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IEEE Transactions on Magnetics

Issue 1  Part 1 • Jan. 1997

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Displaying Results 1 - 25 of 119
  • [Transactions on Magnetics - Table of contents: includes content from 8th Electromagnetic Launch Technology (EML) Symposium]

    Publication Year: 1997
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    Freely Available from IEEE
  • Conference Author Index [8th Electromagnetic Launch Technology (EML) Symposium]

    Publication Year: 1997, Page(s):657 - 658
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    Freely Available from IEEE
  • An analysis of ballistic parameters/mechanisms affecting efficiency in electrothermal-chemical (ETC) guns

    Publication Year: 1997, Page(s):310 - 315
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (568 KB)

    Historically, electrothermal-chemical (ETC) gun firings have failed to achieve ballistic performance as measured by ballistic ratios (BRs) commensurate with those for conventional powder guns. In this paper, the ETC ballistic cycle is examined in an attempt to identify possible aspects of the ETC process leading to the lower-than-expected BRs. Results indicate that at least a partial answer may be... View full abstract»

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  • Rapid testing for multishot railgun bore life

    Publication Year: 1997, Page(s):390 - 394
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (804 KB)

    Bore life is one of the most difficult technical issues confronting railgun development for practical use. Material testing for wear and erosion using a railgun is a very slow and expensive method for developing many shot life data. We have built and used a pin-on-disk contact tester to rapidly and economically accumulate materials performance data under railgun armature/rail interface conditions.... View full abstract»

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  • Hypervelocity electric discharge accelerator

    Publication Year: 1997, Page(s):305 - 309
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (464 KB)

    The achievement of accelerating macro-particles to high velocities has fundamental significance of research connected with solid state physics. A set of experimental data, obtained using 16 mm hypervelocity accelerator of macroparticles is presented. Compact polymer cylinders of 2-4 g were used as projectiles. As the result of the experiments the dependencies was obtained which characterize the ac... View full abstract»

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  • Measurement of the muzzle dynamic pressure of the plasma dynamic accelerator

    Publication Year: 1997, Page(s):384 - 389
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (756 KB)

    The plasma dynamic accelerator comprises a coaxial railgun-like first stage that accelerates a plasma to very high velocities. The second stage, the compressor coil, compresses this plasma into a fast and dense plasma flow. A series of experiments was conducted to measure the dynamic pressure in front of the muzzle. Kistler Type 6157 BA pressure probes served as pressure gauges. The evaluation of ... View full abstract»

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  • Pulsed-power and high energy plasma simulations for application to electrothermal-chemical guns

    Publication Year: 1997, Page(s):299 - 304
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (544 KB)

    Under U.S. Army ARDEC contract DAAA21-93-D1003, Princeton Combustion Research Laboratories (PCRL) has recently completed the development of a PC-based, end-to-end electrothermal-chemical (ETC) gun ballistic simulation code called PPIB. PPIB is a time-dependent lumped-paramter, electrothermal-chemical gun ballistic simulator, which has a one-dimensional plasma submodel. The code has been validated ... View full abstract»

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  • Muzzle arc control using an inductive shunt

    Publication Year: 1997, Page(s):594 - 598
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (492 KB)

    Many electromagnetic launcher applications require that no electric arc occurs at the muzzle when the armature exits. Various techniques have been proposed to satisfy this requirement, including a muzzle shorting switch or a resistor connected across the muzzle. This paper examines the prospects for using a fixed inductive short circuit across the muzzle to eliminate muzzle arcing. The design of a... View full abstract»

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  • Finite element modelling of flux concentrators for coilguns

    Publication Year: 1997, Page(s):175 - 177
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (316 KB)

    The use of flux concentrators in coilguns is an attractive proposition since they combine the strength and durability of a single turn coil with the versatility of a multiturn winding. The primary winding can be of large radius when compared to the bore size of the gun, enabling stresses to be reduced. Unfortunately, efficiency is rather poor, and so Finite Element models are used to investigate t... View full abstract»

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  • Pulsed power for electric guns

