UWFDM-1012 An Investigation of the Opacity of High-Z Mixtures and Implications for ICF Hohlraum Design
نویسنده
چکیده
We use an Unresolved Transition Array (UTA) model to investigate the opacities of high-Z materials and their mixtures which are of interest to indirect-drive ICF hohlraum design. In particular, we report on calculated opacities for pure Au, Gd, Sm, as well as Au-Sm, and Au-Gd mixtures. Our results indicate that mixtures of Au-Gd and AuSm can produce a significant enhancement in the Rosseland mean opacity. Radiationhydrodynamics simulations of Au radiation burnthrough are also presented, and compared with NOVA experimental data.
منابع مشابه
Target design for high fusion yield with the double Z-pinch-driven hohlrauma..
A key demonstration on the path to inertial fusion energy is the achievement of high fusion yield !hundreds of MJ" and high target gain. Toward this goal, an indirect-drive high-yield inertial confinement fusion !ICF" target involving two Z-pinch x-ray sources heating a central secondary hohlraum is described by Hammer et al. #Phys. Plasmas 6, 2129 !1999"$. In subsequent research at Sandia Nati...
متن کاملProgress in indirect drive hohlraum design for laser ICF. Self-generated magnetic field and non-local heat flux : simulation with 2D radiation-hydrodynamic code and experimental validation
In indirect drive scheme, the laser light is converted in X-rays in a hohlraum made of a high-Z material. Part of this radiation flux is absorbed by a microballoon, filled with DT, and placed in the center of the hohlraum, leading to its implosion, ignition and burn. The right control of radiation fluxes, spectrum and energy, is then an issue for the LMJ target design. The presentation will giv...
متن کاملDesign of dynamic Hohlraum opacity samples to increase measured sample density on Z.
We are attempting to measure the transmission of iron on Z at plasma temperatures and densities relevant to the solar radiation and convection zone boundary. The opacity data published by us to date has been taken at an electron density about a factor of 10 below the 9×10(22)/cm(3) electron density of this boundary. We present results of two-dimensional (2D) simulations of the heating and expan...
متن کاملTime- and space-resolved spectroscopy of dynamic hohlraum interiors
A dynamic hohlraum is created when an annular z-pinch plasma implodes onto a cylindrical 0.014 g/cc 6-mm-diameter CH2 foam. The impact launches a radiating shock that propagates toward the axis at w350 mm/ns. The radiation trapped by the tungsten z-pinch plasma forms a w200 eV hohlraum that provides X-rays for indirect drive inertial confinement fusion capsule implosion experiments. We are deve...
متن کاملبررسی بهره همجوشی اشتعال سریع با هدفهای مخروطی
Fast ignition is a new scheme for inertial confinement fusion (ICF). In this scheme, at first the interaction of ultraintense laser beam with the hohlraum wall surrounding a capsule containing deuterium-tritium (D-T) fuel causes implosion and compression of fuel to high density and then laser produced protons penetrate in the compressed fuel and deposit their energy in it as the ignition hot sp...
متن کامل