State of the metal core in nanosecond exploding wires and related phenomena
- 1 August 2004
- journal article
- research article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 96 (3), 1674-1686
- https://doi.org/10.1063/1.1767976
Abstract
Experiments show that an expanding metal wire core that results from a nanosecond electrical explosion in vacuum consists primarily of three different states: solid, microdrop, and gas-plasma. The state of the wire core depends both on the amount of energy deposited before the voltage breakdown and on the heating conditions. For small amounts of deposited energy (on the order of solid-stage enthalpy), the wire core remains in a solid state or is partially disintegrated. For a high level of deposited energy (more than vaporization energy) the wire core is in a gas-plasma state. For an intermediate level of deposited energy (more than melting but less than vaporization), the wire disintegrates into hot liquid microdrops or clusters of submicron size. For a wire core in the cluster state, interferometry demonstrates weak (or even absent) phaseshift. Light emission shows a "firework effect"—the long late-time radiation related to the emission by the expanding cylinder of hot microparticles. For the wire core in a gas-plasma state, interferometry demonstrates a large phaseshift and a fast reduction in light emission due to adiabatic cooling of the expanding wire core. The simulation of this firework effect agrees well with experimental data, assuming submicron size and a temperature approaching boiling for the expanded microparticles cylinder.Keywords
This publication has 18 references indexed in Scilit:
- Experimental and numerical studies of plasma production in the initial stage of implosion of a cylindrical wire arrayPlasma Physics Reports, 2003
- Superheating of solid metal prior to electric explosion of wires at fast energy depositionJournal of Physics A: General Physics, 2003
- Imaging of exploding wire phenomenaIEEE Transactions on Plasma Science, 2002
- Snowplow-like behavior in the implosion phase of wire array Z pinchesPhysics of Plasmas, 2002
- An effective high-power KrCl excimer barrier-discharge lampTechnical Physics Letters, 2002
- Homogeneous electrical explosion of tungsten wire in vacuumJETP Letters, 2001
- Melting of clusters with pair interaction of atomsPhysics-Uspekhi, 1994
- Melting of clusters with pair interaction of atomsUspekhi Fizicheskih Nauk, 1994
- Metals during rapid heating by dense currentsSoviet Physics Uspekhi, 1984
- Metals during rapid heating by dense currentsUspekhi Fizicheskih Nauk, 1984