Author Affiliations
Abstract
1 Institute of Applied Physics and Computational Mathematics, Beijing 100094, China
2 HEDPS, Center for Applied Physics and Technology, Peking University, Beijing 100871, China
3 Collaborative Innovation Center of IFSA (CICIFSA), Shanghai Jiao Tong University, Shanghai 200240, China
The strong-coupling mode, called the “quasimode”, is excited by stimulated Brillouin scattering (SBS) in high-intensity laser–plasma interactions. Also SBS of the quasimode competes with SBS of the fast mode (or slow mode) in multi-ion species plasmas, thus leading to a low-frequency burst behavior of SBS reflectivity. Competition between the quasimode and the ion-acoustic wave (IAW) is an important saturation mechanism of SBS in high-intensity laser–plasma interactions. These results give a clear explanation of the low-frequency periodic burst behavior of SBS and should be considered as a saturation mechanism of SBS in high-intensity laser–plasma interactions.
Brillouin amplification inertial confinement fusion ion-acoustic waves quasimode stimulated Brillouin scattering High Power Laser Science and Engineering
2019, 7(4): 04000e58
1 中国科学技术大学近代物理系,安徽,合肥,230027
2 中国工程物理研究院高温高密度等离子体物理国家重点实验室,四川,绵阳,621900
以离子温度与电子温度之比为参数,将等离子体介电函数作展开,由此解析地求解了双离子成分等离子体的离子声快、慢波模的色散关系。与现有的其它解析理论相比较,所得到的解析公式更加准确。
双离子成份等离子体 离子声波 色散关系 two-species plasmas ion-acoustic waves dispersion relation
