Observation of Hydrodynamic Flows in Imploding Fusion Plasmas on the National Ignition Facility.
Observation of Hydrodynamic Flows in Imploding Fusion Plasmas on the National Ignition Facility.
复制标题
国家点火装置内爆聚变等离子体中水动力流动的观测。
DOI：
10.1103/physrevlett.127.125001
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发表时间：
2021
影响因子：
8.6
通讯作者：
C. Young
中科院分区：
文献类型：
--
作者：
D. Schlossberg;G. Grim;D. Casey;A. Moore;R. Nora;B. Bachmann;L. Benedetti;R. Bionta;M. Eckart;J. Field;D. Fittinghoff;M. Gatu Johnson;V. Geppert;E. Hartouni;R. Hatarik;W. Hsing;L. Jarrott;S. F. Khan;J. Kilkenny;O. Landen;B. MacGowan;A. Mackinnon;K. Meaney;D. Munro;S. Nagel;A. Pak;P. Patel;B. Spears;P. Volegov;C. Young
惯性约束聚变内爆被设计成在峰值压缩时具有最小的流体运动，通常在实验室中显示出显著的线性流动，这可归因于根据模拟的激光驱动照明对称性中的不平衡水平。我们提出的实验结果，故意改变模式1驱动器的不平衡高达4%，以测试流体动力学预测的流量和由此产生的内爆核心的不对称性和性能，DT中子能谱和高分辨率X射线核心成像的组合测量。中子产率下降了50%，各向异性中子多普勒展宽增加了20%，与模拟一致。此外，示踪剂射流从胶囊填充管扰动，夹带的热点流证实了从中子能谱推导出的平均流速。
Inertial confinement fusion implosions designed to have minimal fluid motion at peak compression often show significant linear flows in the laboratory, attributable per simulations to percent-level imbalances in the laser drive illumination symmetry. We present experimental results which intentionally varied the mode 1 drive imbalance by up to 4% to test hydrodynamic predictions of flows and the resultant imploded core asymmetries and performance, as measured by a combination of DT neutron spectroscopy and high-resolution x-ray core imaging. Neutron yields decrease by up to 50%, and anisotropic neutron Doppler broadening increases by 20%, in agreement with simulations. Furthermore, a tracer jet from the capsule fill-tube perturbation that is entrained by the hot-spot flow confirms the average flow speeds deduced from neutron spectroscopy.
惯性约束聚变中不对称性对燃料性能的影响
影响因子：
2.4
作者：
Gatu Johnson M
通讯作者：
Gatu Johnson M