Correlated Electrical and Optical Measurements of Exploding Wires

Bennett, F. D.; Burden, H. S.; Shear, D. D.

doi:10.1063/1.1706472

Cited by 56 publications

(6 citation statements)

References 13 publications

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“…A similar conclusion was made by the authors of the review [3]. At the same time, Bennett et al [100] arrived at the conclusion that the core is shunted "due to a discharge in released gases initially adsorbed by the wire." The same point of view was expressed by Sinars et al [151] who stated that "a very likely mechanism of corona formation is shunting of the wire by a highly conductive plasma channel, which occurs during the breakdown of gases desorbed by the metal."…”

Section: Mechanism Of Corona Formation During a We In Vacuummentioning

confidence: 52%

Wire Explosion in Vacuum

Oreshkin

Baksht

2020

IEEE Trans. Plasma Sci.

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This article presents a review of experimental and theoretical studies devoted to the processes that occur during explosions of wires in vacuum when the current densities in the wire are of the order of 10 8 A/cm 2 and the current density rise rates are no less than 10 15 A/(cm 2 • s). The theoretical background is focused on the transformation of the wire metal into ionized plasma. In particular, the basic physical notions used to describe wire explosions (WEs; state diagram, current action integral, and metal conductivity changes in phase transitions) are given; magnetohydrodynamic equations are described which are used to simulate WEs, and the simulation predictions are discussed together with their reliability. Extensive experimental data on WEs in vacuum are presented which made it possible to describe the corona and core formation and the development of electrothermal instabilities in the core. The data on the energy deposited in a wire exploding in vacuum reported by different authors are compared. In conclusion, problems are discussed that require additional experimental investigations, namely, the role of metastable states in a WE and the mechanism by which the core is shunted.

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Section: Mechanism Of Corona Formation During a We In Vacuummentioning

confidence: 52%

Wire Explosion in Vacuum

Oreshkin

Baksht

2020

IEEE Trans. Plasma Sci.

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“…Smith's8 solutions are based upon a small perturbation approximation and, for the "fast" explosions discussed here, Bennett et al 9 have shown that the radial motion is small while the wire is in its solid state. Because of the complex nature of wire explosions and because the analysis presented in this paper deals only with the solid state, it is not anticipated that this will lead to a complete description of striative phenomena, but it may provide some insight into one of the mechanisms.…”

Section: Introductionmentioning

confidence: 94%

Origin of Striations Due to Mechanical Effects in Fast Wire Explosions

Smith

1970

Journal of Applied Physics

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The suggestion that mechanical oscillations in the solid wire are in part responsible for the production of striations observed in a class of wire explosions is investigated using the dispersion relation for elastic waves in isotropic solid cylinders. It is proposed that these oscillations arise due to the transient nature of the electrical energy deposition and that axial waves originate at points of discontinuities such as impurities and grain boundaries. Numerical solutions are obtained using the first shear-and dilatationalmode cutoff frequencies, and the wave numbers of these and standing waves are presented as a function of Poisson's ratio. Experimental data on the average distance between striations and new data are found to lie within the range predicted by the theoretical analysis.

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“…Measuring and analyzing the voltage and current waveforms during the exploding wire process is always the essential step to the exploding wire research. The voltage and current waveforms were used to calculate the time-dependent resistance, instantaneous power, and energy absorbed by the wire [2]. The current waveform was use to indicate phase change of the wire [3].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of energy deposition rate of exploded wire under different initial capacitor voltage for thin film production

Yang

Liu

Fan³

2010

24th ISDEIV 2010

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Thin film production by exploding wires is affected by many factors; one of such factors is the energy deposition rate. The research in this study focused on measuring the voltage and current of an exploding copper wire that was 15 cm long and 0.3 mm in diameter. The time-dependent wire resistance and the energy deposited into the wire were deduced from the measured voltage and current, and the maximum wire resistance was observed at the time when part of the wire mass was heated up to the boiling point, which were called critical time and critical point respectively. From the experiment, the following statements could be surmised: the maximum wire resistance increases from about 224.4 mΩ to 266.1 mΩ and the critical time reduces from about 8.8 μs to 7.2 μs when the initial capacitor voltage changes from 10 kV to 20 kV, as well as the fact that the mean energy depositing rate varies from about 13.3 J/μs to 27.6 J/μs before the critical point. This result demonstrates that a faster energy depositing rate can help to heat up the wire mass more uniformly and more wire mass would evaporate before the critical time to create a greater wire resistance at the critical point.

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Correlated Electrical and Optical Measurements of Exploding Wires

Cited by 56 publications

References 13 publications

Wire Explosion in Vacuum

Wire Explosion in Vacuum

Origin of Striations Due to Mechanical Effects in Fast Wire Explosions

Evaluation of energy deposition rate of exploded wire under different initial capacitor voltage for thin film production

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