放电参数对毛细管放电泵浦的软X射线激光的影响

 以哈尔滨工业大学可调谐激光技术国家重点实验室中的Marx发生器的放电脉冲波形为基础，理论上模拟计算了在不同放电参数下充氩气的毛细管放电产生的等离子体状态和类氖氩离子3p_3s跃迁线的增益系数的时空演变过程。中心模型中，选取内径为3.1 mm 的陶瓷毛细管并充入初始密度为1.07×10^-6g·cm^-3的氩气，电流脉冲峰值为27.81 kA，脉冲宽度为61.4 ns。改变放电参数进行模拟，结果表明：上升前沿越陡，则增益系数越大，电流脉冲上升时间在20~40 ns，电流峰值在25~40 kA，电流脉冲宽度在50~70 ns范围内，毛细管放电产生的等离子体状态比较理想，可获得较高的增益系数。

Influence of discharge parameters on capillary discharge-pumped soft X-ray laser

Based on the wave shape of Marx device at National Key Laboratory of Tunable Laser Technology, Harbin Institute of Technology, the influence of discharge parameters upon the temporal evolvement of capillary discharge produced plasmas conditions and the gain coefficient of 3p—3s transition in Neon-like Ar was simulated. In the simulation, argon with a density of 1 07×10~(-6) g·cm-3 was filled into a ceramic capillary with an inner diameter of 3.1 mm, the peak of the discharge current pulse was 27.81 kA, and the width of the current pulse was 61.4 ns. The results show that the shorter the pulse rise time is, the higher the gain coefficient is. When the pulse rise time is 20~40 ns, the peak of the current pulse is 25~40 ns, and the current pulse width is 50~70 ns, the higher gain coefficient can be obtained.