    Publication Year: 1997, Page(s):453 - 460
    Cited by:  Papers (50)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (860 KB)

    Pulsed power requirements for electric guns are described and preferred technologies for energy storage and pulse compression are discussed. Primary approaches are rotating machines and capacitor based, pulse-forming networks, but alternative technologies that may offer some operational benefits are also discussed. These include linear magnetic flux compressors, cryogenically cooled, high-temperat... View full abstract»

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  • The AMT maglev test sled-EML weapons technology transition to transportation

    Publication Year: 1997, Page(s):379 - 383
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (704 KB)

    Technology spinoffs from prior electromagnetic launcher work enhance a magnetic levitation transportation system test bed being developed by American Maglev Technology of Florida. This project uses a series wound linear DC motor and brushes to simplify the magnetic levitation propulsion system. It takes advantage of previous related work in electromagnetic launcher technology to achieve success wi... View full abstract»

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  • Cannon-caliber electromagnetic launcher

    Publication Year: 1997, Page(s):630 - 635
    Cited by:  Papers (15)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (752 KB)

    The University of Texas at Austin, Center for Electromechanics (UT-CEM) designed and fabricated a rapid-fire railgun launcher. Three, five-round salvos of 185-g launch packages are to be accelerated to 1,850 m/s at a rate of 5 Hz. The 2.25-m-long series-augmented launcher has a 30-mm round-bore equivalent rectangular geometry and is water-glycol cooled. Rapid-fire operation is achieved by driving ... View full abstract»

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  • The IAT electromagnetic launch research facility

    Publication Year: 1997, Page(s):129 - 133
    Cited by:  Papers (37)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (800 KB)

    A new electromagnetic launcher research facility is being constructed at the Institute for Advanced Technology (IAT). IAT is federated with the Army Research Laboratory and The University of Texas at Austin. The mission and support for the IAT comes from the U.S. Army. A major task assigned to the IAT is to support the Army's tactical programs in electric armaments by conducting long-term basic an... View full abstract»

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  • Observations of visible light emission from interactions between an electrothermal plasma and a propellant

    Publication Year: 1997, Page(s):295 - 298
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (380 KB)

    A set of experiments has been conducted on the experimental plasma-propellant interaction facility PIPE to measure the burn rates of JA2 solid propellant as a function of plasma impingement angle with respect to the propellant surface. The propellant test stand is designed such that the angle of plasma impact on the propellant surface can be varied 0 to 90 degrees. Optical emission spectroscopy me... View full abstract»

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  • Summary of HEDRC-IVTAN railgun investigations

    Publication Year: 1997, Page(s):589 - 593
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (520 KB)

    The physical problems that determine the efficiency of plasma armature railguns (PARG) are discussed. It is shown that the problems arising from both the restricted ability of the PARG barrel to transfer electromagnetic (EM) energy from the breech to projectile and viscous drag are dominating. EM hypervelocity PARG operating regime may be practically effected and achieved velocity limit may be ove... View full abstract»

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  • A modular 300-kJ capacitive pulsed power supply system for the Swedish ETC programme

    Publication Year: 1997, Page(s):449 - 452
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (432 KB)

    Under contract of the Swedish FMV Defence Material Administration a research and development programme on electrothermal-chemical launchers was started in 1995. Two containerized 300-kJ capacitive pulsed power supply (PPS) systems providing a large flexibility by their modular setup were designed and fabricated at the German TZN R&D Center. After describing the general technical requirements r... View full abstract»

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  • Study of new materials for railgun launchers

    Publication Year: 1997, Page(s):406 - 409
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (760 KB)

    The description of new materials which can be used in railgun launchers is presented. Mo-W compositions in the Cu matrix, binary composites with anisotropic conductivity, ceramics and ceramic covers have been studied as materials for rails, solid armature and insulator respectively. The tests have been conducted on a 1 m long railgun launcher with a section of the bore 10 mm×10 mm using a cu... View full abstract»

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  • Numerical comparison between a differential and an integral approach in MHD simulations of electromagnetic railgun plasma armatures

    Publication Year: 1997, Page(s):219 - 224
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (676 KB)

