摘要
Implosion asymmetry is a crucial problem quenching ignition in the field of inertial confinement fusion.A forward-calculation method based on 1D and 2D hydrodynamic simulations has been developed to generate and study the x-ray images of hot-spot self-emission,indicating asymmetry integrated over the entire drive pulse.It is shown that the x-ray imaging photon energy should be higher to avoid the influence of the remaining shell.The contour level(percentage of the maximum emission intensity)and spatial resolution should be as low as possible,optimally less than 20%and 3μm,for characterization of higher-mode signatures such as Ps-P12 by x-ray self-emission images.On the contrary,signatures of lower-mode such as P2 remain clear at all contour levels and spatial resolutions.These key results can help determine the optimal diagnostics,laser,and target parameters for implosion experiments.Recent typical hot-spot asymmetry measurements and applications on the Shenguang 100 kJ class laser facility are also reported.
作者
董云松
康洞国
蒋炜
刘志诚
陈忠靖
张兴
李欣
孙传奎
尹传盛
董建军
杨志文
蒲昱东
晏骥
余波
黄天晅
缪文勇
戴振生
葛峰峻
杨冬
王峰
杨家敏
江少恩
Yunsong DONG;Dongguo KANG;Wei JIANG;Zhicheng LIU;Zhongjing CHEN;Xing ZHANG;Xin LI;Chuankui SUN;Chuansheng YIN;Jianjun DONG;Zhiwen YANG;Yudong PU;Ji YAN;Bo YU;Tianxuan HUANG;Wenyong MIAO;Zhensheng DAI;Fengjun GE;Dong YANG;Feng WANG;Jiamin YANG;Shaoen JIANG(Research Center of Laser Fusion,Chinese Academy of Engineering Physics,Mianyang 621900,People's Republic of China;Institute of Applied Physics and Computational Mathematics,Beijing 100088,People's Republic of China;Department of Engineering Physics,Tsinghua University,Beijing 100086,People's Republic of China)
基金
National Key R&D Program(No.2017YFA0403204)
Laser Fusion Research Funds for Young Talents(No.RCFPD1-2017-1)。