双驱动x射线激光等离子体能谱特性研究

用时间积分空间分辨的平晶千电子伏谱仪测量了钽激光等离子体发射波长范围为045— 075nm的软x射线能谱，精确测量和准确辨认出类镍、类钴和类铁离子的共振线及类镍离子 的内壳层跃迁线-对实验结果处理，获得了辐射线谱的强度-通过谱线比率的诊断推断脉冲激 光时差对等离子体状态的影响，至少也可部分解释激光上能级的粒子数及等离子体的 电离程度- 关键词： 离子谱特性 软x线能谱强度 谱线辨认

Spectral characterization of double-driven x-ray laser plasmas

A soft x ray spectra of double driven laser produced Ta plasmas is measured by a time integrated space resolved keV crystal spectrometer from 0 45 to 0 75nm. Some resonant transition of the Ni like, Co like and Fe like ions and some intrashell transition of the Ni like ions are identified. The experimental results have been processed, the spectroscopic line intensity of the higher ionization stages is obtained. The effect of the double\|laser driven time difference on the plasma condition is inferred through the spectroscopic line ratio diagnostics. The results obtained can, at least in part, give a good explanation of the upper lasing level population and the ionization properties of the plasmas.