Simulation analysis for ion assisted fast ignition using structured targets

9th International Conference on Inertial Fusion Sciences and Applications

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

Fundamental Physics Simulation Research Division, National Institute for Fusion Science, 322-6 Oroshi-cho, Toki

509-5292, Japan^1

Graduate School of Engineering, Hiroshima University, 1-3-2 Kagamiyama, Higashi- Hiroshima

739-8511, Japan^2

Institute for Laser Technology, 2-6 Yamada-oka, Suita

565-0871, Japan^3

Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita

565-0871, Japan^4

关键词: Beam characteristics;    Concave surface;    Cone-guided targets;    Divergence angle;    Heating efficiencies;    Low-density plastic foams;    Simulation analysis;    Static electric fields;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/717/1/012046/pdf
DOI  :  10.1088/1742-6596/717/1/012046

来源: IOP

【 摘 要 】

As the heating efficiency by fast electrons in the fast ignition scheme is estimated to be very low due to their large divergence angle and high energy. To mitigate this problem, low-density plastic foam, which can generate not only proton (H+) but also carbon (C6+) beams, can be introduced to currently used cone-guided targets and additional core heating by ions is expected. According to 2D PIC simulations, it is found that the ion beams also diverge by the static electric field and concave surface deformation. Thus structured targets are suggested to optimize ion beam characteristics, and their improvement and core heating enhancement by ion beams are confirmed.