Implosion Hydrodynamics of Fast Ignition Targets
Implosion Hydrodynamics of Fast Ignition Targets
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DOI：
10.1063/1.1896952
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发表时间：
2005-05
影响因子：
2.2
通讯作者：
R. Stephens;S. Hatchett;M. Tabak;C. Stoeckl;H. Shiraga;S. Fujioka;M. Bonino;A. Nikroo;R. Petrasso-R
中科院分区：
文献类型：
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作者：
R. Stephens;S. Hatchett;M. Tabak;C. Stoeckl;H. Shiraga;S. Fujioka;M. Bonino;A. Nikroo;R. Petrasso-R
快速点火（FI）概念要求产生一个紧凑的，致密的，纯燃料质量可访问的外部点火源。目前的基线FI目标是一个装有延伸到其中心附近的凹锥的壳体。传统的直接或间接驱动会使锥尖附近的壳层塌陷，然后聚焦到锥尖内部的超强激光脉冲会产生高能电子来点燃致密燃料。进行了理论和实验研究的崩溃，这样的目标，验证建模，并探索权衡可用，在这样一个不对称的几何形状，以优化压实的燃料和保持完整的锥体。崩溃是复杂的。远离圆锥体的地方，壳层就像传统的内爆一样坍缩，产生一个热的、低密度的内核。但由于开口的一面，热等离子体朝锥体的尖端排出。这种热等离子体有利于内爆诊断;它可以提供质子…
The fast ignition (FI) concept requires the generation of a compact, dense, pure fuel mass accessible to an external ignition source. The current base line FI target is a shell fitted with a reentrant cone extending to near its center. Conventional direct- or indirect-drive collapses the shell near the tip of the cone and then an ultraintense laser pulse focused to the inside cone tip generates high-energy electrons to ignite the dense fuel. A theoretical and experimental investigation was undertaken of the collapse of such targets, validating modeling, and exploring the trade-offs available, in such an asymmetric geometry, to optimize compaction of the fuel and maintain the integrity of the cone. The collapse is complex. Away from the cone, the shell collapses much as does a conventional implosion, generating a hot, low-density inner core. But because of the open side, hot plasma exhausts out toward the tip of the cone. This hot plasma is advantageous for implosion diagnostics; it can provide protons for...