| High energy density is one of the main research fields in physics. The electro-magnetic implosion is one of ways that attain high energy density state under experiment conditions. The electro-magnetic implosion can produce a state of l-100MJ/cm3 in microsecond. So it has especial characteristics in studying nuclear weapon-related hydrodynamic problems, which can't be replaced by others research methods.In this paper the objective is to modify the SSS code and to make it being one dimension MHD (magnetohydrodynamics). The SSS code is an one dimensional code for shock and detonation propagations. The elastic-plastic-hydrodynamic model is used in this code, which it is very important for isentropic compression, material spalling and melt under shock wave loadings.Before reforming the code to be a MHD, the boundary condition of SSS code is modified, so that we can calculate the electro-magnetic implosion of ideal conductive liner, where the magnetic field diffusion is neglected. On the other hand through the numerical simulation and the theoretical analysis, the characteristics of electro-magnetic implosion and detonation driven implosion have been compared, and it is concluded that the ability of driving liners with the electro-magnetic implosion is much stronger than that of detonation driven implosion.The procedure to modify the SSS code is as follow: at first the HOM EOS (equation of state) is replaced by the SESAME EOS, secondly the magnetic force is added to the momentum equation, the ohmic heating rate is added to the energy conservation equation. Finally the magnetic field equation from Maxwell's equations and the current circuit equation are given to complete the MHD equations.We do some calculations for FP-1 experiments with the SSS MHD code and compare theresults with the existing results of numerical simulation. The agreement between the two calculations shows that it is successful for modifying the SSS code to be the SSS MHD code. |
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