Simulations of strong radiatively cooled magnetic reconnection for the MARZ campaign on Z
Abstract not provided.
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Jump to search filtersDeep-Learning-Enabled Assessment of Magnetic Confinement in Magnetized Liner Inertial Fusion
Abstract not provided.
Developing a platform to enable higher input parameters in Magnetized Liner Inertial Fusion
Abstract not provided.
Deep-learning-enabled Bayesian inference of fuel magnetization in magnetized liner inertial fusion
Physics of Plasmas
Fuel magnetization in magneto-inertial fusion (MIF) experiments improves charged burn product confinement, reducing requirements on fuel areal density and pressure to achieve self-heating. By elongating the path length of 1.01 MeV tritons produced in a pure deuterium fusion plasma, magnetization enhances the probability for deuterium-tritium reactions producing 11.8−17.1 MeV neutrons. Nuclear diagnostics thus enable a sensitive probe of magnetization. Characterization of magnetization, including uncertainty quantification, is crucial for understanding the physics governing target performance in MIF platforms, such as magnetized liner inertial fusion (MagLIF) experiments conducted at Sandia National Laboratories, Z-facility. We demonstrate a deep-learned surrogate of a physics-based model of nuclear measurements. A single model evaluation is reduced from CPU hours on a high-performance computing cluster down to ms on a laptop. This enables a Bayesian inference of magnetization, rigorously accounting for uncertainties from surrogate modeling and noisy nuclear measurements. The approach is validated by testing on synthetic data and comparing with a previous study. We analyze a series of MagLIF experiments systematically varying preheat, resulting in the first ever systematic experimental study of magnetic confinement properties of the fuel plasma as a function of fundamental inputs on any neutron-producing MIF platform. We demonstrate that magnetization decreases from B ∼0.5 to B MG cm as laser preheat energy deposited increases from preheat ∼460 J to E preheat ∼1.4 kJ. This trend is consistent with 2D LASNEX simulations showing Nernst advection of the magnetic field out of the hot fuel and diffusion into the target liner.
MagLIF on NIF Q3/Q4 FY21 proposals
Abstract not provided.
Increased preheat energy to MagLIF targets with cryogenic cooling
Abstract not provided.
Measuring Mix in MagLIF Experiments at the NIF
Abstract not provided.
Deep-Learning-Enabled Assessment of Magnetic Confinement in Magnetized Liner Inertial Fusion
Abstract not provided.
Opportunities and challenges in Magnetized Liner Inertial Fusion
Abstract not provided.
Developing a platform to enable parameter scaling studies in Magnetized Liner Inertial Fusion experiments
Abstract not provided.
Developing an extended convolute post to drive an X-pinch for radiography at the Z facility
Abstract not provided.
Investigating at-scale MagLIF preheat on the NIF
Abstract not provided.
Inertial confinement fusion - Experimental physics: Z-pinch and magnetized liner inertial fusion
Encyclopedia of Nuclear Energy
Abstract not provided.
An overview of magneto-inertial fusion on the Z Machine at Sandia National Laboratories
Abstract not provided.
An overview of magneto-inertial fusion on the Z Machine at Sandia National Laboratories
Abstract not provided.
A time-resolved, in-chamber x-ray pinhole imager for Z
Review of Scientific Instruments
We have commissioned a new time-resolved, x-ray imaging diagnostic for the Z facility. The primary intended application is for diagnosing the stagnation behavior of Magnetized Liner Inertial Fusion (MagLIF) and similar targets. We have a variety of imaging systems at Z, both time-integrated and time-resolved, that provide valuable x-ray imaging information, but no system at Z up to this time provides a combined high-resolution imaging with multi-frame time resolution; this new diagnostic, called TRICXI for Time Resolved In-Chamber X-ray Imager, is meant to provide time-resolved spatial imaging with high resolution. The multi-frame camera consists of a microchannel plate camera. A key component to achieving the design goals is to place the instrument inside the Z vacuum chamber within 2 m of the load, which necessitates a considerable amount of x-ray shielding as well as a specially designed, independent vacuum system. A demonstration of the imaging capability for a series of MagLIF shots is presented. Predictions are given for resolution and relative image irradiance to guide experimenters in choosing the desired configuration for their experiments.
IMPROVED PERFORMANCE OF MAGNETIZED LINER INERTIAL FUSION EXPERIMENTS WITH HIGH-ENERGY LOW-MIX LASER PREHEAT CONFIGURATIONS
Abstract not provided.
Exploring the Spectral Signatures of Inner-shell Excitation Mechanisms in Nonthermal Z-pinch Plasmas
Abstract not provided.
Upgrading Wolter Imagers for X-Ray Diagnostics in the Z Pulsed-Power Facility at Sandia National Laboratories
Abstract not provided.
High-resolution imaging of warm x-ray sources with a Wolter optic on the Z Machine
Abstract not provided.
A Time-Resolved In-Chamber X-Ray Pin Hole Imager for Z
Abstract not provided.
Sedov-Taylor-like blast waves as an in-situ measure of energy transport in laboratory experiments
Abstract not provided.
Investigating hydrodynamic instabilities in high energy density systems on the Z Machine
Abstract not provided.
Narrowband Self-Emission X-ray Imaging of MagLIF Targets on Z
Abstract not provided.
An nToF Suite to Measure Temperature at the Z-Facility
Abstract not provided.
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