X-ray radiography of the overheating instability in underwater electrical explosions of wires
- Imperial College, London (United Kingdom)
- Technion-Israel Inst. of Technology, Haifa (Israel)
- European Synchrotron Radiation Facility (ESRF), Grenoble (France)
- Russian Academy of Sciences (RAS), Moscow (Russia). Lebedev Physical Inst.
We introduce the measurements of the development of striation like instabilities during the electrical driven explosions of wires in a water bath. In vacuum based wire explosion experiments, such instabilities have long been known. Yet, in spite of intense research into the explosion of wires in liquids, the development of these instabilities has either not been observed or has been assumed to play a minor role in the parameters of the exploding wire due to the tamping of the wire's explosion. Using synchrotron based multiframe radiography, we have seen the development of platelike density structures along an exploding copper wire. Our measurements were compared to a 2D magnetohydrodynamics simulation, showing similar striation formation. These observed instabilities could affect the measurements of the conductivity of the wire material in the gas-plasma state—an important parameter in the warm dense matter community. The striations could 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 adjacent wire—as it would do in experiments with arrays of wires.
- Research Organization:
- Cornell Univ., Ithaca, NY (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA); Engineering and Physical Sciences Research Council (EPSRC); European Synchrotron Radiation Facility (ESRF)
- Grant/Contract Number:
- NA0003764; SC0018088
- OSTI ID:
- 1614420
- Alternate ID(s):
- OSTI ID: 1511527; OSTI ID: 1512428
- Journal Information:
- Physics of Plasmas, Vol. 26, Issue 5; ISSN 1070-664X
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
The effect of the metal phase state on the growth of thermal instabilities in an electrically exploding conductor
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journal | August 2019 |
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