Compact explosive-driven generator of primary power based on a longitudinal shock wave demagnetization of hard ferri- and ferromagnets

Sergey I. Shkuratov, Evgueni F. Talantsev, James C. Dickens, Magne Kristiansen

Research output: Contribution to journalArticlepeer-review

29 Scopus citations

Abstract

A new type of compact explosive-driven generator of primary power, which utilizes phenomena of a shock wave demagnetization of hard ferri- and ferromagnets, was developed. The shock wave initiated by high explosive, as well as accelerated flyer plate, passes along the hard ferri- or ferromagnetic body, which serves as initial energy carrier. The shock wave demagnetizes the energy-carrying element, reducing the initial magnetic flux Φ0. In accordance with Faraday's law, this change of magnetic flux Δ Φ0 generates an electromotive force in a coil wound on the energy carrier. Several types of compact generators with energy-carrying element of 10 cm3 in volume were explored. High-voltage generators that utilize energy of BaFe12O19 hard ferrimagnets are capable of producing pulses of amplitude 5.5 kV with full width at half maximum (FWHM) of 1 μs. The generators that utilize energy of Nd2Fe14B high-energy hard ferromagnets are capable of producing pulses with amplitude more than 10 kV and FWHM about 5 μs. The high-current generators based on Nd2Fe14B produced pulses yielded 826 A and FWHM of 180 μs. The developed generator can be used as the most reliable and effective source of primary power capable of seeding magnetocumulative generators.

Original languageEnglish
Pages (from-to)1681-1691
Number of pages11
JournalIEEE Transactions on Plasma Science
Volume30
Issue number5 I
DOIs
StatePublished - Oct 2002

Keywords

  • Hard-ferromagnetic materials
  • Pulsed-power generation
  • Shock waves

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