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The electrical explosion of metal wire plays significant role in many applications, such as synthesis of nanopowder, dense plasma generation and wire-array Z pinch1, etc. In the initial stage of the wire-array Z pinch, every single wire are exploded into core-corona structure, i.e., the high-density, low-temperature core surrounded by the high-temperature, low-density corona plasma. The plasma column...
The physics of electrical explosion of metal wire is extensively investigated since it is of interest for many fundamental applications, such as dense plasma generation, wire-array Z pinch1, etc. Better understanding of the physics of the electrical explosion of metal wire leads to efficient utilization of this technique. With the in-depth experimental investigation of the electrical explosion of...
The impressive experimental result at Sandia National Laboratory has proven the wire-array Z pinch an effective way to form extremely high density X-ray sources. The X-ray yield is greatly influenced by the uniformity of the exploding product of each wire in the initial stage, which gives a strong impetus to the research on single-wire explosion. When the current flows through a thin metal wire in...
The fast electrical explosion of a metal wire is a common method to study the behavior of wires during the prepulse in wire array Z-pinch. The experimental results of the electrical explosion of aluminum (Al) wires using negative nanosecond-pulsed current with magnitude of 1∼2 kA are presented in this paper. The Al wires with different diameter are exploded with current rate of 90–170 A/ns. A laser...
Compared to the exploding wires in the vacuum, the air would suppress the expansion of the vaporized metal or impurities and then delay the procedure of voltage collapse. Electrical exploding wires in air are often characterized by a current pause stage before the voltage collapse. In this paper, we will report two different electrical breakdown modes of electrical exploding aluminum wires in air.
The fast electrical explosion of a single metal wire has important applications in many fields, e.g., wire-array Z-pinch, x-rays source, and material property in extreme conditions, etc. The experimental and numerical investigations on nanosecond electrical explosion of single thin aluminum wire are presented in this paper. The experiments are conducted under a negative-polarity current with current...
The electrical explosion of single wire is widely used to understand the physics of the early stage of wire-array Z pinch. When the current pulse passes through the thin metallic wire, the wire heats, melts, vaporizes and ionizes. The metallic wire is exploded to two-object structure, the dense cold core surrounded by a conductive corona. Initially, the voltage across and the current through the wire...
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