    In this paper an integral approach for the analysis and the numerical simulation of the plasma armatures operating in rail launchers is tested by comparison with a differential approach. After a brief recall of the main theoretical and numerical aspects of the two approaches, a benchmark problem is presented and analyzed. The comparison between the results obtained confirms the validity and the ef... View full abstract»

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  • The first generation in the development and testing of full-scale, electric gun-launched, hypervelocity projectiles

    Publication Year: 1997, Page(s):53 - 62
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2296 KB)

    On August 31, 1988, the first full-scale, hypervelocity projectile of tactical mass and flight configuration was launched successfully from the U.S. Green Farm 90-mm electromagnetic railgun. Advances since that “first” in the ability to use electric energy to supply either part of the propulsive force (i.e., part electrical energy and part chemical energy) or all of the propulsive forc... View full abstract»

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  • Electrical performance of a round bore, augmented, quadrupole railgun

    Publication Year: 1997, Page(s):560 - 565
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (648 KB)

    The parallel connected quadrupole railgun has some unique benefits for reducing bore surface erosion when plasma armatures are employed. Unfortunately, these benefits are offset by a relatively small inductance gradient so that large currents are required to develop state-of-the-art driving pressures. To circumvent this problem a set of series connected, augmenting rails have been incorporated in ... View full abstract»

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  • Overview of some recent EML efforts within Russia

    Publication Year: 1997, Page(s):26 - 30
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (612 KB)

    The research program in the USSR and then in Russia included the study of the potentials of different types of electromagnetic launchers of solids: railguns, ET guns, ETC guns. In this survey, primary emphasis is placed on railguns. Pulsed power problems for EM guns will not be discussed in this paper. Traditionally, the potentials of electromagnetic launchers of solids have been studied in two as... View full abstract»

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  • Design and operation of the electrogun, an electrothermal gun for producing metal and carbon plasma jets

    Publication Year: 1997, Page(s):373 - 378
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (480 KB)

    The electrogun is a type of electrothermal gun especially modified to produce metal and carbon plasma jets. These jets are capable of deep penetration into room temperature, atmospheric-pressure gases, so that the plasma composing the jet is vigorously mixed into an excess of cold gas. Reaction products are rapidly quenched and form a room-temperature gas suspension of nanoparticles which graduall... View full abstract»

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  • A lightweight composite shielding material for electromagnetic gun launchers

    Publication Year: 1997, Page(s):625 - 629
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (596 KB)

    There is a need for the development of a lightweight electromagnetic shield that can be easily installed and maintained to provide high-performance shielding for electric gun barrels. In the past few years, there have been advancements in the development of lightweight material, which could be quite useful in the electric gun technology. Material is TI-Shield, manufactured by instruments, Inc. TI-... View full abstract»

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  • Current carrying capacity of solid armatures for railguns at zero speed

    Publication Year: 1997, Page(s):125 - 128
    Cited by:  Papers (16)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (668 KB)

    A very large body of work exists which describes the design, construction, and performance of railgun armatures when they are accelerated in real railguns. Much less is known about how armature-type assemblies behave when forward motion is prevented. We suggest that valuable armature data might be obtained by doing experiments at zero velocity. In this program we have confirmed yet again that divi... View full abstract»

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  • Plasma-fluid interaction and arc resistance in electrothermal launchers

    Publication Year: 1997, Page(s):289 - 294
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (556 KB)

    The comparison of numerical simulations with real electrothermal shots has provided new insight into the plasma-fluid and plasma-wall interaction processes. Strong indications are given for the following effects: in addition to wall ablation by radiation, there is a nearly time-independent ablation rate, which may be attributed to direct heat transfer. In the presence of liquid inside the discharg... View full abstract»

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Aims & Scope

IEEE Transactions on Magnetics publishes research in science and technology related to the basic physics and engineering of magnetism, magnetic materials, applied magnetics, magnetic devices, and magnetic data storage.

Full Aims & Scope

Meet Our Editors

Editor-in-Chief
Pavel Kabos
National Institute of Standards and Technology