A partial l-splitting average atomic model is presented, in which only energy levels that mainly contribute to the X-ray emission are opened to l-splitting. Compared with an all l-splitting average atomic model, the partial l-splitting average atomic model obtains same results, such as electron temperature, plasma density, X-ray spectrum and so on, and saves a large amount of CPU time due to the decreasing of energy level number.

A difference scheme for two-dimensional three-temperature energy equations in Cartesian coordinates is united with that in cylindrical coordinates.The LARED-H (laser radiation electron dynamic holehurm) code is extended to describe physical processes in both coordinates.Physical models are investigated for a line-focused target with different incident angles.Numerical results are given to describe the expanding process of target-plasma.