在静态气室中,利用线偏振的掺钛蓝宝石(Ti:sapphire)超短脉冲激光(中心波长795nm,脉宽105fs,重复频率10Hz,单脉冲能量50mJ),获得氙气中5～17次(40～160nm)谐波的软X射线激光辐射。实验中着重观察了高次谐波谱线强度随激光强度的变化规律,由于激光强度已经接近甚至超过饱和,高次谐波谱相对强度随入射激光强度增加而增长到一定程度后开始下降,同时观察到介质的离子谱,证实了高次谐波谱的产生与离子辐射之间的转换关系。 In a static gas chamber, a linearly polarized Ti: sapphire ultrashort pulse laser with a center wavelength of 795 nm, a pulse width of 105 fs, a repetition frequency of 10 Hz, and a single pulse energy of 50 mJ was used to obtain a sample of 5 to 17 times ~ 160nm) harmonic soft X-ray laser radiation. In the experiment, we mainly observed the variation of the intensity of the high-order harmonic with the laser intensity. Since the laser intensity has approached or even exceeded the saturation, the relative intensity of the high-order harmonic spectrum began to decrease after the laser intensity increased, The ion spectrum of the medium was observed, confirming the conversion between the generation of high-order harmonic spectra and ionizing radiation.