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Title: The Thermal Instabilities on Electrical Explosion of Metal Wires

Abstract

An electrical explosion of thin metal wires at a current rise time of several tens of nanoseconds and at a current density of {approx}108 A/cm{sup 2} was studied. A two-dimensional magnetohydrodynamic code based on the particle-in-cell method is used to calculate the formation of striations and a low-density plasma corona surrounding the wire.

Authors:
; ; ; ; ;  [1]; ;  [2];  [3];  [4]
  1. High Current Electronics Institute SB RAS, Tomsk (Russian Federation)
  2. Institute for High Energy Densities RAS, Moscow (Russian Federation)
  3. RFNC- Zababakhin Institute of Technical Physics, Snejinsk (Russian Federation)
  4. Tel Aviv University, Tel Aviv (Israel)
Publication Date:
OSTI Identifier:
20729225
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 808; Journal Issue: 1; Conference: 6. international conference on dense Z-pinches, Oxford (United Kingdom), 25-28 Jul 2005; Other Information: DOI: 10.1063/1.2159330; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; CURRENT DENSITY; ELECTRIC CURRENTS; EXPLODING WIRES; INSTABILITY; MAGNETOHYDRODYNAMICS; METALS; PLASMA; PLASMA DENSITY; PLASMA SIMULATION; PULSE RISE TIME; STRIATIONS

Citation Formats

Oreshkin, V.I., Baksht, R.B., Ratakhin, N.A., Labetsky, A.Yu., Rousskikh, A.G., Shishlov, A.V., Levashov, P.R., Khishchenko, K.V., Glazyrin, I.V., and Beilis, I.. The Thermal Instabilities on Electrical Explosion of Metal Wires. United States: N. p., 2006. Web. doi:10.1063/1.2159330.
Oreshkin, V.I., Baksht, R.B., Ratakhin, N.A., Labetsky, A.Yu., Rousskikh, A.G., Shishlov, A.V., Levashov, P.R., Khishchenko, K.V., Glazyrin, I.V., & Beilis, I.. The Thermal Instabilities on Electrical Explosion of Metal Wires. United States. doi:10.1063/1.2159330.
Oreshkin, V.I., Baksht, R.B., Ratakhin, N.A., Labetsky, A.Yu., Rousskikh, A.G., Shishlov, A.V., Levashov, P.R., Khishchenko, K.V., Glazyrin, I.V., and Beilis, I.. Thu . "The Thermal Instabilities on Electrical Explosion of Metal Wires". United States. doi:10.1063/1.2159330.
@article{osti_20729225,
title = {The Thermal Instabilities on Electrical Explosion of Metal Wires},
author = {Oreshkin, V.I. and Baksht, R.B. and Ratakhin, N.A. and Labetsky, A.Yu. and Rousskikh, A.G. and Shishlov, A.V. and Levashov, P.R. and Khishchenko, K.V. and Glazyrin, I.V. and Beilis, I.},
abstractNote = {An electrical explosion of thin metal wires at a current rise time of several tens of nanoseconds and at a current density of {approx}108 A/cm{sup 2} was studied. A two-dimensional magnetohydrodynamic code based on the particle-in-cell method is used to calculate the formation of striations and a low-density plasma corona surrounding the wire.},
doi = {10.1063/1.2159330},
journal = {AIP Conference Proceedings},
number = 1,
volume = 808,
place = {United States},
year = {Thu Jan 05 00:00:00 EST 2006},
month = {Thu Jan 05 00:00:00 EST 2006}
}
  • An electrical explosion of thin metal wires at a current rise time of several tens of nanoseconds and at a current density of {approx}108 A/cm2 was studied. A two-dimensional magnetohydrodynamic code based on the particle-in-cell method is used to calculate the formation of striations and a low-density plasma corona surrounding the wire.
  • The electrical and space-time characteristics during electrical explosion of wires is studied. (AIP)
  • The plasma produced during the high-power electrical explosion of thin copper wires has been studied numerically and experimentally. The experiments were carried out with the SNOP-1 high-current pulse generator with a pulse length approx.100 ns and a peak current approx.200 kA. Two types of explosions were studied: explosions in water and in vacuum. Comparison of the experimental data with the results of one-dimensional MHD calculations supports the approach taken here to describe the plasma properties in states with temperatures up to 50 eV and a mass density approx.0.01 g/cm/sup 3/.
  • The plasma produced during the high-power electrical explosion of thin copper wires has been studied numerically and experimentally. The experiments were carried out with the SNOP-1 high-current pulse generator with a pulse length approx.100 ns and a peak current approx.200 kA. Two types of explosions were studied: explosions in water and in vacuum. Comparison of the experimental data with the results of one-dimensional MHD calculations supports the approach taken here to describe the plasma properties in states with temperatures up to 50 eV and a mass density approx.0.01 g/cm/sup 3/.
  • Experimental and computational investigations of nanosecond electrical explosion of a thin Al wire in vacuum are presented. We have demonstrated that increasing the current rate leads to increased energy deposited before voltage collapse. The experimental evidence for synchronization of the wire expansion and light emission with voltage collapse is presented. Hydrocarbons are indicated in optical spectra and their influence on breakdown physics is discussed. The radial velocity of low-density plasma reaches a value of {approx}100 km/s. The possibility of an overcritical phase transition due to high pressure is discussed. A one-dimensional magnetohydrodynamic (MHD) simulation shows good agreement with experimental data.more » The MHD simulation demonstrates separation of the exploding wire into a high-density cold core and a low-density hot corona as well as fast rejection of the current from the wire core to the corona during voltage collapse. Important features of the dynamics for the wire core and corona follow from the MHD simulation and are discussed.« less