Abstract
Results are presented from experiments on the explosion of 30.5-μm tungsten wires at a current density of up to 140 MA/cm2 and resistive-heating time of 40-100 ns. The experiments were performed both with and without preheating of wires and at different polarities of the high-voltage electrode. The effect of plasma production at the electrodes on the initiation of breakdown along the exploding wire was investigated by using a frame camera. It is shown that, when the polarity of the high-voltage electrode is positive, breakdown begins with the formation of a bright spot on the wire surface near the cathode, whereas at the negative polarity, breakdown begins with the formation of bright spots on the cathode surface. A comparative analysis of the main characteristics of wire explosions is performed. It is shown that preheating of the conductor increases the resistive-heating time and, accordingly, the energy deposited in the wire core. This effect takes place during explosions of both single wires and wire arrays. The evolution of the state of a metal during the explosion (including melting and evaporation) is studied by one-dimensional simulations by using a semiempirical equation of state describing the properties of tungsten over a wide range of parameters.
| Original language | English |
|---|---|
| Pages (from-to) | 823-835 |
| Number of pages | 13 |
| Journal | Plasma Physics Reports |
| Volume | 32 |
| Issue number | 10 |
| DOIs | |
| Publication status | Published - 1 Oct 2006 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Condensed Matter Physics
- Physics and Astronomy (miscellaneous)
Cite this
Effect of the high-voltage electrode polarity and wire preheating on the energy characteristics of electric explosion of fine tungsten wires in vacuum. / Russkikh, A. G.; Baksht, R. B.; Labetskiǐ, A. Yu; Levashov, P. R.; Tkachenko, S. I.; Khishchenko, K. V.; Shishlov, A. V.; Fedyunin, A. V.; Chaǐkovskiǐ, S. A.
In: Plasma Physics Reports, Vol. 32, No. 10, 01.10.2006, p. 823-835.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Effect of the high-voltage electrode polarity and wire preheating on the energy characteristics of electric explosion of fine tungsten wires in vacuum
AU - Russkikh, A. G.
AU - Baksht, R. B.
AU - Labetskiǐ, A. Yu
AU - Levashov, P. R.
AU - Tkachenko, S. I.
AU - Khishchenko, K. V.
AU - Shishlov, A. V.
AU - Fedyunin, A. V.
AU - Chaǐkovskiǐ, S. A.
PY - 2006/10/1
Y1 - 2006/10/1
N2 - Results are presented from experiments on the explosion of 30.5-μm tungsten wires at a current density of up to 140 MA/cm2 and resistive-heating time of 40-100 ns. The experiments were performed both with and without preheating of wires and at different polarities of the high-voltage electrode. The effect of plasma production at the electrodes on the initiation of breakdown along the exploding wire was investigated by using a frame camera. It is shown that, when the polarity of the high-voltage electrode is positive, breakdown begins with the formation of a bright spot on the wire surface near the cathode, whereas at the negative polarity, breakdown begins with the formation of bright spots on the cathode surface. A comparative analysis of the main characteristics of wire explosions is performed. It is shown that preheating of the conductor increases the resistive-heating time and, accordingly, the energy deposited in the wire core. This effect takes place during explosions of both single wires and wire arrays. The evolution of the state of a metal during the explosion (including melting and evaporation) is studied by one-dimensional simulations by using a semiempirical equation of state describing the properties of tungsten over a wide range of parameters.
AB - Results are presented from experiments on the explosion of 30.5-μm tungsten wires at a current density of up to 140 MA/cm2 and resistive-heating time of 40-100 ns. The experiments were performed both with and without preheating of wires and at different polarities of the high-voltage electrode. The effect of plasma production at the electrodes on the initiation of breakdown along the exploding wire was investigated by using a frame camera. It is shown that, when the polarity of the high-voltage electrode is positive, breakdown begins with the formation of a bright spot on the wire surface near the cathode, whereas at the negative polarity, breakdown begins with the formation of bright spots on the cathode surface. A comparative analysis of the main characteristics of wire explosions is performed. It is shown that preheating of the conductor increases the resistive-heating time and, accordingly, the energy deposited in the wire core. This effect takes place during explosions of both single wires and wire arrays. The evolution of the state of a metal during the explosion (including melting and evaporation) is studied by one-dimensional simulations by using a semiempirical equation of state describing the properties of tungsten over a wide range of parameters.
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U2 - 10.1134/S1063780X06100035
DO - 10.1134/S1063780X06100035
M3 - Article
VL - 32
SP - 823
EP - 835
JO - Plasma Physics Reports
JF - Plasma Physics Reports
SN - 1063-780X
IS - 10
ER -