Radiative shocks produced from spherical cryogenic implosions at the National Ignition Facility
Radiative shocks produced from spherical cryogenic implosions at the National Ignition Facility
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DOI：
10.1063/1.4805081
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发表时间：
2013-05
影响因子：
2.2
通讯作者：
A. Pak;L. Divol;G. Gregori;S. Weber;J. Atherton;R. Bennedetti;D. Bradley;D. Callahan;D. Casey;E. Dewald;T. Döppner;M. Edwards;J. Frenje;S. Glenn;G. Grim;D. Hicks;W. Hsing;N. Izumi;O. Jones;Maria Gatu Johnson;S. Khan;J. Kilkenny;J. Kline;G. Kyrala;J. Lindl;O. Landen;S. L. Pape;T. Ma;A. MacPhee;B. MacGowan;A. Mackinnon;L. Masse;N. Meezan;J. Moody;R. Olson;J. Ralph;H. Robey;H. Park;B. Remington;J. Ross;R. Tommasini;R. Town;V. Smalyuk;S. Glenzer;E. Moses
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作者：
A. Pak;L. Divol;G. Gregori;S. Weber;J. Atherton;R. Bennedetti;D. Bradley;D. Callahan;D. Casey;E. Dewald;T. Döppner;M. Edwards;J. Frenje;S. Glenn;G. Grim;D. Hicks;W. Hsing;N. Izumi;O. Jones;Maria Gatu Johnson;S. Khan;J. Kilkenny;J. Kline;G. Kyrala;J. Lindl;O. Landen;S. L. Pape;T. Ma;A. MacPhee;B. MacGowan;A. Mackinnon;L. Masse;N. Meezan;J. Moody;R. Olson;J. Ralph;H. Robey;H. Park;B. Remington;J. Ross;R. Tommasini;R. Town;V. Smalyuk;S. Glenzer;E. Moses
在美国国家点火装置的惯性约束内爆实验中，观测到了球形膨胀的辐射激波。在这些实验中，最初直径为2 mm的球形融合靶通过由靶外表面的烧蚀引起的压力来压缩。在密封舱的峰值压缩时，X射线和核诊断表明形成了一个中心核心，半径和离子温度分别为1.20 μm和1.22 keV。这个中央堆芯被一个较冷的氘氚燃料压缩壳所包围，其外半径为40 μm，密度大于500 g/cm 3。使用来自多个诊断的输入，对于这里讨论的内爆，压缩核心的峰值压力已经被推断为100 Gbar的量级。激波阵面最初位于高压压缩燃料壳与周围低压烧蚀体等离子体的界面处，在达到峰值压缩后开始向外传播。
Spherically expanding radiative shock waves have been observed from inertially confined implosion experiments at the National Ignition Facility. In these experiments, a spherical fusion target, initially 2 mm in diameter, is compressed via the pressure induced from the ablation of the outer target surface. At the peak compression of the capsule, x-ray and nuclear diagnostics indicate the formation of a central core, with a radius and ion temperature of ∼20 μm and ∼ 2 keV, respectively. This central core is surrounded by a cooler compressed shell of deuterium-tritium fuel that has an outer radius of ∼40 μm and a density of >500 g/cm3. Using inputs from multiple diagnostics, the peak pressure of the compressed core has been inferred to be of order 100 Gbar for the implosions discussed here. The shock front, initially located at the interface between the high pressure compressed fuel shell and surrounding in-falling low pressure ablator plasma, begins to propagate outwards after peak compression has been rea...