| 温度各向异性电子束流和电子环束流引起的电磁辐射特征 |
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| 引用本文： | 汪学毅,周国成,张效信,赵华,刘四清.温度各向异性电子束流和电子环束流引起的电磁辐射特征[J].地球物理学报,1999,42(4):437-443. |
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| 作者姓名： | 汪学毅 周国成 张效信 赵华 刘四清 |
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| 作者单位： | 1. 中国科学院空间科学与应用研究中心 北京 100080;
2. 中国科学院日球物理数值开放实验室 北京 100080 |
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| 基金项目： | 863高技术青年基金，国家高性能计算基金!49774247 |
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| 摘 要： | 利用一维三分量完全电磁粒子模拟方法研究了由温度各向异性电子束流和电于环束流引起电磁辐射特征，结果表明它们都能激发高频宽带电磁不稳定性，其中环束流不稳定性（RBI）的非线性饱和水平比温度各向异性束流不稳定性（TABI）强，对RBI波在系统发展的线性增长阶段呈右旋极化，在非线性饱和阶段则主要呈左旋极化，而对TABI波在系统发展的整个阶段均享右旋极化．这些结果可应用于磁化星磁层射电暴的解释中．
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| 关 键 词： | 电磁不稳定性 电子束流 电子环束流 温度各向异性束流 粒子模拟 |
| 收稿时间： | 1999-02-22 |
CHARACTERISTICS OF ELECTROMAGNETIC EMISSION EXCITED BY TEMPERATURE ANISOTROPY BEAM AND RING BEAM ELECTRONS |
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| WANG XUE-YI, ZHOU GUO-CHENG, ZHANG XIAO-XINZHAO HUA, LIU SI-QING.CHARACTERISTICS OF ELECTROMAGNETIC EMISSION EXCITED BY TEMPERATURE ANISOTROPY BEAM AND RING BEAM ELECTRONS[J].Chinese Journal of Geophysics,1999,42(4):437-443. |
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| Authors: | WANG XUE-YI ZHOU GUO-CHENG ZHANG XIAO-XINZHAO HUA LIU SI-QING |
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| Institution: | Center for Space Science and Applied Research, Chinese Academy of Sciences, Beijing 100080, China) 2)(Lab of Numerical Study for Heliospheric Physics, Chinese Academy of Sciences, Beijing 100080, China |
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| Abstract: | The charactenstics of electromagnetic instabilities with high-frequency and widen-spectra waves excited by ring beam electrons and temperature anisotropy beam electrons are studied in this paper using one dimensional three component full electromagnetic particle simulation. The saturated level of ring beam instability (RBI) is higher than that of temperature anisotropy beam instability (TABI). For RBI, right-hand polarized waves emerge initially in linear stage, but in the nonlinear stage, these waves will be evolved into left-hand polarized waves. Otherwise, the right-hand polarized electromagnetic waves are the main wave modes during the whole evolution processes of TABI. These results will be applied to explain some phenomena of radio burst in magnetosphere of magnetized planes. |
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| Keywords: | Electromagnetic instability Electron beam Electron ring beam Temperature anisotropy beam Particle simulation |
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