A5055781007- Laser-Plasma Interactions and Diagnostics
- Laser-induced spectroscopy and plasma
- Nuclear Physics and Applications
- Fusion materials and technologies
- High-pressure geophysics and materials
- Energetic Materials and Combustion
- Laser Design and Applications
- Laser-Matter Interactions and Applications
- Nuclear Materials and Properties
- Magnetic confinement fusion research
- Advanced Optical Sensing Technologies
- High-Velocity Impact and Material Behavior
- Nuclear reactor physics and engineering
- Advanced X-ray and CT Imaging
- Combustion and Detonation Processes
- Chemical and Environmental Engineering Research
- Radioactive contamination and transfer
- Optical Systems and Laser Technology
- Particle Accelerators and Free-Electron Lasers
- Fluid Dynamics and Turbulent Flows
- Structural Response to Dynamic Loads
- Fluid Dynamics and Heat Transfer
- Advanced SAR Imaging Techniques
- Pulsed Power Technology Applications
- Cold Fusion and Nuclear Reactions
Los Alamos National Laboratory
2018-2025
Lawrence Livermore National Laboratory
2001-2022
General Atomics (United States)
2019
Fusion (United States)
2014
University of Wisconsin–Madison
2014
Fusion Academy
2014
Association of Research Libraries
2001
National Technical Information Service
2001
Office of Scientific and Technical Information
2001
Double shell inertial confinement fusion is a concept for achieving robust thermonuclear burn that uses dense metal shells to compress deuterium-tritium (DT) fuel conditions. implosions are typically indirectly driven and involve target consists of low-Z ablator, foam layer, high-Z pusher surrounding the DT fuel. The goal campaign achieve volumetric as radiation losses from trapped by opaque shell. overall performance double relies on efficient collisional transfer kinetic energy between...
Advances in target fabrication have made double shell capsule implosions a viable platform to study burning fusion plasmas. Central the is high-Z (e.g., Au) metal pusher that accesses volume-burn regime by reducing radiative losses through radiation trapping and compressing uniform fuel volume at reduced velocities. A implosion relies on series of energy transfer processes starting from x-ray absorption outer shell, followed kinetic an inner finally conversion internal energy. We present...
Double shell targets are an alternative ignition platform for inertial confinement fusion. One design consideration double is the choice of inner material to help trap radiation emitted by hot fuel aid ignition. Materials such as molybdenum and tungsten interest layer targets. While has a lower density that could inhibit instability growth allow radiography code benchmarking, higher provide more compression confinement. These tradeoffs have been explored using optimized designs each...
Double shell capsule implosions are an alternative approach to achieving alpha heating on the National Ignition Facility. Current machining techniques construct outer as two hemispheres that glued together, and deuterium tritium (DT) liquid inside inner will be injected by a fill tube. These features introduce asymmetries jetting may disrupt confinement of DT fuel if not carefully controlled. Simulations indicate in order achieve high yields laboratory, these well susceptibility...
Double shell targets are a promising potential avenue to obtain robust neutron yield at current laser facilities. Similar single designs, double shells require the symmetric implosion of an ablator in order uniformly compress and heat fuel volume, with goal achieving thermonuclear burn. Significant differences between include usage aluminum as well reverse ramp pulse. In addition, different convergence than for ignition. Numerical studies various energies comparisons experimental outcomes...
Implosions of Hohlraum-driven double shell targets as an alternative inertial confinement fusion concept are underway at the National Ignition Facility. The system relies on a series energy transfer processes starting from thermal x-ray absorption by outer shell, followed collisional kinetic to heavy metal inner and finally, conversion internal deuterium-tritium fuel. During each these stages, low-mode asymmetries can act reduce ideal efficiency degrading performance. Mechanisms, such hard...
Double shell capsules provide an attractive option in inertial confinement fusion experiments due to their potential for achieving a low-convergence, robust burn. However, these designs suffer from symmetry degradation and accompanying reduced fuel the currently necessary joint between two hemispheres of outer shell. The gap widens as result excess ablation pressure produced by x rays that penetrate during drive phase, this perturbation grows imprints onto inner collision. xRAGE Eulerian...
Abstract Access to reliable, clean energy sources is a major concern for national security. Much research focused on the “grand challenge” of producing via controlled fusion reactions in laboratory setting. For experiments, specifically inertial confinement (ICF), produce sufficient energy, ICF fuel need become self‐sustaining and burn deuterium‐tritium (DT) efficiently. The recent record‐breaking NIF ignition shot was able achieve this goal as well more than used drive experiment. This...
The outer surface of the high-Z inner shell in double configuration inertial confinement fusion experiments experiences Rayleigh–Taylor instability growth during implosion process due to inverted density and pressure gradients between a highly compressed foam interstitial layer accelerating dense shell. Graded layers have long been known reduce rates. In this study, we employ high-fidelity radiation hydrodynamic simulations demonstrate improved stability when grading beryllium into tungsten....
Pushered Single Shells (PSSs) are an alternative approach to Inertial Confinement Fusion implosions that employ high-Z materials in the innermost capsule layer (pusher) as a means enhance radiation trapping and lower core ignition requirements. However, adding can also increase losses due mix, provide extra tamping, make emission opaque x-ray diagnostics. The first PSS performed on National Ignition Facility use plastic ablators with germanium (Ge) dopant surrogate pusher isolate effects of...
Inertial confinement fusion (ICF) and high-energy density (HED) physics experiments experience complicated forcing for instability growth mix due to the ubiquitous presence of multiple shocks interacting with perturbations on material interfaces. One common driver is successive from same direction. However, there a severe lack analytic work modeling validation same-sided since they are extremely difficult achieve conventional (non-HED) drivers. Successive access large parameter space;...
The CD Mix campaign has given a detailed explination of the mix mechanics in current ignition capsule designs by investigating relationship between material mixing, shell-fuel interfaces, and change thermonuclear yield deuterated layer capsule. Alternative scenarios include use double shell that incorporate high-Z Simulations are conducted on proposed platform using ARES code scaled design partially reduced glass design. This allows for inclusion deuterium inner surface pusher similar to...
Converting and using the National Ignition Facility (NIF) to deliver 527 nm light instead of its current 351 would allow laser more energy power ignition targets. We update previous target design work reflect contemporary designs high-density carbon capsules low density helium gas filled Hohlraums. extend single shell capsule based on experimental results higher also explore double capsules, both driven by green light. These studies were completed detailed pulse shapes found for targets that...
AbstractAbstractA parameter study of a proposed inertial fusion energy chamber is performed. A baseline case 6-m-radius filled with 6 μg/cm3 xenon studied in detail. The maximum first-wall temperature shown to be 1136 K an overpressure 5.83 + 10−3 MPa. sweep conducted for the by adjusting radius from 4 14 m, changing gas density and fill argon. results set limits on different gases densities. Analytic fits simulation allow their use overall engine design trade-off studies.
This work provides a numerical study of how double shell capsule deformations caused by drive asymmetries and fabrication imperfections affect implosion symmetry neutron yield. Hydrodynamics simulations are performed in two dimensions focus on low-mode that corresponding the Hohlraum drive, component offsets, ablator joint gaps. By providing parameter these features, our goal is to understand dominant sources for inner deformation yield degradation. The discussed capsules composed an...