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，即压缩后的DT主燃料与另一部分单独内爆的DT燃料撞击点火，使其在中空圆锥靶中加速到10 8 cm/s量级的超高速。它的动能在与主燃料碰撞时直接转化为与温度&5keV对应的热能，而这个自热部分起着点火器的作用。初步的二维辐射-流体力学模拟表明，压缩堆芯有很大的加热，因此新方案是可行的。能量耦合效率高，不需要PW激光器，以及在对物理和实验技术有较好了解的情况下，实验室可以负担得起研究--这些被认为是本方案的显著优点。

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.