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

Meaney, K. D.; Kim, Y.; Hoffman, N. M.; Mohamed, Z. L.; Taitano, W. T.; Herrmann, H. W.; Geppert-Kleinrath, H.; Springstead, M. P.; Zylstra, A. B.; Leatherland, A.; Wilson, L.; Glebov, V. Yu.; Forrest, C.

doi:10.1103/PhysRevE.110.055203

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

Journal Article · 08 November 2024 · Physical Review. E

DOI: https://doi.org/10.1103/PhysRevE.110.055203 · OSTI ID:2476729

;

; Zylstra, A. B.;

; Wilson, L.; Glebov, V. Yu.; Forrest, C.

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 ( $CR \sim 12$ ) 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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Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: 89233218CNA000001

OSTI ID:: 2476729

Journal Information:: Physical Review. E, Journal Name: Physical Review. E Journal Issue: 5 Vol. 110; ISSN PLEEE8; ISSN 2470-0045

Publisher:: American Physical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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