高Z梯度掺杂靶丸原子浓度三维分布测量原理及方法研究

项目名称： 高Z梯度掺杂靶丸原子浓度三维分布测量原理及方法研究

项目编号： No.11504350

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 数理科学和化学

项目作者： 王宗伟

作者单位： 中国工程物理研究院激光聚变研究中心

项目金额： 20万元

中文摘要： 在惯性约束聚变研究中，高Z元素梯度掺杂微型靶丸作为聚变燃料的存储单元，其掺杂层在聚爆时将燃料同超热电子隔离，降低通过烧蚀层的X射线通量及X射线对DT燃料冰层的预热程度，所以对聚变点火物理实验起着至关重要的作用。基于惯性约束聚变物理实验对高性能梯度掺杂靶丸的掺杂均匀性要求和对梯度掺杂表征的精密化要求，本课题旨在利用显微CT投影成像技术、反向重建技术、吸收相衬二元性理论、掺杂元素吸收理论等，开展基于显微CT反重建原理的梯度掺杂靶丸掺杂原子浓度的三维分布表征原理和方法研究，进而实现掺杂原子浓度的实时表征和三维表征。为激光聚变物理实验提供精确、全面的掺杂原子浓度分布数据，实现聚变点火过程中靶丸参数的精确掌控。开展梯度掺杂靶丸原子浓度三维分布测量原理和方法研究是我国点火靶研究的重要方向之一，具有强烈紧迫性和必要性。

中文关键词： 梯度掺杂；靶丸；原子浓度；层析成像；三维分布

英文摘要： In the research of inertial confinement fusion, high-Z gradient-doped micro-capsules are used as storage cells, in which the doped layer can insulate hot electron from fusion fuel, decrease x-ray flux and degree of preheating for which x-ray heats DT ice-layers in the period of nuclear fusion. For the need of doping uniformity of doped capsules with high performance and precise characteristic for gradient-doped capsules, this issue is proposed for three-dimensional doping distribution of gradient-doped capsules based on micro-CT projection, back-projection ,duality theory for absorption and phase contrast, absorption theory of doped elements. The primary contents are real-time and three-dimensional doping distribution of gradient-doped capsules based on back-projection. The goal is to offer precise and full-scale doped concentration for exact control in ICF research. The research for three-dimensional doping distribution of gradient-doped capsules is one of the most important contents in ignition targets of our country, and is necessary to be done.

英文关键词： gradient-doped;capsules;Atom concentration;tomography;three-dimensional distribution