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

被引：0
|
作者：
Meaney, K. D. [1 ]
Kim, Y. [1 ]
Hoffman, N. M. [1 ]
Mohamed, Z. L. [1 ]
Taitano, W. T. [1 ]
Herrmann, H. W. [1 ]
Geppert-Kleinrath, H. [1 ]
Springstead, M. P. [1 ]
Zylstra, A. B. [2 ]
Leatherland, A. [3 ]
Wilson, L. [3 ]
Glebov, V. Yu. [4 ]
Forrest, C. [4 ]
机构：
[1] Los Alamos Natl Lab, Los Alamos, NM 87545 USA
[2] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA
[3] Atom Weap Estab, Reading RG7 4PR, Berks, England
[4] Univ Rochester, Lab Laser Energet, Rochester, NY 14623 USA
来源：
PHYSICAL REVIEW E | 2024年 / 110卷 / 05期
关键词：
RANGE;
D O I：
10.1103/PhysRevE.110.055203
中图分类号：
O35 [流体力学]; O53 [等离子体物理学];
学科分类号：
070204 ; 080103 ; 080704 ;
摘要：
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 similar to 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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页数：11
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