Investigating Turbulent Mix in HEDLP Experiments

8th International Conference on Inertial Fusion Sciences and Applications

Flippo, K.A.^1 ; Doss, F.W.^1 ; DeVolder, B.^1 ; Fincke, J.R.^1 ; Loomis, E.N.^1 ; Kline, J.L.^1 ; Welser-Sherrill, L.^1

Los Alamos National Laboratory, PO Box 1663, Los Alamos

NM, United States^1

关键词: High energy densities;    Hydrodynamic instabilities;    Hydrodynamics codes;    Kelvin- helmholtz instabilities;    Laboratory plasma;    Material interfaces;    Richtmyer-Meshkov;    Turbulent mixing;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/688/1/012018/pdf
DOI  :  10.1088/1742-6596/688/1/012018

来源: IOP

【 摘 要 】

Mix is an important issue in High Energy Density Laboratory Plasmas (HEDLP), specifically Inertial Confinement Fusion (ICF) implosions. In ICF, shock waves traverse fuel capsule defects and material interfaces, and due to hydrodynamic instabilities transitioning into turbulence, these shocks can initiate mix between shell and fuel, degrading yield. To this end, a series of laser-driven mix experiments has been designed for the OMEGA and NIF laser facilities to investigate the turbulent mixing of materials proceeded by reshock and shear, which initiates Richtmyer-Meshkov and\or Kelvin-Helmholtz instabilities on a tracer layer. The experiments are designed to understand if the Besnard-Harlow-Rauenzahn (BHR) mix model that has been implemented in LANL's RAGE hydrodynamics code has coefficients that are properly determined for an HEDLP environment.