Diffusion of fast rising strong magnetic fields into conductors

N. A. Labetskaya, V. I. Oreshkin, S. A. Chaikovsky, I. M. Datsko, N. I. Kuskova, A. D. Rud

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Abstract

The basic processes occurring in a conductor exploding in a current skinning mode are the propagation of a nonlinear magnetic diffusion wave in the conductor and the formation of low-temperature plasma at its surface. An experimental study of the phenomenon of nonlinear magnetic diffusion into conductors in magnetic fields of induction rising at a rate up to 3·109 T/s was carried out on the MIG generator capable of producing a peak current up to 2.5 MA within a rise time of 100 ns. It has been found experimentally that the average velocity of a nonlinear magnetic diffusion wave in an aluminum conductor placed in a strong magnetic field (up to 300 T) rising at a high rate (on average, 3·109 T/s) is (2.7÷3.3)·105 cm/s. This is comparable to the velocity of sound in aluminum under normal conditions and reasonably agrees with predictions of numerical simulations.

Original languageEnglish
Article number012020
JournalJournal of Physics: Conference Series
Volume552
Issue number1
DOIs
Publication statusPublished - 2014

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Labetskaya, N. A., Oreshkin, V. I., Chaikovsky, S. A., Datsko, I. M., Kuskova, N. I., & Rud, A. D. (2014). Diffusion of fast rising strong magnetic fields into conductors. Journal of Physics: Conference Series, 552(1), [012020]. https://doi.org/10.1088/1742-6596/552/1/012020