高功率密度软X射线在X光导管中传输效率测量

为优化软X射线聚束透镜设计参数，使之与等离子体辐射源组合来获得洁净的高功率密度宽能带的软X光束，在西北核技术研究所的强光一号加速器装置上，对高功率密度的软X射线（6×10^6～1．5×10^7W／cm^2）在X光导管中的传输特性进行研究。研究结果表明：对于DM308型号玻璃材料拉制成的X光导管，在该功率密度范围内，软X射线在X光导管中的传输没有出现非线性效应，随着入射软X射线功率密度的提高，出射软X射线功率密度基本成线性增大；当入射软X射线的功率密度为1．2×10^7W／cm^2时，实验中获得X光导管的平均传输效率达到了16．3％。在强光一号加速器装置上，使用由该规格X光导管制作的软X射线聚柬透镜与钨丝阵Z-pinch等离子体辐射源组合，获得了功率密度达2．1×10^9W／cm^2的宽能带的软X光源。

Transmission efficiency of high power density soft X-ray through capillary

In order to optimize the soft X-ray lens design, obtain high power density soft X-ray without other particles by combining it with plasma radiant point, experiments of measuring transmission efficiency with the power density range of 6×106～1.5×107 W/cm2 for the X-ray capillary on Qiangguang Ⅰ facility were carried out. The results show that, for the capillary of glass DM308, basically, the power density of the output soft X-ray from the capillary is linear with the power density of the incidence soft X-ray; when the power density of the incidence soft X-ray is 1.2×107 W/cm2, the average transmission efficiency is 16.3%. Based on the experiment results, soft X-ray lens were made, and power density 2.1×109 W/cm2 of soft X-ray without plasma fragment was obtained at the focal point.