Simulation and design study of cryogenic cone shell target for Fast Ignition Realization Experiment project
Simulation and design study of cryogenic cone shell target for Fast Ignition Realization Experiment project
复制标题
DOI：
10.1063/1.2671124
复制
发表时间：
2007-03
影响因子：
2.2
通讯作者：
H. Nagatomo;T. Johzaki;Tatsufumi Nakamura;H. Sakagami;A. Sunahara;K. Mima
中科院分区：
文献类型：
--
作者：
H. Nagatomo;T. Johzaki;Tatsufumi Nakamura;H. Sakagami;A. Sunahara;K. Mima
在快点火方案中，首先利用内爆激光器产生高密度燃料堆芯等离子体，然后利用拍瓦激光器加热堆芯等离子体，实现聚变燃烧。高密度燃料堆芯等离子体的形成是FI的关键问题之一。FI的典型靶是一个装有凹形金锥的壳体，用于加热激光。金锥烧蚀等离子体对内爆动力学的干扰，与传统的中心热点方法有很大不同。因此，必须控制非球形内爆的动力学，以组装高密度和高面密度的材料。对锥导引内爆的辐射流体动力学进行了数值模拟研究。在计算结果中，阐明了锥对内爆动力学的影响。锥表面受到辐射的照射，烧蚀等离子体影响内爆壳。在锥体上涂敷一层金属膜，对金等离子体进行了夯实，对提高内爆性能是有效的。
In the fast ignition (FI) scheme, at first, high-density fuel core plasma is assembled by implosion laser, and is then heated by petawatt laser to achieve a fusion burning condition. The formation of high-density fuel core plasma is one of the key issues for FI. A typical target for FI is a shell fitted with a reentrant gold cone to make a pass for heating laser. The ablated plasma of gold cone interferes with the implosion dynamics, which is quite different from that of the conventional central-hot-spot approach. Therefore, the dynamics of a nonspherical implosion must be controlled to assemble high density and high areal density. Numerical simulations are performed to study radiation hydrodynamics of cone-guided implosions. In the results, the effect of the cone on implosion dynamics is clarified. The cone surface is irradiated by the radiation and ablated plasma affects the imploding shell. Coating on the cone, which tamps the gold plasma, is effective to improve the implosion performance, although the...