Two-Dimensional Numerical Simulation of Axial Magnetic Flux Compression in Z-θ Pinch Configuration

There are ideas to combine advantages of inertial and magnetic approaches to issues of controlled nuclear fusion, when high enough magnetic field, applied to the system, is able to localize thermonuclear plasma in space, suppress diffusion heat outflow and alpha particles losses from the syntheses area. It is shown theoretically that obtaining of ultra-high (up to 100 MG) magnetic fields could be achieved by radial compression of initial axial magnetic field in Z-θpinch configuration. Existence of the magnetic field "shear" in such plasma systems stipulates their high stability to various magnetohydrodynamic (MHD) instabilities development, able to destroy initial cylindrical symmetry of the configuration. Stable >20-fold radial compression of annular plasma shell, formed by hollow gas-puffs, were obtained in different experiments with Z-θ pinches in the currents amplitude of 1.2-7.5 MA. Study of the processes in Z-/sp0l theta/ pinch, formed by multi-wire array, is of independent interest from the points of view of diagnostics and investigation of multi-wire liners implosion physics. In this paper we present calculation results of longitudinal magnetic field compression at sub-microsecond Z-θpinch implosion, powered with current of ~6 MA amplitude from helical magnetocumulative generator (MCG) of 200 mm diameter, equipped with explosive current opening switch (EOS).