Calculation Method of Radiation Spectral Transfer in Frameworks of Two-Dimensional Magnetohydrodynamic Code FLUX-rz

A magnetohydrodynamic model of irradiating Z-pinch is the basis of a 2-D (in Euler cylindrical coordinates r-z) computer code FLUX-rz developed in VNIIEF (Russia). Earlier, the code considered the thermal radiation transfer in one-group (gray) diffusion approximation. This paper presents a modification of the FLUX-rz code in which we realized a multigroup diffusion model of the radiation transfer. Efficiency of an improved algorithm has been demonstrated by sample calculations of Shot 52 and Shot 567 on Z-machine at Sandia National Laboratories (U.S.).

I. Introduction

Currently, the scientific and Technical Center of Physics in VNIIEF continues with the research program of creating high-power pulsed soft X-ray radiation (SXR) sources [1]. The task of calculation and theoretical support of the experiments on multiwire liner-system implosion powered by a current from magnetocumulative energy generators is urgent.