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

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 ΔΦ₀ 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 4 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.