| 简介 |
摘要：在我国惯性约束聚变大科学工程背景下，开展Z-pinch 驱动靶丸聚变中子时空信息图像诊断技术应用基础研究，为国家靶丸聚变试验做必要的技术储备。在已有相关研究基础上开展以下诸项研究：以聚合物基复合材料为原材料开展Z-pinch半影针孔优化设计与工艺研究，为成功制造出半影成像针孔开辟一条经济而实用的新技术途径；研究采用半影针孔后屏蔽体限束方法大幅度提高成像系统量程动态范围，以实现大尺度Z-pinch驱动靶丸聚变的边缘检测，从而为判断聚变等离子体稳定性提供可靠的实验依据；研究液体闪烁光纤阵列的优化设计方法和制造工艺，解决质子串扰和Z-pinch 驱动靶丸聚变存在的高X射线本底条件下的中子甄别等问题；开展基于神经网络模型的系统辨识方法研究，以解决在成像系统点扩散函数未知条件下的图像重建问题；建立基于遗传算法的时空交汇重建算法，为实现Z-pinch 驱动靶丸聚变中子分幅成像奠定基础。
关键词：Z-pinch；中子；半影针孔；动态范围；图像重建
Abstract: In the context of national big scientific project in inertial confinement fusion，neutron spatial-temporal image information diagnostic technique for Z-pinch driven target fusion would be carried out as to make necessary technical reserve for national test of target fusion. In the basis of our existing related research,the following studies would be implemented：The optimal design and technology of Z-pinch driven targets fusion penumbra imaging pinhole prepared with the materials of polymer-matrix composite would be developed to open a new technology of economic and practical way for penumbra imaging pinhole manufacturing successfully；in order to realize the edge detection of large scale Z-pinch driven targets and then provide reliable experimental basis for judging the fusion plasma stability, the method of greatly widening imaging system dynamic range using shield would be studied; the optimal design method of liquid scintillation fiber array and manufacturing process would be developed, and the problems such as proton crosstalk, the neutron discernment under the condition of high X-ray background in Z-pinch driven targets fusion process, etc would be solved; the system identification method based on neural network model would be studied and then to realize the image reconstruction in condition of unknown PSF of the imaging system; based on the genetic algorithm, the spatial-temporal intersection reconstruction algorithm would be established to lay the foundation for realizing neutron framing imaging in the Z-pinch driven target fusion process.
Keywords:Z-pinch, Neutrons, penumbra pinhole, dynamic range, image reconstruction |
(创新港)
