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Showing 1 to 20 of 61 for “"Pulsed-Power"”.
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Studies of dielectric breakdown under pulsed power conditions
… higher energy storage capabilities for compact pulsed power applications, the electrical breakdown strength (BDS) of ceramic dielectrics, particularly titanium oxide and ceramic/epoxy composite materials, are being characterized and studied. Results of research to-date show that the dense …
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Pulsed-Power Busbar Design for High-Powered Applications
The use of high-powered electrical energy systems requires an efficient and capable means to move electrical energy from one location to another while reducing energy losses. This paper describes the design and construction process of a high-powered busbar system that is to be implemented in …
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Radiatively Cooled Magnetic Reconnection Experiments Driven by Pulsed Power
… peak, 300ns rise time current generated by the Z pulsed-power machine (Sandia National Labs). The load generates oppositely-directed supersonic, super-Alfvénic, collisional plasma flows with anti-parallel magnetic fields, that generate a reconnection layer (Lundquist number SL ∼ 100), in which the …
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Pulse shaping techniques for mega ampere current on Atlas pulsed power machine
Atlas is one of the world's largest pulsed power systems designed by Los Alamos National Laboratory (LANL) to perform high energy density experiments in support of weapon-physics and basic research programs. The current pulse generated by Atlas is a damped sinusoid that rises to nearly 30 MA in 6 …
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Pulsed Power Supply (and Operation) of the Cylindrical Inertial Electrostatic Confinement (IEC) Fusion Device
Made available in DSpace on 2017-07-06T18:59:00Z (GMT). No. of bitstreams: 3 Stubbers_Robert_A_MS.pdf: 39107463 bytes, checksum: 825927c8c3b1aec512d03c76c47a4b21 (MD5) Stubbers_Robert_A_MS_ABS.pdf: 641481 bytes, checksum: adec6ce817d06a2f6265dcdfc3702553 (MD5) license.txt: 4813 bytes, checksum: …
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Improved Resonant Converters with a Novel Control Strategy for High-Voltage Pulsed Power Supplies
The growing demand for high voltage, compact pulsed power supplies has gained great attention. It requires power supplies with high power density, low profile and high efficiency. In this thesis, topologies and techniques are investigated to meet and exceed these challenges. Non-isolation type …
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Comparison of high power impulse magnetron sputtering and modulated pulsed power sputtering for interconnect metallization
… directionality of ion flux. In this work, high power impulse magnetron sputtering (HiPIMS) and its derivative, modulated pulsed power (MPP) magnetron sputtering, with their claimed high ionization capability, are proposed for the application of barrier/seed layer deposition. Their plasma …
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Evaluation of diode-based non-linear transmission lines as microwave sources in compact pulsed power systems
… and defense related, for compact, high-power, and solid-state pulsed power sources. Of particular interest are pulsed power sources capable of generating high power microwaves (HPM). Diode-based nonlinear transmission lines (DNLTLs), while meeting the above criteria and widely used for …
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Magnetohydrodynamic Simulations of Fast Instability Development in Pulsed-Power--Driven Explosions and Implosions of Electrical Conductors
Recent concepts for controlled magneto-inertial fusion (MIF), such as magnetized liner inertial fusion (MagLIF), have suffered from magnetohydrodynamic (MHD) instabilities that lead to degradations in fusion yield. High levels of azimuthally-correlated MHD instability structures have been observed …
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Development of pulsed power sources using self-sustaining nonlinear transmission lines and high-voltage solid-state switches
… for short pulses capable of delivering high peak power is increasing by leaps and bounds over the last few decades. These pulses are garnering attraction from a wide variety of end-users associated with the military, medical, industry, etc. The diverse nature of the potential application spaces …
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Tribological and structural properties of titanium nitride and titanium aluminum nitride coatings deposited with modulated pulsed power magnetron sputtering
… of advanced coatings. Recent advances in high power magnetron sputtering (HPPMS) have shown to improve tribological properties of coatings. These coatings offer increased wear and oxidation resistance, which may facilitate the use of more economical materials in harsh applications. This study …
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Modeling gap closure within vaporizing transmission lines of pulsed power machines using particle-in-cell direct simulation Monte Carlo (PIC-DSMC)
In this thesis the applicability of two novel numerical methods - Event Splitting (ES) and Dual Grids - was studied for modeling gap closure within an overall DSMC-PIC approach. Gap closure is a difficult computational problem due to massive gradients in density and electrostatic properties, …
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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
… plasma physics and the development of pulsed-power-driven fusion generators.
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Pulsed MOSFET based linear transformer driver
Pulsed power flash radiography is a rapidly growing technology which involves the generation of intense and short bursts of electric pulses to generate high energy X-rays to inspect dense objects. The generation of fast transition, short width, repetitive pulses for effective output requires …
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High-performance compact gas filled spark switches
Gas filled spark switches are used extensively in pulsed power systems for their high rate of dV/dt, dI/dt, fast closing times with low jitter, and their high voltage and current capability. Recently there has been a renewed interest in designing spark switches that can operate with environmentally …
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The Effect of Anomalous Resistivity on the Electrothermal Instability
… platform to study the use of AR models in pulsed-power platforms. Using parameters from the Z-machine pulsed-power device, the incorporation of AR can increase a collisional-based resistivity by upwards of four orders of magnitude. The presence of current-carrying vacuum contaminant plasmas …
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Characterization of plasma conductivity by laser Thomson scattering in a high-voltage laser-triggered switch
… laser-triggered switches (HV-LTSs) are used in pulsed-power applications where low jitter and high current are required. The switches allow operation in the mega-ampere, megavolt regime while maintaining low insertion losses. Low inductance HV-LTS designs have shown discrepancies between modeled …
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Energy deposition into heavy gas plasma via pulsed inductive theta-pinch
… is to study the formation processes of a pulsed inductive plasma using heavy gases, specifically the coupling of stored capacitive energy into plasma via formation in a theta pinch coil. To aid in this research, the Missouri Plasmoid Experiment Mk. I (and later Mk. II) was created.</p> …
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Laboratory Experiments of High-Energy-Density Shocks in Magnetized Supersonic Plasma Flows
… these extreme astrophysical environments using pulsed-power driven high-energy-density-plasma laboratory experiments, by generating hypersonic, magnetized large-Reynolds’ number plasma flows, using exploding z-pinch wire arrays on the MAGPIE facility (1.4 MA peak current, 250 ns rise time). …
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Low temperature manufacturing of ferrite-epoxy inductor cores by micro-robotic deposition
… class of passive components in high and pulsed power electronics. Inductive type elements such as these are useful in energy storage, pulse shaping or filtering, and power conversion. These devices are made up of two major components; the conductive windings that provide the inductive …
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