Production of Very High Magnetic Fields by Flux Compression

Abstract
Some theoretical aspects of the implosion technique of attaining magnetic fields in the megagauss region are discussed. The temperature rise at the conductor surface is estimated, taking into account the change in resistivity with temperature. At all field levels the magnetic pressure should prevent loss of conductor by evaporation. Flux leakage due to finite conductivity is analyzed, allowing for the variation of resistivity and penetration depth during compression; to account for reported fields as high as 14 MG, the temperature coefficient of resistivity under implosion conditions must be at least two orders of magnitude lower than at normal pressures.

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