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首页> 外文期刊>Plasma physics and controlled fusion >Effect of bromine-dopant on radiation-driven Rayleigh-Taylor instability in plastic foil
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Effect of bromine-dopant on radiation-driven Rayleigh-Taylor instability in plastic foil

机译：溴 - 掺杂对塑料箔辐射驱动瑞利 - 泰勒不稳定性的影响

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摘要

Effects of bromine (Br) dopant on the growth of radiation-driven ablative Rayleigh-Taylor instability (RTI) in plastic foils are studied by radiation hydrodynamics simulations and theoretical analysis. It is found that the Br-dopant in plastic foil reduces the seed of ablative RTI. The main reasons of the reduction are attributed to the smaller oscillation amplitude of ablative Richtmyer-Meshkov instability (RMI) induced by the smaller post-shock sound speed, and the smaller oscillation frequency of ablative RMI induced by the smaller ablation velocity and blow-off plasma velocity. The Br-dopant also decreases the linear growth rate of ablative RTI due to the smaller acceleration. Treating the perturbation growth as a function of foil's displacement, the perturbation growth would increase in Br-doped foil at the phase of ablative RTI, which is attributed to the decrease of the ablation velocity and the density gradient scale length. The results are helpful for further understanding the influence of high-Z dopant on the radiation-driven ablative RTI.
机译：通过辐射流体动力学模拟研究了溴（BR）掺杂对塑料箔中辐射驱动的雷利泰勒不稳定性（Rti）的影响及其理论分析。发现塑料箔中的BR掺杂剂减少了烧蚀的种子。减少的主要原因归因于由较小的震动后声速速度引起的亮度Richtmyer-Meshkov不稳定性（RMI）的较小振荡幅度，以及通过较小的消融速度和吹扫诱导的烧蚀RMI的较小振荡频率等离子体速度。由于较小的加速度，Br掺杂剂还降低了烧蚀的线性生长速率。治疗作为箔位移的函数的扰动生长，扰动生长将在烧蚀的相位处的BR掺杂的箔增加，这归因于消融速度的降低和密度梯度长度。结果有助于进一步了解高Z掺杂剂对辐射驱动的烧蚀RTI的影响。

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