Measuring the principal Hugoniot of inertial-confinement-fusion-relevant TMPTA plastic foams.

Measuring the principal Hugoniot of inertial-confinement-fusion-relevant TMPTA plastic foams.
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测量与惯性约束聚变相关的 TMPTA 塑料泡沫的主 Hugoniot。

DOI:
10.1103/physreve.107.025206
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发表时间:
2023
期刊:
Physical review. E
影响因子:
--
通讯作者:
Paddock RW
Paddock RW
中科院分区:
--
文献类型:
--
作者:
Paddock RW

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润湿泡沫层对于惯性约束聚变胶囊具有重要意义,因为它们可以控制内爆的收敛比,并有机会最大限度地减少流体动力学不稳定性的增长。然而,与融合相关的泡沫的状态方程尚未得到很好的表征,许多模拟依赖于将此类泡沫建模为具有泡沫平均密度的均匀介质。为了解决这个问题,在中央激光设施中使用 VULCAN Nd:glass 激光器进行了一项实验。目的是测量 TMPTA 塑料泡沫的主要 Hugoniot,对应于液体 DT 润湿泡沫层及其“流体动力学等效”胶囊的密度。 VISAR 用于获得泡沫和石英参考层的冲击速度,而条纹光学高温测量提供了冲击材料的温度。测量结果证实,对于 20-120 GPa 的压力范围,这种材料确实可以使用泡沫密度下均匀介质的状态方程来很好地描述。
Wetted-foam layers are of significant interest for inertial-confinement-fusion capsules, due to the control they provide over the convergence ratio of the implosion and the opportunity this affords to minimize hydrodynamic instability growth. However, the equation of state for fusion-relevant foams are not well characterized, and many simulations rely on modeling such foams as a homogeneous medium with the foam average density. To address this issue, an experiment was performed using the VULCAN Nd:glass laser at the Central Laser Facility. The aim was to measure the principal Hugoniot of TMPTA plastic foams at, corresponding to the density of liquid DT-wetted-foam layers, and their “hydrodynamic equivalent” capsules. A VISAR was used to obtain the shock velocity of both the foam and an-quartz reference layer, while streaked optical pyrometry provided the temperature of the shocked material. The measurements confirm that, for the 20–120 GPa pressure range accessed, this material can indeed be well described using the equation of state of the homogeneous medium at the foam density.
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