毛细管放电类氖氩X光激光中的准稳态增益

Quasi-static-state gain in Ne-like Ar capillary discharge pumped X-ray laser

利用与全时间相关速率方程组相耦合的一维辐射磁流体力学程序 ,对类氖氩毛细管放电产生 X光激光全过程进行了数值模拟 ,并根据模拟结果 ,深入细致地分析了产生 4 6 .9nm激光线的增益过程 ,指出其较高的增益来自类 Ne离子的高布居和电子温度密度瞬变 ,这与稳态时的低增益情况很不一样 ,通过原子动力学层次的分析 。

According to the calculating result on Ne-like Ar X-ray laser pumped by capillary discharge, with code XDCH (1-D radiation magneto-hydrodynamics coupled to time-dependent rate equations), this paper presents the whole process of producing gain of 46.9 nm laser line. It is shown that higher gain came from higher population of Ne-like ion and faster change of electron temperature and density, different from the lower gain in situation of static state. With the analysis on the viewpoint of atomic kinetics, some helpful advice to experiments are put forward.