Symmetry tuning of a near one-dimensional 2-shock platform for code validation at the National Ignition Facility
Symmetry tuning of a near one-dimensional 2-shock platform for code validation at the National Ignition Facility
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DOI：
10.1063/1.4947223
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发表时间：
2016-04-01
影响因子：
2.2
通讯作者：
Tipton, R. E.
中科院分区：
文献类型：
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作者：
Khan, S. F.;MacLaren, S. A.;Tipton, R. E.
我们介绍了一个新的准一维内爆实验平台，在国家点火装置设计验证物理模型，以及研究各种惯性约束聚变方面，如内爆对称性，收敛，流体动力学不稳定性，和冲击定时。该平台已被开发用于在整个压缩阶段保持壳体球形，并在停滞时产生圆形热芯。该平台采用了一个2冲击1MJ脉冲与340 TW的峰值功率在近真空Au空腔和CH烧蚀胶囊均匀掺杂1%的Si。我们已经进行了几个飞行中的射线照相术，对称胶囊，和冲击计时实验，以调整胶囊的对称性，近圆在几个时期的内爆。调整光束的内锥和外锥的相对功率使我们能够控制胶囊的极和赤道处的驱动，从而提供实现球形胶囊会聚的机制。调谐实验的细节和结果进行了描述。出版社：AIP Publishing
We introduce a new quasi 1-D implosion experimental platform at the National Ignition Facility designed to validate physics models as well as to study various Inertial Confinement Fusion aspects such as implosion symmetry, convergence, hydrodynamic instabilities, and shock timing. The platform has been developed to maintain shell sphericity throughout the compression phase and produce a round hot core at stagnation. This platform utilizes a 2-shock 1MJ pulse with 340 TW peak power in a near-vacuum Au Hohlraum and a CH ablator capsule uniformly doped with 1% Si. We have performed several inflight radiography, symmetry capsule, and shock timing experiments in order to tune the symmetry of the capsule to near round throughout several epochs of the implosion. Adjusting the relative powers of the inner and outer cones of beams has allowed us to control the drive at the poles and equator of the capsule, thus providing the mechanism to achieve a spherical capsule convergence. Details and results of the tuning experiments are described. Published by AIP Publishing.