79 research outputs found
Compact Autonomous Explosive-Driven Pulsed Power System Based on a Capacitive Energy Storage Charged by a High-Voltage Shock-Wave Ferromagnetic Generator
A new concept for constructing compact autonomous pulsed power systems is presented. This concept utilizes a high-voltage explosive-driven shock-wave ferromagnetic generator (FMG) as a charging source for capacitive energy storage. It has been experimentally demonstrated that miniature FMGs (22-25 cm³ in size and 84-95 g in mass) developed for these experiments can be successfully used to charge capacitor banks. The FMGs, containing Nd₂Fe₁₄B energy-carrying elements, provided pulsed powers of 35-45 kW in times ranging from 10 to 15 µs. A methodology was developed for digital simulation of the operation of the transverse FMG. Experimental results that were obtained are in a good agreement with the results of digital simulations
Interaction of particles in the near field and opposition effects in regolith-like surfaces
The 2004 Las Campanas/Lowell Observatory campaign II. Surface properties of Hayabusa target Asteroid 25143 Itokawa inferred from Hapke modeling
Growth and morphological study of copper oxide single crystals
Experiments on the growth of CuO single crystals by crystallization from flux in the CuO–Bi2O3– PbO–PbF2, CuO–Bi2O3–Li2O, CuO–Bi2O3–B2O3, CuO–BaO–Y2O3, and CuO–MOx systems (M = P, V, or Mo) have been performed. The best results were obtained in crystallization in the CuO–Bi2O3–PbF2 system: prismatic single crystals of platelet- and needlelike or isometric habit with dimensions up to 1 × 10 × 10, 1 × 1 × 20, or 6 × 6 × 8 mm, respectively, have been grown. The CuO crystals show polysynthetic twinning in the form of numerous alternating light and dark bands bound by systems of parallel straight lines on the {110} and {111} faces. A possible model of twinning associated with the Cu2O CuO transformation is considered
Polarimetric weak-localization effect in scattering of natural light in the region of small phase angles
Ferroelectric Generators
Ferroelectric Generators (FEGs) are compact single shot high voltage generators. They consist of a small explosive charge, ferroelectric ceramic, and an output circuit. There has been and continues to be active Small Business Innovative Research (SBIR), University, and Government programs to develop FEGs as very compact power supplies for a variety of loads including antennas, microwave sources, and detonator arrays. In this paper, we will report on some of our recent efforts to improve the performance of FEGs and to use them to drive various loads. © 2012 IEEE
The negative polarization of light scattered from particulate surfaces and of independently scattering particles
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The negative polarization of light scattered from particulate surfaces and of independently scattering particles
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