X-ray radiography of the overheating instability in underwater electrical explosions of wires

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Title: X-ray radiography of the overheating instability in underwater electrical explosions of wires
Authors: Yanuka, D
Rososhek, A
Theocharous, S
Bland, SN
Krasik, YE
Olbinado, MP
Rack, A
Oreshkin, EV
Item Type: Journal Article
Abstract: We present the measurements of the development of striation like instabilities during the electrical driven explosions of wires in a waterbath. In vacuum based wire explosion experiments, such instabilities have long been known. However, in spite of intense research into theexplosion of wires in liquids, the development of these instabilities has either not been observed or has been assumed to play a minor role inthe parameters of the exploding wire due to the tamping of the wire’s explosion. Using synchrotron based multiframe radiography, we haveseen the development of platelike density structures along an exploding copper wire. Our measurements were compared to a 2Dmagnetohydrodynamics simulation, showing similar striation formation. These observed instabilities could affect the measurements of theconductivity of the wire material in the gas-plasma state—an important parameter in the warm dense matter community. The striationscould also act as a seed for other instabilities later in time if the wire is in a dense flow of material or experiences a shock from an adjacentwire—as it would do in experiments with arrays of wires.
Issue Date: 1-May-2019
Date of Acceptance: 28-Apr-2019
URI: http://hdl.handle.net/10044/1/73950
DOI: https://dx.doi.org/10.1063/1.5089813
ISSN: 1070-664X
Publisher: AIP Publishing
Journal / Book Title: Physics of Plasmas
Volume: 26
Issue: 5
Copyright Statement: Published under license by AIP Publishing. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Physics of Plasmas and may be found at https://aip.scitation.org/doi/10.1063/1.5089813
Keywords: Science & Technology
Physical Sciences
Physics, Fluids & Plasmas
Physics
EXPLODING WIRE
CONDUCTIVITY
WATER
Science & Technology
Physical Sciences
Physics, Fluids & Plasmas
Physics
EXPLODING WIRE
CONDUCTIVITY
WATER
0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics
0201 Astronomical and Space Sciences
0203 Classical Physics
Fluids & Plasmas
Publication Status: Published
Article Number: ARTN 050703
Online Publication Date: 2019-05-08
Appears in Collections:Physics
Plasma Physics



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