Temperature dependence of parametric instabilities in the context of the shock-ignition approach to inertial confinement fusion
Temperature dependence of parametric instabilities in the context of the shock-ignition approach to inertial confinement fusion
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DOI：
10.1017/hpl.2014.50
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发表时间：
2015
影响因子：
4.8
通讯作者：
S. Weber;C. Riconda
中科院分区：
文献类型：
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作者：
S. Weber;C. Riconda
从受激布里渊散射、受激拉曼散射、双等离子体衰变(TPD)、朗缪尔衰变不稳定性(LDI)和空化等主要参数过程出发，分析了日冕电子等离子体温度在激波点火条件下的作用。TPD不稳定性和空化对电子温度非常敏感。同时，反射率和高能电子的产生也受到了强烈的影响。对于较低的等离子体温度，LDI对TPD饱和起主导作用。在激波点火的背景下理解激光与等离子体的相互作用是一个重要的问题，因为集体效应和热电子产生的能量沉积是局部化的。这反过来会对压缩阶段和由此产生的内爆阶段的增益系数产生影响。
The role of the coronal electron plasma temperature for shock-ignition conditions is analysed with respect to the dominant parametric processes: stimulated Brillouin scattering, stimulated Raman scattering, two-plasmon decay (TPD), Langmuir decay instability (LDI) and cavitation. TPD instability and cavitation are sensitive to the electron temperature. At the same time the reflectivity and high-energy electron production are strongly affected. For low plasma temperatures the LDI plays a dominant role in the TPD saturation. An understanding of laser–plasma interaction in the context of shock ignition is an important issue due to the localization of energy deposition by collective effects and hot electron production. This in turn can have consequences for the compression phase and the resulting gain factor of the implosion phase.