High Power Laser Science and Engineering, 2019, 7 (4): 04000e58, Published Online: Nov. 6, 2019  

Burst behavior due to the quasimode excited by stimulated Brillouin scattering in high-intensity laser–plasma interactions Download: 645次

Q. S. Feng 1L. H. Cao 1,2,3Z. J. Liu 1,2C. Y. Zheng 1,2,3,†X. T. He 1,2,3
Author Affiliations
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
Abstract
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.

Q. S. Feng, L. H. Cao, Z. J. Liu, C. Y. Zheng, X. T. He. Burst behavior due to the quasimode excited by stimulated Brillouin scattering in high-intensity laser–plasma interactions[J]. High Power Laser Science and Engineering, 2019, 7(4): 04000e58.

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