基于Abel逆变换的辐射驱动内爆壳层密度分布研究
Study on the spatial distribution of implosion shell based on the inverse Abel transform
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摘要: 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.Abstract: A method of solving spatial distribution of shell density by inverse Abel transform is presented.CH sphere imaging on the microfocus 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.
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