Controlling stimulated Raman scattering by two-color light in inertial confinement fusion
Controlling stimulated Raman scattering by two-color light in inertial confinement fusion
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DOI：
10.1063/1.4995474
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发表时间：
2017-07
影响因子：
2.2
通讯作者：
Zhimin Liu;Y. H. Chen;C. Zheng;Lihua Cao;Bin Li;J. Xiang;L. Hao;K. Lan
中科院分区：
文献类型：
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作者：
Zhimin Liu;Y. H. Chen;C. Zheng;Lihua Cao;Bin Li;J. Xiang;L. Hao;K. Lan
提出了一种利用辅助2ω光抑制3ω光的受激拉曼散射来控制惯性约束聚变中受激拉曼散射的方法。在该方案中，2ω光的逆韧致辐射吸收和参数不稳定性增加了电子温度和等离子体密度涨落，从而阻止了3ω光的拉曼散射的发展。该方案在一维动力学模拟和二维辐射流体力学模拟中都得到了成功的验证。一维Vlasov结果表明，在一定条件下，3ω光的时间平均透过率从0.75提高到0.95。用蒙特卡罗碰撞的格子粒子方法计算的结果表明，随着2ω光强的增加，电子温度显著升高。二维辐射流体力学模拟结果表明，电子温度从3.2keV增加到3.5keV.
A method is proposed to control the stimulated Raman scattering in the inertial confinement fusion by using auxiliary 2ω light to suppress the stimulated Raman scattering of the 3ω light. In this scheme, inverse bremsstrahlung absorption and parametric instabilities in the 2ω light increase the electron temperature and the plasma-density fluctuation, thus preventing the development of Raman scattering of the 3ω light. This scheme is successfully demonstrated by both one-dimensional kinetic simulations and two-dimensional radiative hydrodynamic simulations. The one-dimensional Vlasov results show that the time-averaged transmissivity of the 3ω light increases from 0.75 to 0.95 under certain conditions. Results obtained using the particle-in-cell method with Monte Carlo collisions show that the electron temperature is greatly increased with the increasing intensity of the 2ω light. The two-dimensional radiative hydrodynamic simulation results show that the electron temperature increases from 3.2 keV to 3.5 ...