID:0000000250925373), Geppert-Kleinrath, H. (ORCID:000000029350144X), Springstead, M. P. (ORCID:0000000183050166), Zylstra, A. B., Leatherland, A. (ORCID:0000000235677893), Wilson, L., Glebov, V. Yu., Forrest, C.. 2024-11-08. Separated reactant mix width across diffusion-dominated and hydrodynamically dominated interface mix in inertial confinement fusion implosions. https://doi.org/10.1103/physreve.110.055203

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