Simulation of Z-Pinch Processes of Nested Tungsten Wire-Arrayon Angara-5-1 Facility

Abstract

Based on the hydrodynamic shell-on-shell collision model, the Z-pinchprocesses of nested tungsten wire-array in Sino-Russian joint experimentson Angara-5-1 facility are simulated by means of our one-dimensionalthree-temperature radiation magneto-hydrodynamic code. The results showthe evolutions of x-ray radiation burst, implosion trajectories ofinterfaces, current transfer in inner and outer wire-array plasmas, andthe temporal and spatial changes of magnetic field and current densityin the process. About 20% of the total driven current is transferred intothe inner wire-array plasma by convection and diffusion of magneticfield when the two shells are pinched closest. Compared to the measuredx-ray power, the simulated full width at half maximum and time at thestrongest radiation agree approximately with the measured values. It isalso demonstrated in our simulation that the radiation of nestedwire-array Z-pinch is enhanced. The effects of fluctuations of drivencurrent on yields of x-ray are also investigated.