Compton 散射对线偏光在相对论等离子体中调制不稳定性的影响

核聚变与等离子体物理 ›› 2014, Vol. 34 ›› Issue (3): 214-218.

Compton 散射对线偏光在相对论等离子体中调制不稳定性的影响

高海林，皮小力，郝东山

(1. 河南工业职业技术学院，南阳 473009 ；2. 郑州华信学院信息工程系，新郑 451150)

收稿日期:2013-08-22 修回日期:2014-04-24 出版日期:2014-09-15 发布日期:2014-09-15
作者简介:高海林(1964-) ，男，河南省南阳市人，副教授，从事激光与信号传输研究。
基金资助:
河南省基础与前沿技术研究资助项目(092300410227)

Influences of modulation instability on Compton scattering to linearly polarized laser pulse in relativistic plasma

GAO Hai-lin, PI Xiao-li, HAO Dong-shan

(1. Department of Basic Sciences Education, Henan Polytechnic Institute, Nanyang 473009;2. Department of Information Engineering,Zhengzhou Huaxin University, Xinzheng 451150)

Received:2013-08-22 Revised:2014-04-24 Online:2014-09-15 Published:2014-09-15

摘要/Abstract

摘要：

应用多光子非线性Compton 散射模型、电磁波非线性色散方程和Karpman 方法，研究了 Compton 散射对线偏光在相对论等离子体中调制不稳定性的影响，给出了等离子体的非线性色散、控制和调制不稳定性增长率的修正方程，并进行了数值模拟。结果表明：与散射前相比，随无量纲化频率值减小，即趋于等离子体临界面处，散射使相同扰动波数引起的调制不稳定性增长率更大，使等离子体临界面处的调制不稳定性增长率较其余位置尤为显著。这是由于散射光使等离子体非线性增强，形成了激光场自聚焦和自成丝的缘故。

关键词: 非线性色散方程, 调制不稳定性, 增长率, 耦合, 多光子非线性 Compton 散射

Abstract:

By using the model of multi-photon nonlinear Compton scattering, the nonlinear dispersion relation and Karpman’s model, the influences of the modulation instability on Compton scattering to the linear polarized light in relativistic plasma were studied, the revised equations on the nonlinear dispersion, the control and the growth rate of the modulation instability were given out, and these equations are simulated. The results show that under the same perturbation wave numbers, the even big rate of the modulation instability near the plasma surface are taken place by Compton scattering along with the decreasing of the numbers of the no gauge frequency than before Compton scattering, and the even marked growth rate of the modulation instability near the plasma surface are taken place near the plasma surface than other places. Because the plasma nonlinear is increased by the scattering, the self-focusing and self-turned fine silk are formed.

Key words: Nonlinear dispersion equation, Modulation instability, Growth rate, Coupling, Multi-photon nonlinear Compton scattering

中图分类号:

O431

高海林，皮小力，郝东山. Compton 散射对线偏光在相对论等离子体中调制不稳定性的影响[J]. 核聚变与等离子体物理, 2014, 34(3): 214-218.

GAO Hai-lin, PI Xiao-li, HAO Dong-shan. Influences of modulation instability on Compton scattering to linearly polarized laser pulse in relativistic plasma[J]. NUCLEAR FUSION AND PLASMA PHYSICS, 2014, 34(3): 214-218.

参考文献

[1] Sprangle P, Hafizi B, Peano J R. Laser pulse modulation instabilities in plasma channels[J]. Phys. Rev. E, 2000,61(4): 4381−4393.
[2] Andreev N E, Krisonve V I, Gorbunov I M. Stimulated processes and self-modulation of a short intense laser pulse in the laser wake-field accelerator [J]. Phys.Plasmas, 1995, 2(6): 2573−2582.
[3] Mourou G A, Tajima T, Bulanov S V. Optics in the relativistic regime [J]. Rev.Mod. Phys., 2006, 78(2):309−371.
[4] 王薇, 张杰, Senceha V K. 对激光等离子体中X射线的产生与辐射加热研究[J]. 物理学报, 2002, 51(3): 590−594.
[5] Jha P, Wadhwani N, Raj G, et al. Relativistic and ponderomotive effects on laser plasma interaction dynamics [J]. Phys. Plasmas, 2004, 11(5):1834−1839.
[6] Jha P, Mishra R K, Upadhyay A K, et al. Spot-size evolution of laser beam propagating in plasma embedded in axial magnetic field [J].Phys. Plasmas, 2007, 14:114504.
[7] 高勋, 郭凯敏, 宋晓伟, 等. 激光烧蚀铁靶的等离子体特性[J]. 中国激光, 2010, 37(3): 877−890.
[8] Meier J, Stegeman G I, Christodoulides D N. Experimental observation of discretemodulation instability [J].Phys. Rev. Lett., 2004, 92: 163902.
[9] Jha P, Kumar P, Raj G, Modulation instability of laser pulse in magnetized plasma [J]. Phys. Plasma, 2005, 12(12): 123104−1.
[10] 陈华英, 刘三秋, 李晓卿. 线偏振激光在磁化等离子体中的调制不稳定性[J]. 强激光与粒子束, 2008, 20(12): 2022−2026.
[11] 张文东, 刘三秋, 陈华英, 等. 线偏振激光在相对论等离子体中的调制不稳定性[J]. 强激光与粒子束, 2008, 20(10): 1667−1670.
[12] 姚汝贤, 郝晓飞, 郝东山. Compton散射对磁化等离子体调制不稳定性的影响[J]. 光电子激光, 2011, 22(4): 635−639.
[13] 刘笑兰, 刘三秋, 扬小松. 激光等离子体中的强朗缪尔湍动谱分析[J]. 核聚变与等离子体物理, 2008, 28(2): 125−128.
[14] 郝东山. 朗缪尔湍动对等离子体中调制不稳定性的影响[J]. 核聚变与等离子体物理, 2013, 33(1): 19−24.
[15] 孔青, 朱立俊, 王加祥, 等. 电子在超强激光场中的动力学特性[J]. 物理学报, 1999, 48(4): 650−660.