【摘要】 利用核微探针系统,结合离子束分析技术,对ICF靶丸参数进行表征。采用质子激发X射线荧光分析(PIXE)测量靶丸掺杂元素钙(Ca)的空间分布,采用卢瑟福背散射(RBS)分析测量靶丸组成元素碳(C)、氧(O)的相对含量和空间分布,采用扫描透射离子显微术(STIM)获得靶丸面密度二维分布图像。该方法灵敏度高(可达到10 6量级)、无损,可以对靶丸中多种元素同时进行分析,不但可给出元素组成及含量信息,还可精确表征元素在空间中的分布信息,空间分辨率可达微米量级。更多还原

【Abstract】 Background: Inertial Confinement Fusion(ICF) now is one of the fastest-growing major fields in the world,and the study mainly focuses on the measurement of ICF targets filled with deuterium and tritium gases,which is a major unresolved technical problem and seriously hamperes the development of target fabrication technology in China.Purpose: We use nuclear analytic techniques based on nuclear microprobe system to measure the parameters of ICF targets,including the structural elements’ content and distribution,the distribution of doped element and the distribution of density.Methods: Proton Induced X-ray Emission(PIXE) is utilized to measure the distribution of dopant element Ca in ICF targets doped with Ca or not.Rutherford Back Scattering(RBS) is utilized to measure the contents of C and O and the distributions in ICF targets.Scanning Transmission Ion Microscopy(STIM) is used to measure the distribution of density.Results: The PIXE results show that the distribution of dopant Calcium is not uniform,and the ring-enrichment region indicates that the capsule is already broken.The RBS detects the thickness of each layer and the content ratios of Carbon,Oxide and Hydrogen as well as their distributions.And the STIM results show that the distribution of density is not homogeneous,neither the energy loss.Conclusions: Ion beam analytic techniques including PIXE,RBS and STIM based on nuclear microprobe system have their advantage in the measurement of ICF target.It is non-destructive,and can give the elemental content and their distribution of multi-element in the order of several micrometer.更多还原