Non-equilibrium radiation of aluminum wire array Z-pinch implosion

Based on the detailed configurations model, a one-dimensional non-equilibrium magnetohydrodynamics modeling has been developed to study the physical process of aluminum wire array Z-pinch implosion and non-equilibrium radiation. The code solves the transfer of line radiation by using escape probability approximation, and solves the transfer of continuum by using multi-group diffusion approximation. It is shown that the calculated peak power, FWHM (full width at half magnitude) and total energy of the radiation pulse accord well with the experimental results besides the agreement of the dynamics of Z-pinch implosion. The energy spectrum of the total radiation has been discussed, which shows the substantial importance of non-equilibrium radiation in Z-pinch implosion. The role of three channels of radiation including line radiation, recombination radiation and Bremsstrahlung radiation has been evaluated. In addition, the method to diagnose electron temperature using high energy continuum has been discussed, which shows that a modified factor smaller than unity should be multiplied to the derived electron temperature from the energy spectrum because of the absorption of radiation. (authors)