短脉冲驱动下膨胀冷却等离子体中软X射线激光研究

SOFT X-RAY LASER IN EXPANSION PLASMA PUMPING BY SHORT PULSED LASER

在解析求解等离子体流体力学方程组的基础上，数值求解了以ＭｇＸＩ为主体的等离子体能级占据数速率方程，进而给出了短脉冲驱动下膨胀冷却等离子体中ＭｇＸＩｌｓ３ｄ－ｌｓ４ｆ激光跃迁增益系数的时空分布，讨论了泵浦激光脉冲宽度对增益的影响。

Using the analytical solutions of the hydrodynamic equations of plasma,energylevel populations of the plasma dominated by He-like Mg ions are obtained by solvi-ng the rate equations numerically for short pulsed pumping laser. Variations of gaincoefficient for MgXI ls3d-ls4f (λ=154)vs time and spatial position are given.Also, the infiuence of the pumping laser pulse duration is discussed.