The self-modified quasi-stationary model for radiation ablation has been established in this paper based on physical picture of numerical simulations. The objective of the model is to predict quantitatively the scaling laws of various ablation parameters driven by soft-X-ray, such as the dependence of ablation depth, pressure on radiation temperature, energy, pulse width, without resorting to complex computer simulations. The computational results are given fot some interstng materials in ICF. Scaling laws obtained in this paper are simple and effective in target design and analysis of experimental results.

The influence of electron thermal conductivity on the laser x-ray conversion in the coupling of 3w, laser with Au plane target has been investigated by using a non-LTE radiation hydrodynamic code. The non-local electron thermal conductivity is introduced and compared with the other two kinds of the flux-limited Spitzer-Harm description. The results show that the non-local thermal conductivity causes the increase of the laser x-ray conversion efficiency and important changes of the plasma state and coupling feature.

In this paper, an one and a half dimensional (1(1/2)-D, one space dimensionand two velocity dimension) plasma cloud-in-cell simulation code (CIC) has beendeveloped. It is used to study SRS in laser-plasma targets from the Shenguang-12# Nd-glass laser facility (λ=1.053μm,τ= 850ps IL= 3×1014—3×1015W/cm2). The results on the linear growth rates of the scattering electromagnetic waves and Lan-gmuir waves and nonlinear saturation are obtained in detail. Other results such as the time development of the electron distribution function and temperature and fraction of hot electron are also presented. In addition,temperature of thermal electron (1.4-2.5keV) in the underdense coronal plasma region is determined by spectrum analysis of SRS light, as well as contour figure for density distribution and averagedensity (0.12-0.14nc, n=1/4nc). These results agree with experiments.

In this paper,dielectronic recombination process is proposed as two independent processes resonant capture(inverse Auger) process and radiative decay process,which can be used- conveniently in the varied plasmas environments.Through the quantum defect theory,a simplified- analytical formula is introduced to calculate the Auger rate and the theoretical results have been- compared with a simplified relativistical configuration interaction calculation.Finally,a method for- applying the formula to the average atom model is given.

This paper analyzes nonequilibrium ionization problem by using multiple-time-scale perpurbation theory. The processes which are responsible for electron's average occupation probabilities Pn generally have much different time scales. In this paper the transitions between two neighbouring bound energy levels are considered as fast, the others, including the ionization processes, as slow. It is especially suitable for lower levels of high Z elements. The theory presented here gives analytic expressions for Pn as functions of ne, the number of free electrons. As a result, instead of solving equitions of dPn/dt we just need solving the differential equation for ne. So the problem is much simplified with avoiding the strong stiff which exists in equations dPn/dt. When radiation field reaches the Planck distribution, the Pn obtained here can naturally change into the Fermi-Dirac distribution.