快中子编码成像技术已经成为最重要的聚变诊断技术之一。通过对聚变区快中子进行被动成像，可以获得经压缩发生聚变的等离子体区域的尺度变化及压缩对称性等参数，以诊断内爆对称性、辐射烧蚀、流体力学不稳定性等物理过程，进而指导靶丸与聚变装置的设计和改进。本项目将在既往研究的基础上，深入开展快中子编码成像诊断技术应用研究。具体研究内容包括编码孔和闪烁光纤阵列等关键部件的研制，高适应性源区图像重建算法研发，系统瞄准与偏差校正技术研究和编码成像系统适应性的实验验证研究，同时积极探索基于两轴或三轴的三维中子成像技术。本研究项目的开展，可提升该技术在核聚变装置诊断应用中的适应性，满足核聚变装置精确诊断与改进设计的需求，从而促进国家大科学工程发展。

Neutron coded-aperture imaging has been developed as an important diagnostic for inertial fusion studies in recent decades. It is used to measure the distribution of neutrons produced in deuterium-tritium plasma. Neutron imaging can provide a direct measurement of the spatial extent of neutron-production reactions and the symmetry of plasma compression, which help us to understand radiation ablation, hydrodynamics instability and some other aspects of plasma physics. Based on this information, we can improve the design of the fusion device. On the basis of previous research, we will further study the application of fast neutron coding imaging diagnosis technology in this project. Specifically, the research plan includes manufacture of some key components such as coded aperture and scintillation fiber array, the development of high fidelity source reconstruction algorithm, the research of system alignment and bias correction technology, and the experimental verification of the adaptability of the whole imaging system. Meanwhile, we will explore the three-dimensional neutron imaging technology based on two or three axis imaging. The research project can enhance the adaptability of neutron imaging in the diagnostic of actual fusion devices and meet the requirements of precise diagnosis and improvement of the fusion device, thus promoting the development of national large-scale science projects.