Abstract
The use of explosively generated megaoersted fields requires the knowledge of the electrical conductivity at the extreme physical conditions to which these conductors are subjected (at 5 MOe typically, temperature up to 20,000 °K, pressures up to 1 Mbar). The physical problems are in some respects similar to those encountered in the domain of exploding wires. Two different experiments for measuring the conductivity of metals are presented. In the first, the temperature dependence of the electrical conductivity of copper has been obtained by determining the magnetic diffusion into a hollow cylindrical conductor. The results extend up to the temperature at which the conductor explodes. In the second experiment we have measured the magnetic flux penetration into a copper bar and compared the experimental data with the results obtained from a particular theoretical diffusion model. Both experimental methods strongly suggest that, under transient heating conditions, the conductivity of liquid copper decreases much less with increasing temperature than expected.
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Knoepfel, H., Luppi, R. (1968). The Electrical Conductivity of Metals at Very High Temperatures. In: Chace, W.G., Moore, H.K. (eds) Exploding Wires. Springer, Boston, MA. https://doi.org/10.1007/978-1-4899-7328-3_19
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DOI: https://doi.org/10.1007/978-1-4899-7328-3_19
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