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Showing 1 to 20 of 23 for “"pinches"”.
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Quasi-Steady Operation of Reversed Field Pinches
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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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The Velocity-Space Particle Loss in Field-Reversed Theta Pinches
A field-reversed theta pinch (FRTP) is a compact device for magnetic fusion. It has attracted much attention in recent years since encouraging experimental results have been obtained. However, the definite causes for the observed particle loss rate and plasma rotation are not well known. In this …
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Optical Pumping of Dye Lasers Using an Array of Plasma Pinches
… pumping source consisting of an array of plasma pinches is employed to pump, for the first time, a variety of dye lasers. The plasma pinch is formed in a hollow cylindrical shape by electrically discharging a high-energy capacitor bank ((TURN)14 kJ) through a device containing a few torrs of …
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Development of a Single-Crystal X-ray Spectropolarimeter and Application to Wire-Array Z-pinches
… has been built and tested on wire array z-pinches. Since each x-ray emitting region potentially has a different polarization, the spectropolarimeter must be spatially resolved to obtain meaningful spectra. With the use of a collimating series of slits, the single-crystal x-ray …
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X-ray Radiative Signatures Influenced by Nonthermal Effects in High-Energy-Density Laboratory Plasmas of Mid-Atomic-Number Z-pinches
… are presented on two types of pulsed-power Z-pinches of mid-atomic-number material using a suite of experimental, theoretical, and computational techniques. Two projects investigate the role of non-Maxwellian electrons in K-shell Fe, Cr, Ni, and L-shell Mo X-pinch plasmas produced on the Zebra …
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Axial Evolution of a Sheared-Flow-Stabilized Z Pinch
… 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 of the plasma gun and an end wall at the end of the assembly region flux conserver. The end wall geometry is modified from …
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Reducing the redundancy of financial ratios and assessing the stability of financial patterns
… Australian industrial firms along the lines of Pinches et al.’s (1973; 1975) study. The financial ratios used in prior Australian corporate failure studies were used to derive a reduced set of factors that was predictive of corporate failure (e.g., Castagna & Matolesy, 1981: Booth, 1983). These …
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The batch and continuous bacterial leaching kinetics of a refractory gold-bearing pyrite concentrate
… addition, the empirical logistic growth model (Pinches et al., 1987) is presented for both batch and continuous reactor description. The models are correlated with the experimental data. Three narrow size fractions of the pyrite concentrate were subjected to batch and continuous bacterial …
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Theoretical and Experimental Studies of Radiation from High-Z Multiply Ionized L-shell Ions with Emphasis on X-ray Line Polarization
… analysis of L-shell Ag spectra from X-pinches. The high electron temperature, density, and compact plasma source signatures of X-pinches are especially useful for HED plasma spectroscopy and x-ray line spectropolarimetry. The X-pinch experimental data are produced on the Nevada Terawatt …
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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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Dynamic wearable technology : designing and deploying small climbing robots for sensing and actuation on the human body
… Rovables, an on-clothing climbing robot that pinches fabric with magnetic rollers, and second, Epidermal Robots that use controlled suction to attach to the skin. The robots contain on-board navigation that uses inertial measurement units, motor encoders, and occasional ground truth from …
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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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Templated dewetting of thin solid films
… or grooves are close together, all the material pinches off into the topography. In the case of the inverted pyramids, this resulted in spatially ordered arrays of nanoparticles with narrow size distributions. A model that explains and predicts the effect of the relative geometry was developed …
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Verification and Validation of Magnetohydrodynamics Simulations of Electrically Exploded Conductors
Dense Z-pinches, magnetically-driven flyer plates, and electrically exploded wires and foils all take advantage of the extreme Lorentz forces and/or Ohmic heating generated by intense electrical current pulses through an initially solid conductor. Magnetohydrodynamics (MHD) simulations are used to …
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Theoretical and Experimental Studies of Radiation from Z-Pinch Complex Wire Arrays and Applications
… lasing might be occurring in wire array z-pinches. In connection to creating a uniform plasma column to measure lasing lines, the split double planar wire array is introduced and preliminary results discussed.
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Long and Short-Term Morphologic Evolution and Stratigraphic Architecture of a Transgressive Tidal Inlet, Little Pass Timbalier, Louisiana
… dib-elongate channel fill that thins seaward and pinches out at the location of inlet formation (storm breach). The inlet fill developed as a result of landward migration (dip elongate geometry) and associated with a transgressive barrier system differs from inlet fills developed along stable …
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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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The Hydrogeology of a Landfill Located in Fine-Grained Lacustrine Sediments in a Saline Discharge Area West of Grand Forks, North Dakota
… of saline water from the Dakota Aquifer, which pinches out just west of the landfill. The average TDS is about 25,000mg/L. The water is classified as a calcium, sodium, magnesium, chloride water and is high in sulfate.</p> <p>The leachate contains higher levels of iron, manganese, bicarbonate, …
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Finger force capability: measurement and prediction using anthropometric and myoelectric measures
Hand and finger force data are used in many settings, including industrial design and indicating progress during rehabilitation. The application of appropriate work design principles, during the design of tools and workstations that involve the use of the hand and fingers, may minimize upper …
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