High-Temperature Cores in Exploding Wires

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Abstract
Our recent studies show that the precipitous rise in resistance during the initial expansion of the wire occurs because of a radially symmetrical, inward travelling, vaporization wave which transforms the wire to a nonconducting gas. Presence of the inward travelling vaporization wave implies longer heating of the wire interior and a temperature rise with decreasing radius. An approximate theory of the expansion is given which allows estimates to be made of the core temperatures achievable by varying the wire and circuit parameters. The experimental production of high‐temperature cores is limited at present by the occurrence of voltage breakdown at the interface between wire and ambient atmosphere.

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