Accelerating conductors by electromagnetic action through metallic shields

Novac, B.M.; Smith, I.R.; Jarvis, P.E.; Abbott, C.J.

doi:10.1109/tmag.2002.805922

Cited by 4 publications

(4 citation statements)

References 4 publications

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“…A number of original features have recently been introduced into the standard approach (also termed network mesh or meshmatrix method), mostly related to the fast dynamics of imploding/exploding metallic structures. The technique has been successfully applied by Loughborough along the years in a very wide range of pulsed power applications, including pulsed ultrahigh magnetic field coils [12], explosively driven fluxcompression generators [13], [14], single and multiturn electromagnetic launchers [15]- [17], electromagnetic launchers [15]- [17], electromagnetic compression [18], and the design of various types of high-voltage air core pulsed transformers [19].…”

Section: A Generalitiesmentioning

confidence: 99%

Numerical Modelling of a Flyer Plate Electromagnetic Accelerator

Novac

Omar²,

Graneau³

et al. 2012

IEEE Trans. Plasma Sci.

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A joint program involving the study and practical performance of a foil-flyer electromagnetic accelerator has recently been initiated by Atomic Weapons Establishment, Aldermaston, and Loughborough University. As an initial phase of the work, both 0-D and 2-D numerical models for the foil-flyer accelerator have been developed. The 0-D model, although very crude, is capable of providing an insight into the accelerator phenomena and is currently used for parametric design studies. The 2-D model is based on the well-proven Loughborough filamentary modeling technique and is capable of accurately calculating the 2-D distribution of current, velocity, acceleration, and temperature of the flyer, together with the complete distribution of the magnetic and electric fields generated during a shot. The paper presents the two models and compares typical theoretical predictions with the corresponding experimental results.

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Section: A Generalitiesmentioning

confidence: 99%

Numerical Modelling of a Flyer Plate Electromagnetic Accelerator

Novac

Omar²,

Graneau³

et al. 2012

IEEE Trans. Plasma Sci.

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“…13 shows the current distribution at various times in the driving coil, the shield and in the projectile calculated using filamentary modeling. This enabled the development and demonstration of a practical arrangement for a unique fastener [5]. A similar filamentary technique was used in the test of a high-velocity accelerator having a record overall energy efficiency of more than 50% [6].…”

Section: B Tesla Transformersmentioning

confidence: 99%

“…Current distribution (a) at the beginning of the acceleration process and (b) at the end of the acceleration process[5].…”

mentioning

confidence: 99%

Filamentary modeling of pulsed high-current systems

Novac

2012

2012 14th International Conference on Megagauss Magnetic Field Generation and Related Topics (MEGAGAUSS)

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Filamentary modeling, also termed the network mesh or mesh-matrix method, has a long history and the first to use this method of analyzing electric circuits was J.C. Maxwell. In pulsed power technology, the most intensive users of this numerical modeling were those designing electromagnetic launchers and homopolar generators. The filamentary technique has been successfully applied at Loughborough along the years in a wide range of pulsed power, high-current applications, including pulsed magnetic field coils, explosively driven magnetic flux-compression generators, various electromagnetic launchers, ultrahigh magnetic field generation by single-turn coils and electromagnetic implosions and the design of various types of high-voltage air-core pulsed transformers. After an introduction into the filamentary technique, most of these applications will be detailed.

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“…Loughborough has recently introduced a number of novel features into the modelling, mostly related to the fast dynamics of imploding/exploding structures, and has successfully applied the technique in a very wide range of pulsed-power applications, including explosively driven FCGs [13], multi-and single-turn inductive launchers [14,15], and electromagnetic flux-compression [16]. The technique has also been used to provide an improved understanding of a novel electromagnetic technique developed for remote activation across thick metallic shields [17].…”

Section: Hvt Type Advantages Disadvantagesmentioning

confidence: 99%

Fast and accurate two-dimensional modelling of high-current, high-voltage air-cored transformers

Luo¹,

Novac²,

Smith³

et al. 2005

J. Phys. D: Appl. Phys.

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This paper presents a detailed two-dimensional model for high-voltage air-cored pulse transformers of two quite different designs. A filamentary technique takes magnetic diffusion fully into account and enables the resistances and self and mutual inductances that are effective under fast transient conditions to be calculated. Very good agreement between calculated and measured results for typical transformers has been obtained in several cases, and the model is now regularly used in the design of compact high-power sources.

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Accelerating conductors by electromagnetic action through metallic shields

Cited by 4 publications

References 4 publications

Numerical Modelling of a Flyer Plate Electromagnetic Accelerator

Numerical Modelling of a Flyer Plate Electromagnetic Accelerator

Filamentary modeling of pulsed high-current systems

Fast and accurate two-dimensional modelling of high-current, high-voltage air-cored transformers

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