High gain target design and optimization of implosion trajectory for stable implosion

提出了一种新的快速点火方案，即压缩的DT主燃料通过另一部分单独内爆的DT燃料的撞击碰撞而点燃，该DT燃料在空心圆锥靶中加速到10^8 cm/sec量级的超高速。其动能在与主燃料碰撞时直接转化为对应于> 5 keV温度的热能，并且该自加热部分起到点火器的作用。一个初步的二维辐射流体动力学模拟显示大量的加热的压缩核心，从而新方案的可行性。高能量耦合效率，不需要PW激光器，和负担得起的调查，在实验室相当完善的物理理解和实验知识-这些被认为是本方案的显着优势。

A new scheme for fast ignition is proposed, in which the compressed DT main fuel is ignited by impact collision of another fraction of separately imploded DT fuel, which is accelerated in the hollow conical target to hyper-velocities in the order of 10^8 cm/sec. Its kinetic energy is directly converted into thermal energy corresponding to temperatures > 5 keV on the collision with the main fuel, and this self-heated portion plays the role of igniter. A preliminary two-dimensional radiation-hydrodynamic simulation shows substantial heating of the compressed core and thus the feasibility of the new scheme. High energy coupling efficiency, no need for a PW laser, and affordability of investigation in laboratories under rather well established physical understanding and experimental know-how - those are considered to be the notable advantages of the present scheme.