毛细管放电激励软x射线激光的产生时间

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

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.

The laser spike of Ne-like argon at 46.9nm pumped by capillary discharge is measured with x-ray diode. Changing the pressure of Ar gas filled in the ceramic capillary and the peak value of the main discharge current, we study the effects of experimental parameters on lasing time, which is the time of spike after the onset 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 current decreases. In addition, there is maximum amplitude of the laser spike about 42Pa.