A post-processing code for two-dimensional non-LTE LARED-H code is developed.Based on the plasma states of hohlraum from LARED-H simulation, the steady-state multi-group photon transport equation is solved to give an effective temperature. Calculated results are compared with the experimentally measured ones at the Shenguang-Ⅱ(SG-Ⅱ) laser facility.

A three-dimensional ray-tracing method for laser propagation in plasma and an algorithm of heat flow for electronic conduction are briefly described.A convenient calculation scheme for solving the non-equilibrium P_n equations is also presented.By using these methods and the newly developed LARED-H code,the two-dimensional simulations for the laser-irradiated gold disk and ring target are preformed.The reasonable two-dimensional behaviors of the target plasma are obtained.

This paper presents the numerical method for solving the rate equations of electron's average occupation probabilities by using multiple-time-scale perturbation theory.It is especially suitable for lower levels of elements, Since in that case the transition between neighbouring bound energy levels could be considered as fast, the others as slow. Under some reasonable physical assumptions the method leads to the analytic expressions for P_n as functions of the number of free electron, n_s.As a result, in stead of solvingstrong stitff ordinary ditferential equations of (dp_n)/(dt), we just need solving thedifferential equation for n_e and the algebraical equations for P_n. Therefore the problem is much simplified with avoiding the computation of Jacobi iaverse matrix which generally appears is the implicit schemes.