skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Effects of load voltage on voltage breakdown modes of electrical exploding aluminum wires in air

Abstract

The effects of the load voltage on the breakdown modes are investigated in exploding aluminum wires driven by a 1 kA, 0.1 kA/ns pulsed current in air. From laser probing images taken by laser shadowgraphy, schlieren imaging, and interferometry, the position of the shockwave front, the plasma channel, and the wire core edge of the exploding product can be determined. The breakdown mode makes a transition from the internal mode, which involves breakdown inside the wire core, to the shunting mode, which involves breakdown in the compressed air, with decreasing charging voltage. The breakdown electrical field for a gaseous aluminum wire core of nearly solid density is estimated to be more than 20 kV/cm, while the value for gaseous aluminum of approximately 0.2% solid density decreases to 15–20 kV/cm. The breakdown field in shunting mode is less than 20 kV/cm and is strongly affected by the vaporized aluminum, the desorbed gas, and the electrons emitted from the wire core during the current pause. Ohmic heating during voltage collapses will induce further energy deposition in the current channel and thus will result in different expansion speeds for both the wire core and the shockwave front in the different modes.

Authors:
; ; ; ; ; ; ;  [1]
  1. State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an 710049 (China)
Publication Date:
OSTI Identifier:
22490938
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 22; Journal Issue: 6; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ALUMINIUM; BREAKDOWN; COMPRESSED AIR; DENSITY; ELECTRIC FIELDS; ELECTRIC POTENTIAL; ELECTRON EMISSION; ELECTRONS; ENERGY ABSORPTION; IMAGES; INTERFEROMETRY; JOULE HEATING; LASERS; PLASMA; PULSES; SHOCK WAVES; WIRES

Citation Formats

Wu, Jian, Li, Xingwen, E-mail: xwli@mail.xjtu.edu.cn, Yang, Zefeng, Wang, Kun, Chao, Youchuang, Shi, Zongqian, Jia, Shenli, and Qiu, Aici. Effects of load voltage on voltage breakdown modes of electrical exploding aluminum wires in air. United States: N. p., 2015. Web. doi:10.1063/1.4923308.
Wu, Jian, Li, Xingwen, E-mail: xwli@mail.xjtu.edu.cn, Yang, Zefeng, Wang, Kun, Chao, Youchuang, Shi, Zongqian, Jia, Shenli, & Qiu, Aici. Effects of load voltage on voltage breakdown modes of electrical exploding aluminum wires in air. United States. doi:10.1063/1.4923308.
Wu, Jian, Li, Xingwen, E-mail: xwli@mail.xjtu.edu.cn, Yang, Zefeng, Wang, Kun, Chao, Youchuang, Shi, Zongqian, Jia, Shenli, and Qiu, Aici. Mon . "Effects of load voltage on voltage breakdown modes of electrical exploding aluminum wires in air". United States. doi:10.1063/1.4923308.
@article{osti_22490938,
title = {Effects of load voltage on voltage breakdown modes of electrical exploding aluminum wires in air},
author = {Wu, Jian and Li, Xingwen, E-mail: xwli@mail.xjtu.edu.cn and Yang, Zefeng and Wang, Kun and Chao, Youchuang and Shi, Zongqian and Jia, Shenli and Qiu, Aici},
abstractNote = {The effects of the load voltage on the breakdown modes are investigated in exploding aluminum wires driven by a 1 kA, 0.1 kA/ns pulsed current in air. From laser probing images taken by laser shadowgraphy, schlieren imaging, and interferometry, the position of the shockwave front, the plasma channel, and the wire core edge of the exploding product can be determined. The breakdown mode makes a transition from the internal mode, which involves breakdown inside the wire core, to the shunting mode, which involves breakdown in the compressed air, with decreasing charging voltage. The breakdown electrical field for a gaseous aluminum wire core of nearly solid density is estimated to be more than 20 kV/cm, while the value for gaseous aluminum of approximately 0.2% solid density decreases to 15–20 kV/cm. The breakdown field in shunting mode is less than 20 kV/cm and is strongly affected by the vaporized aluminum, the desorbed gas, and the electrons emitted from the wire core during the current pause. Ohmic heating during voltage collapses will induce further energy deposition in the current channel and thus will result in different expansion speeds for both the wire core and the shockwave front in the different modes.},
doi = {10.1063/1.4923308},
journal = {Physics of Plasmas},
number = 6,
volume = 22,
place = {United States},
year = {Mon Jun 15 00:00:00 EDT 2015},
month = {Mon Jun 15 00:00:00 EDT 2015}
}