Al激光等离子体电子温度的时间分辨诊断

 将门控分幅相机与平面晶体谱仪耦合，构成时间分辨光谱测量系统，对Al激光等离子体的K壳层发射谱进行测量，获得了相对入射激光延迟约1ns，积累时间约200ps的光谱信号。利用稳态碰撞-辐射平衡（CRE）近似条件下的等离子体光谱辐射动力学模型，给出了Al激光等离子体Ly-β线与He-β线强度比以及Ly-γ线与He-γ线强度比与电子温度的函数关系。在此基础上，根据实验谱线强度比，得到激光强度为2.319×10¹⁴，1.937×10¹⁴和3.946×10¹⁴ W/cm²时，等离子体冕区电子温度分别为1.190(1±27%)，1.165(1±27%)和1.525(1±27%)keV。

Time-resolved diagnosing of the electron temperature of laser-produced aluminum plasma

Time-resolved measurement system of X-ray spectroscopy was constructed by coupling a gated MCP with a flat crystal spectrometer, and the K-shell emission spectra from the corona of laser-irradiated aluminum plasma, were measured with a time delay of about 1ns and with an exposure time of about 200ps. Using the approximation of steady collisional-radiative equilibrium model, the interstage line intensity ratios of the K-shell lines of aluminum were given as a function of electron temperature and density. The electron temperatures were deduced from the line intensity ratios. The diagnosed electron temperatures of the plasmas were 1.190(1±27%),1.165(1±27%), and 1.525(1±27%)keV respectively at laser intensity of 2.319×10~(14), 1.937×10~(14), and 3.946×10~(14)W/cm~2