MHD instabilities developing in a conductor exploding in the skin effect mode

V. I. Oreshkin, S. A. Chaikovsky, I. M. Datsko, N. A. Labetskaya, G. A. Mesyats, E. V. Oreshkin, N. A. Ratakhin, D. V. Rybka

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

The results of experiments with exploding copper conductors, performed on the MIG facility (providing currents of amplitude of about 2.5 MA and rise time of 100 ns), are analyzed. With an frame optical camera, large-scale instabilities of wavelength 0.2-0.5 mm were detected on the conductor surface. The instabilities show up as plasma "tongues" expanding with a sound velocity in the opposite direction to the magnetic field gradient. Analysis performed using a two-dimensional MHD code has shown that the structures observed in the experiments were formed most probably due to flute instabilities. The growth of flute instabilities is predetermined by the development of thermal instabilities near the conductor surface. The thermal instabilities arise behind the front of the nonlinear magnetic diffusion wave propagating through the conductor. The wavefront on its own is not subject to thermal instabilities.

Original languageEnglish
Article number122107
JournalPhysics of Plasmas
Volume23
Issue number12
DOIs
Publication statusPublished - 1 Dec 2016

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exploding wires
thermal instability
conductors
diffusion waves
magnetic diffusion
tongue
acoustic velocity
cameras
copper
gradients
magnetic fields
wavelengths

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Oreshkin, V. I., Chaikovsky, S. A., Datsko, I. M., Labetskaya, N. A., Mesyats, G. A., Oreshkin, E. V., ... Rybka, D. V. (2016). MHD instabilities developing in a conductor exploding in the skin effect mode. Physics of Plasmas, 23(12), [122107]. https://doi.org/10.1063/1.4971443

MHD instabilities developing in a conductor exploding in the skin effect mode. / Oreshkin, V. I.; Chaikovsky, S. A.; Datsko, I. M.; Labetskaya, N. A.; Mesyats, G. A.; Oreshkin, E. V.; Ratakhin, N. A.; Rybka, D. V.

In: Physics of Plasmas, Vol. 23, No. 12, 122107, 01.12.2016.

Research output: Contribution to journalArticle

Oreshkin, VI, Chaikovsky, SA, Datsko, IM, Labetskaya, NA, Mesyats, GA, Oreshkin, EV, Ratakhin, NA & Rybka, DV 2016, 'MHD instabilities developing in a conductor exploding in the skin effect mode', Physics of Plasmas, vol. 23, no. 12, 122107. https://doi.org/10.1063/1.4971443
Oreshkin VI, Chaikovsky SA, Datsko IM, Labetskaya NA, Mesyats GA, Oreshkin EV et al. MHD instabilities developing in a conductor exploding in the skin effect mode. Physics of Plasmas. 2016 Dec 1;23(12). 122107. https://doi.org/10.1063/1.4971443
Oreshkin, V. I. ; Chaikovsky, S. A. ; Datsko, I. M. ; Labetskaya, N. A. ; Mesyats, G. A. ; Oreshkin, E. V. ; Ratakhin, N. A. ; Rybka, D. V. / MHD instabilities developing in a conductor exploding in the skin effect mode. In: Physics of Plasmas. 2016 ; Vol. 23, No. 12.
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