强激光与粒子束, 2013, 25 (8): 1961, 网络出版: 2013-08-01
ICF激光驱动器间接驱动兼顾直接驱动打靶角度的优化设计
Optimization of beam configuration for direct-driven fusion based on ICF indirect-driven laser facility
ICF激光驱动器 直接驱动 打靶角度 球谐模分析 辐照场分析 ICF laser facility direct-driven fusion beam angle spherical-harmonic mode analysis irradiation field analysis
摘要
为了增加ICF激光驱动器的灵活性,使其可满足多种聚变点火方式,激光驱动器激光打靶角度的优化设计应以间接驱动为主,同时兼顾直接驱动。以神光Ⅲ主机装置为例,基于已有的间接驱动激光打靶角度设计,用球谐模和三维辐照场方法,完成了兼顾直接驱动打靶角度的优化,结果表明优化设计的打靶角度可实现小于1%的球靶表面辐照均匀性。同时分析了激光参数对辐照性能的影响,并获得了满足直接驱动要求的陡边小焦斑设计。
Abstract
To increase the flexibility of ICF laser facility and meet the requirements of indirect-driven and direct-driven fusions, the beam configuration should be optimized. This paper takes the Shenguang Ⅲ as an example facility which was originally designed for indirect-driven fusion. The beam configuration for direct-driven fusion is optimized through spherical-harmonic mode and three-dimensional irradiation field analysis. The optimization results show that the irradiation uniformity of the sphere target surface is less than 1%. Then irradiation uniformity and coupling efficiency are calculated with different laser profiles. The small and steep spot which direct-driven fusion requires is also obtained based on the beam configuration.
李富全, 韩伟, 王芳, 吴文凯, 陈刚, 冯斌, 张小民, 魏晓峰, 李明中. ICF激光驱动器间接驱动兼顾直接驱动打靶角度的优化设计[J]. 强激光与粒子束, 2013, 25(8): 1961. Li Fuquan, Han Wei, Wang Fang, Wu Wenkai, Chen Gang, Feng Bin, Zhang Xiaomin, Wei Xiaofeng, Li Mingzhong. Optimization of beam configuration for direct-driven fusion based on ICF indirect-driven laser facility[J]. High Power Laser and Particle Beams, 2013, 25(8): 1961.