Review of hydrodynamic instability experiments in inertially confined fusion implosions on National Ignition Facility
Review of hydrodynamic instability experiments in inertially confined fusion implosions on National Ignition Facility
复制标题
国家点火装置惯性约束聚变内爆流体动力学不稳定性实验综述
DOI：
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发表时间：
2019
影响因子：
2.2
通讯作者：
M. Stadermann
中科院分区：
文献类型：
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作者：
V. Smalyuk;C. Weber;O. Landen;Samim Ali;B. Bachmann;P. Celliers;E. Dewald;A. Fernandez;B. Hammel;G. Hall;A. MacPhee;L. Pickworth;H. Robey;N. Alfonso;K. Baker;L. B. Hopkins;L. Carlson;D. Casey;D. Clark;J. Crippen;L. Divol;T. Döppner;M. Edwards;M. Farrell;S. Felker;J. Field;S. Haan;A. Hamza;M. Havre;M. Herrmann;W. Hsing;S. Khan;J. Kline;J. Kroll;S. Lepape;E. Loomis;B. MacGowan;D. Martinez;L. Masse;M. Mauldin;J. Milovich;A. Moore;A. Nikroo;A. Pak;P. Patel;J. Peterson;K. Raman;B. Remington;N. Rice;M. Schoff;M. Stadermann
流体动力学不稳定性是影响惯性约束聚变（ICF）内爆性能退化的主要因素。在国家点火装置上进行的最高性能内爆中，由于α粒子加热产生的产额放大（YA）接近103，而点火需要105 -30的YA。了解和减轻不稳定性是实现点火的关键。本文综述了几个实验平台，已开发的直接测量这些不稳定性的ICF内爆的所有阶段。在OMEGA激光器上对波纹激波传播的测量提供了三种烧蚀体--塑料（CH）、铍和高密度碳中不稳定性的初始种子的结果。在烧蚀前沿，使用流体动力学生长射线照相平台在线性区域测量了预先施加的调制的不稳定性生长。该平台被扩展用于“原生粗糙度”调制和工程特征（填充管和胶囊支撑膜或“帐篷”）的调制生长。几个新的实验平台已经或正在开发中，以测量不稳定性增长的消融冰界面。在内爆的减速阶段，互补的“自发射”和“自背光”平台被开发来测量低模式的不对称性和高模式扰动附近的峰值压缩。
Hydrodynamic instabilities are a major factor in degradation of inertial confinement fusion (ICF) implosions. In the highest performing implosions on National Ignition Facility, yield amplification (YA) due to alpha particle heating approached ∼3, while YA of ∼15–30 is needed for ignition. Understanding and mitigation of the instabilities are critical to achieving ignition. This article reviews several experimental platforms that have been developed to directly measure these instabilities in all phases of ICF implosions. Measurements of ripple-shock propagation at OMEGA laser has provided results on initial seeds for the instabilities in three ablators—plastic (CH), beryllium, and high-density carbon. At the ablation front, instability growth of pre-imposed modulations was measured in the linear regime using the hydrodynamic growth radiography platform. This platform was extended for modulation growth of ‘native roughness’ modulations and engineering features (fill tubes and capsule support membranes or ‘tents’). Several new experimental platforms have or are being developed to measure instability growth at the ablator–ice interface. In the deceleration phase of implosions, complementary ‘self-emission’ and ‘self-backlighting’ platforms were developed to measure low-mode asymmetries and high-mode perturbations near peak compression.