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
Brillouin amplification inertial confinement fusion ion-acoustic waves quasimode stimulated Brillouin scattering
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.