Early Stage of the Explosion of Thin Flat Foils in a High-Current Diode at a Current of 40–80 kA

Journal Article · 23 July 2019 · Journal of Experimental and Theoretical Physics

DOI: https://doi.org/10.1134/S1063776119050157 · OSTI ID:1543424

Tilikina, I. N. ^[1]; Shelkovenkoa, T. A. ^[2]; Mingaleeva, A. R. ^[2]; Romanovaa, V. M. ^[2]; Pikuz, S. A. ^[2]

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1. Russian Academy of Sciences (RAS), Moscow (Russian Federation). Lebedev Physical Inst.; Cornell University
2. Russian Academy of Sciences (RAS), Moscow (Russian Federation). Lebedev Physical Inst.

The initial stage of the nanosecond explosion of 1–15 μm-thick flat foils in a diode with a current of 40–80 kA is studied. Projection radiography is used to take images of exploded foils at a spatial resolution of 3–4 μm using the soft X-ray radiation (E = 2.5–5 keV) of a hybrid X-pinch and at a time resolution of 0.1 ns. Foil strips 0.3–2 mm wide and 0.5–7 mm long were introduced in the return circuit of the diode in a high-current BIN generator with a current amplitude of 270 kA and a current rise time of 100 ns; the main load of the generator is an X-pinch. The experiments demonstrate that small-scale structures, the shape and the size of which depend on the foil material and the current density and distribution in a foil, are formed in a foil. Possible scenarios of the structure formation are discussed.

• Research Organization: Cornell Univ., Ithaca, NY (United States); Russian Academy of Sciences (RAS), Moscow (Russian Federation)
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA)
• Grant/Contract Number: NA0003764
• OSTI ID: 1543424
• Journal Information: Journal of Experimental and Theoretical Physics, Journal Name: Journal of Experimental and Theoretical Physics Journal Issue: 6 Vol. 128; ISSN 1063-7761
• Publisher: SpringerCopyright Statement
• Country of Publication: United States
• Language: English