双盘靶X光辐射光谱时空特性

在“星光－Ⅱ”激光装置上，利用三倍频激光辐照金双盘靶，研究Ｘ光辐射光谱时空特性。将４针孔透射光栅阵列和皮秒分幅相机结合，实现了Ｘ光辐射时间、空间、能谱三维联合测量，得到了双盘靶初级和次级辐射光谱结构，观测到Ｘ光辐射弛豫过程，并得到Ｎ带Ｏ带和零级光谱强度随时间和空间的变化特征、等离子体喷射二维空间分布、等离子体膨胀速率等重要结果。

Investigation on X-Ray Spectra Characteristic for Double-Disk Target

The gold double-disk targets were irradiated by 3ω0 laser, and time-space properties of X-ray spectra were investigated at “Xingguang” laser facility. A four-pinhole transmission grating array and a picosecond frame camera were combined, and the three-dimensional measurement of X-ray time, space and energy spectra was conducted on the laser shotting region and X-ray radiation ablating region. The X-ray relaxation process and some important physics results such as the N band, O band and 0th spectra versus time and space as well as two-dimensional spatial distribution of plasma jet and plasma expansion speed were observed.