Effects of the irradiation of a finite number of laser beams on the implosion of a cone-guided target

8th International Conference on Inertial Fusion Sciences and Applications

Yanagawa, T.^1 ; Sakagami, H.^2 ; Nagatomo, H.^3 ; Sunahara, A.^4

Department of Physics, Nagoya University, Furo-cho, Chikusa-ku, Aichi Nagoya

464-8602, Japan^1

Fundamental Physics Simulation Division, National Institute for Fusion Science, Oroshi-cho, Toki, Gifu

509-5292, Japan^2

Institute of Laser Engineering, Osaka University, Osaka Suita

565-0871, Japan^3

Institute for Laser Technology, Osaka Suita

565-0871, Japan^4

关键词: Cone-guided targets;    Direct drive;    Finite number;    Implosion simulation;    Laser absorption;    Non-uniformities;    Osaka University;    Target surface;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/688/1/012127/pdf
DOI  :  10.1088/1742-6596/688/1/012127

来源: IOP

【 摘 要 】

In direct drive laser fusion, the non-uniformity of the laser absorption on the target surface caused by the irradiation of a finite number of laser beams is a sever problem. GekkoXII laser at Osaka University has twelve laser beams and is irradiated to the target with a dodecahedron orientation, in which the distribution of the laser absorption on the target surface becomes non-uniform. Furthermore, in the case of a cone-guided target, the laser irradiation orientation is more limited. In this paper, we conducted implosion simulations of the cone- guided target based on GekkoXII irradiation orientation and compared the case of using the twelve beams and nine beams where the three beams irradiating the cone region are cut. The implosion simulations were conducted by a three-dimensional pure hydro code.