Competition between stimulated Raman scattering and two-plasmon decay in inhomogeneous plasma
Competition between stimulated Raman scattering and two-plasmon decay in inhomogeneous plasma
复制标题
非均匀等离子体中受激拉曼散射与双等离子体衰变之间的竞争
DOI：
10.1063/1.4941969
复制
发表时间：
2016-02
影响因子：
2.2
通讯作者：
X T He
中科院分区：
文献类型：
--
作者：
C Z Xiao;Z J Liu;C Y Zheng;X T He
利用线性对流增益分析和二维粒子模拟方法，研究了非均匀近四分之一临界密度等离子体中激光偏振面内受激拉曼散射（SRS）和双等离子体衰减（TPD）之间的竞争.线性理论分析表明，对流SRS比绝对SRS发生在更宽、更低密度的区域，并且与对流TPD有共同的发生区域。这种对流受激喇曼散射的参数空间的激光强度大于1015 W/cm ~ 2，密度尺度长度约为几百微米，这在大规模直接驱动方案、激波点火方案和混合驱动方案中是常见的。在这些参数区域下的对流性质和饱和机制被确定为朗缪尔衰变不稳定性和强泵耗尽。这种对流SRS的重要性在我们的二维PIC模拟中显示，热电子通过抑制电子散射而减少。
We demonstrate competitions between stimulated Raman scattering (SRS) and two-plasmon decay (TPD) in the laser polarization plane in inhomogeneous near quarter-critical density plasma by using linear convective gain analysis and two-dimensional (2D) particle-in-cell (PIC) simulations. Linear theoretical analysis implies that convective SRS occurs in a wider and lower density region than absolute SRS and has a shared occurrence region with convective TPD. This convective SRS prefers a parameter space with the laser intensity larger than the order of 1015 W/cm2 and the density scale length about several hundreds microns, which may be common in large scale direct-drive scheme, shock ignition scheme, and hybrid-drive scheme. A convective nature and saturation mechanism under these parameter regions are identified to be Langmuir decay instability and strong pump depletion. The significance of this convective SRS is shown in our 2D PIC simulations that hot electrons are reduced through suppressing the electron ...
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影响因子：
2.2
作者：
J. Bergman;B. Eliasson
通讯作者：
J. Bergman;B. Eliasson
影响因子：
2.2
作者：
C. Labaune;H. Baldis;B. Bauer;V. Tikhonchuk;G. Laval
通讯作者：
C. Labaune;H. Baldis;B. Bauer;V. Tikhonchuk;G. Laval
影响因子：
4.8
作者：
S. Weber;C. Riconda
通讯作者：
S. Weber;C. Riconda
DOI：
10.1007/978-1-4615-7332-6_33
发表时间：
1984
期刊：
--
影响因子：
--
作者：
C. Max;E. Campbell;W. Mead;W. Kruer;D. Phillion;R. Turner;B. Lasinski;K. Estabrook
通讯作者：
C. Max;E. Campbell;W. Mead;W. Kruer;D. Phillion;R. Turner;B. Lasinski;K. Estabrook
影响因子：
8.6
作者：
W. Seka;J. Myatt;R. Short;D. Froula;J. Katz;V. Goncharov;I. Igumenshchev
通讯作者：
W. Seka;J. Myatt;R. Short;D. Froula;J. Katz;V. Goncharov;I. Igumenshchev