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arXiv 1105.5495physics.plasm-ph
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用从头算多相DT状态方程研究惯性约束聚变内爆的变化

On the change in Inertial Confinement Fusion Implosions upon using an ab initio multiphase DT equation of state

Laurent Caillabet, Benoit Canaud, Gwenaël Salin, Stéphane Mazevet, Paul Loubeyre

摘要:

改进氘-氚(DT)的状态方程(EoS)的描述最近已经显示出显著改变惯性约束聚变(ICF)靶的增益(Hu等人,PRL 104,235003(2010))。在这里,我们使用先进的多相状态方程(EoS),从头计算的基础上,从19 K开始在DT冰中进行流体动力学模拟的激光脉冲形状的全面优化。热核增益被证明是一个强大的估计超过可能的不确定性的EOS。两种不同的目标设计进行了讨论,冲击点火和自燃。在第一种情况下,通过稍微增加激光能量,可以恢复面密度和热核能量。在第二种情况下,需要一个较低的飞行时间,导致显着的延迟(3 ns)的冲击定时的内爆。

英文摘要:

Improving the description of the equation of state (EoS) of deuterium-tritium (DT) has recently been shown to change significantly the gain of an Inertial Confinement Fusion (ICF) target (Hu et al., PRL 104, 235003 (2010)). We use here an advanced multi-phase equation of state (EoS), based on ab initio calculations, to perform a full optimization of the laser pulse shape with hydrodynamic simulations starting from 19 K in DT ice. The thermonuclear gain is shown to be a robust estimate over possible uncertainties of the EoS. Two different target designs are discussed, for shock ignition and self-ignition. In the first case, the areal density and thermonuclear energy can be recovered by slightly increasing the laser energy. In the second case, a lower in-flight adiabat is needed, leading to a significant delay (3ns) in the shock timing of the implosion.

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