圆偏振飞秒激光脉冲与低压氙气体靶相互作用软X射线辐射实验研究

Experimental Study of Soft X-Ray Radiation in the Interaction of Circularly Polarized Femtosecond-Laser-Pulse with Low Pressure Xenon

利用平场光栅谱仪，分别在2和3kPa的低气压下，测量了脉宽35fs的圆偏振超强超短激光脉冲与5mm长氙气体靶相互作用产生的波长在5～60nm范围内的离子谱线。2kPa时最强的跃迁为XeⅧ：4d^105s（^2S1/2）-4d^95s5p（2P3／2）的17．0856nm线，3kPa时最强的跃迁为11．343nm的XeⅦ4d^105s^2（^1S0）-4d^95s^25f（^3P1）跃迁。两种气压下，Xe均被电离到XeⅦ，XeⅧ，XeⅨ态。

Using flat-field grating Spectrometer, the ions lines with wavelength between 5 and 60 nm were measured, which were produced by the interaction of circularly polarized 35 femtosecond uhraintense and ultrashort laser-pulse with 5 mm length xenon at the pressure 2 and 3 kPa respectively. The highest transition is the XeⅧ： 4d^105s（^2S1/2 ）-4d^95s5p（^2P3/2 ） line at wavelength 17.0856 nm at 2 kPa and 3 kPa, the highest transition is 11. 343 nm line of XeⅦ 4d^105s^2 （^1S0 ）-4d^95s^25f（^3P1 ） transition. The xenon is ionized to XeⅦ, XeⅧ and XeⅨ at both pressure.