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Hybrid target design for imprint mitigation in direct-drive inertial confinement fusion.
Physical Review E ( IF 2.4 ) Pub Date : 2020-06-30 , DOI: 10.1103/physreve.101.063207
L Ceurvorst 1 , R Betti 2 , A Casner 1 , V Gopalaswamy 2 , A Bose 2 , S X Hu 2 , E M Campbell 2 , S P Regan 2 , C A McCoy 3 , M Karasik 4 , J Peebles 2 , M Tabak 5 , W Theobald 2
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A target design for mitigating the Rayleigh-Taylor instability is proposed for use in high energy density and direct-drive inertial confinement fusion experiments. In this scheme, a thin gold membrane is offset from the main target by several-hundred microns. A strong picket on the drive beams is incident upon this membrane to produce x rays which generate the initial shock through the target. The main drive follows shortly thereafter, passing through the ablated shell and directly driving the main target. The efficacy of this scheme is demonstrated through experiments performed at the OMEGA EP facility, showing a reduction of the Rayleigh-Taylor instability growth which scales exponentially with frequency, suppressing development by at least a factor of 5 for all wavelengths below 100 μm. This results in a delay in the time of target perforation by 40%.

中文翻译:

混合目标设计,可减轻直接驱动惯性约束融合中的压印。

提出了一种减轻瑞利-泰勒不稳定性的目标设计,用于高能量密度和直接驱动惯性约束聚变实验。在该方案中,金薄膜与主要靶材之间的偏移量为几百微米。驱动梁上的强力纠察器入射到该膜上,以产生X射线,从而产生穿过目标的初始冲击。此后不久,主驱动器跟随,穿过烧蚀的外壳并直接驱动主目标。通过在OMEGA EP设施上进行的实验证明了该方案的有效性,结果表明,瑞利-泰勒不稳定性增长的降低与频率成指数关系,对于所有低于100的波长,其发展抑制至少5倍。μ。这导致目标穿孔时间延迟40
更新日期:2020-06-30
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