毛细管放电激励软x射线激光的产生时间

利用x射线二极管(XRD)，实验上测量了毛细管放电激励下类氖氩469nm软x射线激光的尖 峰信号. 改变毛细管的充气气压和主脉冲放电电流，研究了激光尖峰的产生时间随实验参数 的变化情况. 实验结果表明，激光产生于主脉冲电流波形的前沿，此时的主脉冲电流是其峰 值的65%—75%. 增加毛细管充气气压或者减小主脉冲峰值电流，激光的产生时间将会稍有延 迟. 同时改变毛细管充气气压时，激光尖峰信号在42Pa存在最大值. 关键词： 毛细管放电 软x射线激光 激光产生时间

The lasing time of soft x-ray laser pumped by capillary discharge

The laser spike of Ne_like argon at 469nm pumped by capillary discharge is mea sured with x_ray diode. Changing the pressure of Ar gas filled in the ceramic ca pillary and the peak value of the main discharge current, we study the effects o f experimental parameters on lasing time, which is the time of spike after the o nset of the main discharge current. The experimental results show that the soft x_ray laser is produced at the rise_time of the main discharge current which is 65%—75% of the peak at the lasing time. The lasing time can be delayed several ns when the pressure increases from 28Pa to 55Pa or the peak of main discharge c urrent decreases. In addition, there is maximum amplitude of the laser spike abo ut 42Pa.