| 无碰撞等离子体中电子束流不稳定性的时空演化研究 |
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| 引用本文： | 郑春阳,刘占军,李纪伟,张爱清,裴文兵.无碰撞等离子体中电子束流不稳定性的时空演化研究[J].物理学报,2005,54(5):2138-2146. |
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| 作者姓名： | 郑春阳 刘占军 李纪伟 张爱清 裴文兵 |
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| 作者单位： | 1. 北京应用物理与计算数学研究所,北京,100088
2. 中国工程物理研究院研究生部,北京,100088 |
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| 基金项目： | 国家高技术研究发展计划及国家自然科学基金(批准号：10375011，10335020)资助的课题. |
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| 摘 要： | 应用二、三维相对论电磁粒子模拟程序研究双电子束流在无碰撞等离子体中传播引起的横向 电磁(Weibel类型)不稳定性和纵向静电不稳定性的发展演化过程.讨论了纯粹Weibel不稳定 性的发生和非线性饱和过程，观察到电流束合并、磁场重联等引起的电子横向加热现象.研 究了电流束传播方向激发的静电场对快电子束传播的影响，观察到其导致的束的横向调制、 磁场通道破坏现象.对这些过程的细致研究对更好的理解快点火物理中自生磁场的产生、快 电子输运等过程有重要意义.
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| 关 键 词： | 粒子模拟 Weibel不稳定性 静电不稳定性 磁场重联 快点火 |
| 文章编号： | 1000-3290/2005/54(05)2138-09 |
| 收稿时间： | 7/9/2004 12:00:00 AM |
| 修稿时间： | 9/8/2004 12:00:00 AM |
Spatio temporal evolution of electron beam instability in collisionless plasmas |
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| Zheng Chun-Yang,Liu Zhan-Jun,Li Ji-Wei,Zhang Ai-Qing,Pei Wen-Bing.Spatio temporal evolution of electron beam instability in collisionless plasmas[J].Acta Physica Sinica,2005,54(5):2138-2146. |
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| Authors: | Zheng Chun-Yang Liu Zhan-Jun Li Ji-Wei Zhang Ai-Qing Pei Wen-Bing |
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| Abstract: | The spatio temporal evolution of electromagnetic (Weibel-type) and electrostati c (two-stream) instabilities of electron beams propagating in collisionle ss plasmas were investigated by using electromagnetic relativistic particl e-in-cell simulations. The onset and nonlinear saturation of Weibel instability , the emergence of beams and magnetic field reconnection were discussed. T he excitation of longitudinal electric field plays an important role for the stable propagation of electron beams, which can be destructed by the transverse modulation due to two-stream instability. These results may be important for understanding the static magnetic field generation and fast electron propagati on in fast ignition physics. |
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| Keywords: | particle in cell Weibel instability electrostatic instability magnetic field reconnection fast ignition |
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