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The plane one-dimensional problem of the diffusion of a megagauss field into a metal wall is solved taking into account heat conduction and radiation transfer. At the interface, the magnetic field is assumed to be constant, and in this sense, the problem is close to the self-similar diffusion problem with parameters dependent on the self-similar variable x/ √ t. It is shown that if heat conduction and radiation transfer are taken into account, in megagauss fields (in the examined formulation for fields B > 1.6 MGs) there is no loss of conductivity of the material evaporated by the magnetic field because of the formation of a plasma layer at the interface with a temperature in the electronvolt range. However, the role of the plasma layer in the structure of the skin layer remains insignificant up to fields B ≈ 10 MGs.

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AbstracfTo study dynamic strength of materials according to the initial liner perturbation'growth in Rayleigh-Taylor insta-bility development, three-layer liner systems driven by azimuthal magnetic field pressure have been suggested. This paper demodtrates that 0.4-m-diameter disk EMG ensuring currents up to -70 MA can be used for this pur-pose. In the three-layer liner systems, the liner shock-free loading to more than 1 Mbar pressures is therewith possi-ble, with the pressures rising for times longer than 1 ps or longer than 0.3 ps in different systems. Here the shock loading of the liners under study is possible up to 3 -4 Mbar pressures.Examples of 2D computations of the initial perturbation growth in the liners under study at shockfree and shock pressures up to 1 Mbar, strain rates up to 10' sec-', and strains up to 200 % are given.

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