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Showing 1 to 20 of 25 for “"Z-pinch"”.
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Axial Evolution of a Sheared-Flow-Stabilized Z Pinch
The Fusion Z-pinch Experiment (FuZE) is a sheared-flow-stabilized Z pinch based on the ZaP and ZaP-HD experiments. The FuZE device generates neutron-producing, 50-cm-long Z pinches formed from plasma accelerated through coaxial electrodes. The Z pinches are sustained between a nose cone at the tip …
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An Investigation of Tungsten-Based Z-Pinch Planar Wire Array and Benchmarking Experiments
Wire array z-pinches provide an accessible means to research plasmas of high density and temperature and have valuable applications in the fields of inertial confinement fusion (ICF),astrophysics, and radiation studies. The purpose of this work is tungsten/aluminum z-pinch study and to aid in the …
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Theoretical and Experimental Studies of Radiation from Z-Pinch Complex Wire Arrays and Applications
… higher efficient radiators, particularly in z-pinch plasmas, and their applications. This goal is a major focus of this dissertation and implements both theoretical and experimental tools in the process. The theoretical tools involve the Wire Ablation Dynamics Model (WADM) to infer z-pinch …
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Characterizing the Movement of Contaminant Liquid Metal Particles when subject to Electric Pulses, within the Context of Z-pinch Fusion Reactors
… liquid metal surfaces, in Z-pinch fusion reactors. These ejecta present significant contamination risks to plasma fuel in fusion reactors. The study employed a liquid electrode setup, exposing a eutectic tin-bismuth mixture to high-current pulses. Particle motion was tracked …
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Experimental Investigation of Sheared Flow Stabilization of Z-pinches
The wire array z-pinch is an efficient x-ray source [1] which has been proposed for use in indirect drive inertial confinement fusion schemes [2]. The z-pinch can become a more efficient x-ray source if its stability is improved. Cylindrical wire array z-pinch experiments where the Rayleigh-Taylor …
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Supersonic self-similar screw-pinch plasma implosions
… and an entrained axial magnetic field (screw-pinch). These solutions represent a complete generalization of previous works done on the Z-pinch and $\Theta$-pinch schemes. The solutions presented herein represent a screw-pinch plasma with a diffuse current profile. Four separate plasma …
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Theoretical prediction of [tau]E and [beta]⁻ in a large aspect ratio LDX
… of an ideal point dipole or a hard core Z-pinch magnetic configuration. The point dipole and hard core Z-pinch configurations share similar physics and may be respectively considered to be the zero and large aspect ratio approximations to LDX. The present work focuses on a hard-core Z-pinch …
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Modeling the Dynamics of Liquid Metal in Fusion Liquid Walls Using Maxwell-Navier-Stokes Equations
… of the liquid metal wall's free surface in Z-pinch fusion devices. This research is conducted in the context of utilizing liquid metals as plasma-facing components in fusion reactors. In the Z-pinch fusion process, electric current travels through a plasma column and enters into a pool of …
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Using Machine Learning to Generate a Surrogate Model for Plasma-Surface Interactions
… of the sheared-flow-stabilized (SFS) z-pinch fusion experiment at the University of Washington for graphite and tungsten walls. The trained network then approximates plasma-surface interactions for conditions relevant to the SFS z-pinch fusion experiment. Connecting this model to a …
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Plasma Electron Density Measurement Using Homodyne and Heterodyne Interferometers
… systems namely Tokamak and flow through Z-pinch device.
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Observation and Characterization of Trends in the Ionization of the Warm Absorber Photoionized Plasma Experiment at Z
… x-ray radiation generated by the collapse of a z-pinch to drive neon gas, creating a photoionized plasma to study in the laboratory. The Warm Absorber Photoionized Plasma Experiment uses a cm-scale gas cell placed several centimeters from the z-pinch to contain neon gas of atom number densities …
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Development of a Single-Crystal X-ray Spectropolarimeter and Application to Wire-Array Z-pinches
Energetic direction electrons are common in z-pinch plasmas. Such energetic electron beams have been measured directly after exiting the pinch region, but are usually inferred from the observation of hard x-ray bursts. Spectroscopy is the way to diagnose plasmas, and because anisotropies such as …
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Theory of Wave Formation in Liquid Metal
… metal may improve the operational lifetime of Z-pinches. The LEX is based upon the University of Washington's High Energy Density Z-pinch (ZaP-HD) and Fusion Z-Pinch Experiments (FuZE) and replaces one solid metal electrode with a liquid metal electrode. During the operation of the ZaP-HD and …
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Theoretical Studies of L-shell X-ray Line Polarization and M-shell X-ray Spectroscopic Emission from Highly Ionized Xenon Ions
… and the second is a reversed polarity gas-puff Z-pinch. The difference between spectra was mostly caused by non-thermal effects manifesting in the Z-pinch as characteristic L-shell Xe lines. HED plasmas are able to produce beams of non-Maxwellian electrons that may cause partially polarized x-ray …
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Precision electron flow measurements in a disk transmission line
In large z-pinch drivers, it is ideal to minimize the electron flow near the load while maintaining a low inductance as to not suffer a decrease in system efficiency. While inductance and electron flow are normally competing requirements, transmission lines with a spatially varying gap in the …
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X-ray Radiative Signatures Influenced by Nonthermal Effects in High-Energy-Density Laboratory Plasmas of Mid-Atomic-Number Z-pinches
… and radiative properties in HED laboratory Z-pinch plasmas. Nonthermal effects describe the interaction of non-Maxwellian electrons or high-energy, external photons with inner-shell electrons in plasma ions, producing distinct radiative signatures which, for example, can diagnose the cooler …
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Measurements of Magnetic Compression and Melt of Electrically Thick Metals Driven by Lineal Current Densities Characteristic of Pulsed-Power-Driven Fusion Devices
… measurements of surface motion on z-pinches, revealing previously unobserved phenomena such as pre-melt radial magnetic compression followed by changes in acceleration corresponding to the solid-liquid phase transition of the surface of current-driven conductors. Experimental …
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Effects of hot electrons on the stability of a closed field line plasma
… the effects of hot electrons in cylindrical Z-pinch geometry. This linear approximation to a dipole preserves the essential feature of closed magnetic field lines. The absence of variations along the equilibrium magnetic field allows us to analytically derive an arbitrary total pressure …
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Characterization of Liquid Metal Free Surface Response to an Electromagnetic Impulse and Implications for Future Nuclear Fusion Devices
… tritium. When used as electrodes, such as in z-pinch devices, PFCs are subject to large current and magnetic flux densities resulting in large Lorentz forces. Furthermore, if the PFCs are LM, the forces excite wave behavior that has not previously been investigated. The work presented here first …
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Analytic calculations of MHD equilibria and of MHD stability boundaries in fusion plasmas
… studying the particular case of the hard-core Z-pinch.
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