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

doi:10.1063/1.5089011

Title: Synchrotron based X-ray radiography of convergent shock waves driven by underwater electrical explosion of a cylindrical wire array

Journal Article · Fri Mar 01 00:00:00 EST 2019 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.5089011· OSTI ID:1497403

Yanuka, D. ^[1]; Theocharous, S. ^[1]; Efimov, S. ^[2];

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^[2]; Olbinado, M. P. ^[3];

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Imperial College London, London (United Kingdom). Plasma Physics Group
Technion-Israel Inst. of Tech., Haifa (Israel). Physics Dept.
European Synchrotron Radiation Facility (ESRF), Grenoble (France)

We present x-ray radiography images showing the propagation of shock waves generated by electrical explosion of a cylindrical arrangement of wires in water driven by pulsed power. In previous experiments [S. N. Bland et al., Phys. Plasmas 24, 082702 (2017)] the merger of shock waves from adjacent wires has produced a highly symmetrical, cylindrical shock wave converging on the axis, where it is expected to produce a high density, strongly coupled plasma ideal for warm dense matter research. However, diagnostic limitations have meant that much of the dynamics of the system have been inferred from the position of the front of the cylindrical shock and timing/spectra of light emitted from the axis. Here we present synchrotron-based radiography of such experiments – providing direct quantitative measurements on the formation of the convergent shock wave, the increased density of water on axis caused by its arrival, and its ‘bounce’ after arrival on axis. The obtained images are compared with twodimensional hydrodynamic simulations which reproduce the observed dynamics with a satisfactory agreement in density values.

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

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: NA0003764; SC0018088

OSTI ID:: 1497403

Journal Information:: Journal of Applied Physics, Vol. 125, Issue 9; ISSN 0021-8979

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

Country of Publication:: United States

Language:: English

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Cited by: 9 works

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References (21)

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