Multi frame synchrotron radiography of pulsed power driven underwater single wire explosions

Yanuka, D.; Rososhek, A.; Theocharous, S.; Bland, S. N.; Krasik, Ya. E.; Olbinado, M. P.; Rack, A.

doi:10.1063/1.5047204

Multi frame synchrotron radiography of pulsed power driven underwater single wire explosions

Journal Article · Wed Oct 17 00:00:00 EDT 2018 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.5047204· OSTI ID:1614419

Yanuka, D. ^[1]; ^[2]; Theocharous, S. ^[3]; ^[3]; ^[2]; Olbinado, M. P. ^[4]; ^[4]

Imperial College, London (United Kingdom); DOE/OSTI
Technion - Israel Inst. of Technology, Haifa (Israel)
Imperial College, London (United Kingdom)
European Synchrotron Radiation Facility (ESRF), Grenoble (France)

We present herein the first use of synchrotron-based phase contrast radiography to study pulsed-power driven high energy density physics experiments. Underwater electrical wire explosions have become of interest to the wider physics community due to their ability to study material properties at extreme conditions and efficiently couple stored electrical energy into intense shock waves in water. The latter can be shaped to provide convergent implosions, resulting in very high pressures (1-10 Mbar) produced on relatively small pulsed power facilities (100s of kA-MA). Multiple experiments have explored single-wire explosions in water, hoping to understand the underlying physics and better optimize this energy transfer process; however, diagnostics can be limited. Optical imaging diagnostics are usually obscured by the shock wave itself; and until now, diode-based X-ray radiography has been of relatively low resolution and rather a broad x-ray energy spectrum. Utilising phase contrast imaging capabilities of the ID19 beamline at the European Synchrotron Radiation Facility, we were able to image both the exploding wire and the shock wave. Probing radiation of 20-50 keV radiographed 200 μm tungsten and copper wires, in ~2-cm diameter water cylinders with resolutions of 8 μm and 32 μm. The wires were exploded by a ~30-kA, 500-ns compact pulser, and 128 radiographs, each with a 100-ps X-ray pulse exposure, spaced at 704 ns apart were taken in each experiment. Abel inversion was used to obtain the density profile of the wires, and the results are compared to two dimensional hydrodynamic and one dimensional magnetohydrodynamic simulations.

View Accepted Manuscript (DOE)

Research Organization:: Cornell Univ., Ithaca, NY (United States)

Sponsoring Organization:: Engineering and Physical Sciences Research Council (EPSRC); USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: NA0003764; SC0018088

OSTI ID:: 1614419

Alternate ID(s):: OSTI ID: 1477905

Journal Information:: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 15 Vol. 124; ISSN 0021-8979

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Use of synchrotron-based radiography to diagnose pulsed power driven wire explosion experiments Theocharous, S. P.; Bland, S. N.; Yanuka, D. Review of Scientific Instruments, Vol. 90, Issue 1 https://doi.org/10.1063/1.5055949	journal	January 2019
Synchrotron based X-ray radiography of convergent shock waves driven by underwater electrical explosion of a cylindrical wire array Yanuka, D.; Theocharous, S.; Efimov, S. Journal of Applied Physics, Vol. 125, Issue 9 https://doi.org/10.1063/1.5089011	journal	March 2019
X-ray radiography of the overheating instability in underwater electrical explosions of wires Yanuka, D.; Rososhek, A.; Theocharous, S. Physics of Plasmas, Vol. 26, Issue 5 https://doi.org/10.1063/1.5089813	journal	May 2019
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Effects of water states on the process of underwater electrical wire explosion under micro-second timescale pulsed discharge Han, Ruoyu; Wu, Jiawei; Zhou, Haibin The European Physical Journal Plus, Vol. 135, Issue 1 https://doi.org/10.1140/epjp/s13360-019-00048-5	journal	January 2020

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71 CLASSICAL AND QUANTUM MECHANICS
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Multi frame synchrotron radiography of pulsed power driven underwater single wire explosions

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