Assessing Stagnation Conditions and Identifying Trends in Magnetized Liner Inertial Fusion
Assessing Stagnation Conditions and Identifying Trends in Magnetized Liner Inertial Fusion
复制标题
评估磁化线性惯性聚变的停滞条件并识别趋势
DOI：
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发表时间：
2019
影响因子：
1.5
通讯作者：
D. Sinars
中科院分区：
文献类型：
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作者：
M. Gomez;S. Slutz;P. Knapp;K. Hahn;M. Weis;E. Harding;M. Geissel;J. Fein;M. Glinsky;S. Hansen;A. Harvey;C. Jennings;I. Smith;D. Woodbury;D. Ampleford;T. Awe;G. Chandler;M. Hess;D. Lamppa;C. Myers;C. Ruiz;A. Sefkow;J. Schwarz;D. Yager;B. Jones;J. Porter;K. Peterson;R. Mcbride;G. Rochau;D. Sinars
磁化直线惯性聚变（MagLIF）是一种磁惯性聚变概念，目前正在Z脉冲功率装置上进行研究。该概念利用轴向磁场和激光加热来产生与聚变相关的停滞条件，尽管峰值磁驱动内爆速度小于100 km/s。最初的mymargin实验证明了这一概念的可行性，但留下了关于耦合到燃料的激光能量的数量以及混合物在停滞条件下所起作用的悬而未决的问题。本文提出了估算与燃料耦合的激光能量和确定滞止压力和混合的简单方法。这些工具可以在许多实验中进行比较，以确定性能趋势，并可以与2-D磁流体动力学模拟进行比较。最初的实验受到低激光能量耦合（0.2-0.6 kJ）的影响，这导致中子产额降低（1-<inline-formula><tex-math notation="LaTeX">2美元 imes 10^{12}$</tex-math></inline-formula>）。此外，所有早期的实验都使用了中Z（铝）面向燃料的部件。这些成分的混合对停滞有显著影响，并随着激光能量的增加而增加。较低的中子产额（1-<inline-formula><tex-math notation="LaTeX">3美元 在</tex-math></inline-formula>较高的激光耦合（0.8-1.2 kJ）下测量，这与预测的比例显著偏离。当所有面向燃料的部件都由低Z材料（铍）制成时，中子产量增加（<inline-formula><tex-math notation="LaTeX">3.2美元 imes 10^{12}$</tex-math></inline-formula>），并按预期的激光能量进行缩放;实验产率约为模拟产率的40%。此外，在负载电流从16-18 MA变化的实验中观察到大约I<sup>4的</sup>产额缩放。这些结果是第一步的实验演示的停滞性能缩放与输入参数的MagLIF。
Magnetized Liner Inertial Fusion (MagLIF) is a magneto-inertial fusion concept, which is presently being studied on the Z Pulsed Power Facility. The concept utilizes an axial magnetic field and laser heating to produce fusion-relevant conditions at stagnation despite a peak magnetically driven implosion velocity of less than 100 km/s. Initial mymargin experiments demonstrated the viability of the concept but left open questions about the amount of laser energy coupled to the fuel and the role that mix played in the stagnation conditions. In this paper, simple methodologies for estimating the laser energy coupled to the fuel and determining the stagnation pressure and mix are presented. These tools enabled comparisons across many experiments to establish performance trends, as well as allow comparisons with 2-D magnetohydrodynamics simulations. The initial experiments were affected by low laser energy coupling (0.2–0.6 kJ), which resulted in reduced neutron yields (1–<inline-formula> <tex-math notation="LaTeX">$2 imes 10^{12}$ </tex-math></inline-formula>). In addition, all early experiments utilized mid-Z (aluminum) fuel-facing components. Mixing from these components had a significant impact on stagnation and increased with laser energy. Lower neutron yields (1–<inline-formula> <tex-math notation="LaTeX">$3 imes 10^{11}$ </tex-math></inline-formula>) were measured with higher laser coupling (0.8–1.2 kJ), which significantly deviated from the predicted scaling. When all fuel-facing components were made from a low-Z material (beryllium), neutron production increased (<inline-formula> <tex-math notation="LaTeX">$3.2 imes 10^{12}$ </tex-math></inline-formula>) and scaled as expected with laser energy; experimental yields were approximately 40% of simulated yields. In addition, roughly I<sup>4</sup> yield scaling was observed in experiments, where the load current was varied from 16–18 MA. These results represent the first step in experimental demonstration of stagnation performance scaling with input parameters in MagLIF.
混合对磁化线性惯性聚变靶性能的起源和影响
影响因子：
2.2
作者：
Knapp, P. F.;Gomez, M. R.;Hansen, S. B.;Glinsky, M. E.;Jennings, C. A.;Slutz, S. A.;Harding, E. C.;Hahn, K. D.;Weis, M. R.;Evans, M.
通讯作者：
Evans, M.