在"星光Ⅱ"激光装置上,利用三倍频激光辐照双盘靶,采用两台软X光谱仪分别对初级和次级辐射的X光进行测量,研究X光谱在次级得到改造的特性,并对实验结果进行简单的物理分析.实验表明,次级辐射的X光谱与初级的X光谱相比得到了软化.采用X光条纹相机测量双盘靶等离子体喷射的时空扫描图像,结果说明,由于双盘距离较近,初、次级喷射的等离子体发生了碰撞.

A kind of double disk gold targets were irradiated by 0.35 μm intense laser at "XINGGUANG Ⅱ" laser facilities and X ray spectra emitted from primary and secondary disk were measured by two soft X ray spectrometers. The properties of X ray spectra modified on secondary disk were investigated. The experimental results were physically analyzed and showed that the X ray spectra emitted from secondary are softened. An X ray streak camera was used to obtain time spatial images emitted from laser plama of double disks targets. The streaking images indicated that collision of plasmas produced by primary and secondary disks occurred because the short distance between double disks.