| 强激光在非磁化等离子体中的三维调制不稳定性 |
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| 引用本文： | 汤伟,刘三秋.强激光在非磁化等离子体中的三维调制不稳定性[J].南昌大学学报(理科版),2011,35(3):1. |
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| 作者姓名： | 汤伟 刘三秋 |
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| 作者单位： | 南昌大学物理学系； |
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| 基金项目： | 科技部国际科技合作项目(2009DFA02320); 江西省创新团队(2010DQB00900); 973计划前期研究专项课题(2010CB635112) |
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| 摘 要： | 采用Karpman方法对线偏振激光在非磁化等离子体低密度区和临界面附近的三维调制不稳定性进行了分析,得到了不稳定产生的条件及时间增长率与扰动波数之间的函数关系。在低密度区,考虑了由弱相对论效应引起电子质量变化的一级和二级非线性效应,得出二级非线性效应对调制不稳定性
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| 关 键 词： | 非线性控制方程 调制不稳定性 非线性色散关系 |
Three-dimensional modulation instability of intense laser in unmagnetized plasmas |
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| TANG Wei,LIU San-qiu.Three-dimensional modulation instability of intense laser in unmagnetized plasmas[J].Journal of Nanchang University(Natural Science),2011,35(3):1. |
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| Authors: | TANG Wei LIU San-qiu |
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| Institution: | TANG Wei,LIU San-qiu(Department of Physics,Nanchang University,Nanchang 330031,China) |
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| Abstract: | The three-dimensional modulation instability of linearly polarized laser in low density region and near the critical surface associated with the unmagnetized plasmas was investigated via Karpman method.The conditions for instability and the temporal growth rate as a function of perturbed wave number were derived.In the low density regions,the conclusion that the second-order nonlinear effect has little influence on the modulation instability was obtained by comparing the first and the second-order nonlinear... |
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| Keywords: | modulation instability nonlinear dispersion relation nonlinear governing equation |
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