Abstract
A physically correct and mathematically rigorous solution of the problem on the structure of an electromagnetic field formed when a shock wave enters a conducting half–space in a transverse magnetic field is obtained. It is shown that only physically grounded boundary conditions lead to a noncontrovercial pattern of the electromagnetic field and a system of currents in a conductor. The main parameters and characteristic times are found, which determine the structure of current waves in a metal. The solution in the uncompressed region is determined by the parameter R1 = µ0σ1D2t and that in the compressed region by the parameter R2 = µ0σ2(D—U)2t (σ1 and σ2 are the electric conductivities of the uncompressed and compressed substance, respectively, µ0 is the magnetic permeability of vacuum, D is the wave–front velocity, U is the mass velocity, and t is the time). The parameter for the compressed substance R 2 coincides with the parameter obtained previously for the shock–wave dielectric—metal transition; the governing parameter for the uncompressed substance R 1 is obtained for the first time. The asymptotic solutions of the problem for small and large times and the special case R 1 = R 2 considered help in understanding the physical meaning of the solution found.
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Gilev, S.D., Mikhailova, T.Y. Electromagnetic Field and Current Waves in a Conductor Compressed by a Shock Wave in a Magnetic Field. Combustion, Explosion, and Shock Waves 36, 816–825 (2000). https://doi.org/10.1023/A:1002871126669
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DOI: https://doi.org/10.1023/A:1002871126669