改进型双盘靶实验与分析

 采用改进型双盘靶结构,初级改用为斜柱腔结构,激光加热初级薄箔,后向出射的X光烧蚀次级,这样降低初级等离子体喷射的影响,使烧蚀次级的X光更纯净。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象,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,研究次级盘对初级发射的X光谱的改造。测量结果表明：这种结构的双盘靶基本上能避免初级盘喷射等离子体的影响,初级盘后向辐射的X光谱具有明显 的N和O带谱结构,而次级辐射的X光谱主要以O带为主。

Experiments and analyses on improved double disk targets

Improved double disk targets are used to investigate X ray re emission from gold material heated by radiation. The primary disk is an oblique cylinder cavity. X ray radiation emitted from the Au foil in the rear of the cavity ablates secondary Au disk. Thus plasma expansion's effect of primary disk on secondary disk is reduced, and then the X ray radiation ablating secondary disk is "pure and clear". An X ray streak camera is used to measure time space images of double disk targets. Two soft X ray spectrometers are used to measure X ray spectra of primary and secondary disk respectively. The property that X ray spectra were modified on secondary disk is investigated. The measured results show that the improved double disk targets can basically avoid plasma expansion's effect from primary disks and the spectra from primary disk consist of N and O bands, but the spectra from secondary disk is mostly O band.