Innovative ignition scheme for ICF - impact fast ignition
Innovative ignition scheme for ICF - impact fast ignition
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DOI：
10.1088/0029-5515/46/1/011
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发表时间：
2006-01-01
期刊：
影响因子：
3.3
通讯作者：
Eliezer, S
中科院分区：
文献类型：
--
作者：
Murakami, M;Nagatomo, H;Eliezer, S
提出了一种新的点火方案，即压缩DT主燃料与另一部分单独内爆的DT燃料碰撞点火，DT燃料在空心圆锥靶中加速到约（1-2）× 10（8）CM·s（-1）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的温度的热能，并且该自加热部分起到点火器的作用。点火器外壳通常用纳秒脉冲照射，其强度远超过10（15）W cm（-2），激光波长为0.25 μ m，以施加150-300 Mbar的烧蚀压力。初步的二维流体动力学模拟表明，大量的3-5千电子伏的影响加热。简单的物理，高增益设计的潜力和低成本-这些是本方案的关键优势。
A new ignition scheme 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 super high velocities of about (1-2) x 10(8) CM s(-1). 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 ignitor. The ignitor shell is irradiated typically by nanosecond pulses at intensities well beyond 10(15) W cm(-2) at such a short laser wavelength as 0.25 mu m to exert ablation pressures of 150-300 Mbar. A preliminary two-dimensional hydrodynamic simulation demonstrates substantial heating of 3-5 keV on the impact. Simple physics, potential for high gain designs and low cost-these are the crucial advantages of the present scheme.