| 电磁波被尘埃等离子体散射的功率谱 |
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| 引用本文： | 李芳, O.Havnes. 电磁波被尘埃等离子体散射的功率谱[J]. 电子与信息学报, 1999, 21(5): 679-685. |
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| 作者姓名： | 李芳 O.Havnes |
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| 作者单位： | 中国科学院电子学研究所，挪威特罗姆瑟大学极区研究所 北京 100080 |
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| 基金项目： | 国家自然科学基金,项目号69671002 |
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| 摘 要： | 用等离子体动力论导出的动力形状因子研究尘埃等离子体的散射功率谱。结果表明由于尘埃粒子具有大的荷电量,对于冷电子的非相干散射,即kD1(D是德拜屏蔽长度,k=|K|=|Ks-K0|,K0是入射波矢, Ks是散射波矢),尘埃粒子极大地影响散射谱的特征。散射功率谱在尘埃粒子声波频移处出现特征峰。
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| 关 键 词： | 尘埃等离子体 动力形状因子 非相干散射 散射功率谱 |
| 收稿时间： | 1997-06-11 |
| 修稿时间： | 1998-12-16 |
SCATTER SPECTRUM OF RADIO WAVES BY A DUSTY PLASMA |
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| Li Fang, O. Havnes. SCATTER SPECTRUM OF RADIO WAVES BY A DUSTY PLASMA[J]. Journal of Electronics & Information Technology, 1999, 21(5): 679-685. |
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| Authors: | Li Fang O. Havnes |
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| Affiliation: | Institute of Ecletronics Academia Sinica Beijing 100080;The Auroral Observatory University of Tromso Norway |
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| Abstract: | The scatter spectrum of radio waves by a dusty plasma has been studed with the dynamic factor which was derived from the kinetic theory. It is found that for the case of cooled electrons is the Debye length, and k=|k|=|ks-k0|, k0 and ks is the incident and scatter wave vector, respectivly) the dusty paticles play an important role in the scattering due to its huge charge number. There is a characteristic spiky fine structure in the scatter spectrum, which is of the dust-acoustic wave frequency shift. |
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| Keywords: | Dusty plasma Dynamic factor Incoherent scatter Scatter spectrum |
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