基于Abel逆变换的辐射驱动内爆壳层密度分布研究

给出了一种利用Abel逆变换反演壳层压缩密度分布的方法. 使用微焦点X射线光源对直径1 mm、 密度已知的空心CH球壳进行了透射照相, 通过Abel逆变换反演得到了空心CH球壳的壳层密度, 反演密度与实际密度符合, 表明通过Abel逆变换反演壳层密度的有效性. 对16分幅相机记录的辐射驱动内爆靶球图像进行Abel逆变换, 得到了不同时刻壳层压缩密度分布.定性分析了背光空间分布、 针孔成像系统和壳层厚度变化对密度反演的影响.

Study on the spatial distribution of implosion shell based on the inverse Abel transform

A method of solving spatial distribution of shell density by inverse Abel transform is presented. CH sphere imaging on the micro-focus X-ray source is implanted to test the method of inverse Abel transform. The reversion of shell density is in agreement with real density, which verifies the correctness of the method. The 16-fram implosion target images are processed by inverse Abel transform, and the distributions of compressed shell density at different times are obtained. Qualitative analysis of back-lighter distribution, pinhole imaging and variation of shell thickness is proposed for inverse Abel transform.