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Title: Study of the structure of exploding flat foils at superhigh current density

Journal Article · · Journal of Applied Physics
DOI: https://doi.org/10.1063/5.0019330 · OSTI ID:1725781

We have investigated the features produced in flat metal foils as a result of nanosecond explosions and phase transitions at current densities of (0.1–2) • 109A/cm2. Thin foils made of aluminum, copper, nickel, and titanium, with thicknesses of 1–15 μm, were tested. Here, the exploded foil structure was studied using X-pinch radiography and laser shadow imaging. Al, Ti, and Cu (5 and 7 μm thick) foils had an initial two-dimensional structure. At the same time, no apparent structure was registered in 1 μm Cu and 5 μm Ni foils. Experiments on generators with different output parameters have shown that the dominant structures that developed in the explosion are either cracks or bubbles and may depend on the orientation of the initial structure in the thin foil with respect to the current direction. In addition, the energy deposited in the foil differs by a factor of about 1.5 for the orthogonal vs parallel current and initial foil structure directions.

Research Organization:
Cornell Univ., Ithaca, NY (United States); Russian Academy of Sciences, Moscow (Russia)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
NA0003764; 18-02-00631
OSTI ID:
1725781
Alternate ID(s):
OSTI ID: 1970675
Journal Information:
Journal of Applied Physics, Vol. 128, Issue 20; ISSN 0021-8979
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English

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