Effects of Electron-Ion Collisions on Stimulated Raman Backward Scattering Under Different Electron Densities

• Published in: Plasma science & technology Vol. 13; no. 1; pp. 40 - 43
• Main Author: 项江 刘占军 郑春阳
• Format: Journal Article
• Language: English
• Published: IOP Publishing 01.02.2011
• Subjects: 受激拉曼散射; 后向散射; 数值模拟; 电子密度; 碰撞阻尼; 离子碰撞; 等离子体; 线性理论
• ISSN: 1009-0630
• DOI: 10.1088/1009-0630/13/1/09

Effect of electron-ion collision on stimulated Raman backward scattering （SRBS） spectrum are investigated by numerical simulations. In the given parameters and plasma condition, the growth rates of SRBS are found to strongly depend on the electron density, and the gap in the SRBS spectrum corresponding to the high electron density could be explained by the collisional damping. In the low density region, a much higher Landau damping estimated by the linear theory makes the collisional damping negligible. However, the present results show that, collisions play a even more important role than known in the linear theory.