| Electron Density Fluctuation in a Dusty Plasma |
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| 作者姓名： | 李芳 |
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| 作者单位： | InstituteofElectronics,ChineseAcademyofSciences,Beijing,Beijing100080 |
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| 摘 要： | ![]()
The expressions of electron density fluctuation produced by dust particles in a dusty plasma are derived.It is shown that the fluctuation comes from three different sources.The first source is the thermal motion of the dust particles,which is of a fluctuation power spectrum proportional to ndZ^2.The second source is the charge change of the dust particles,which is of a power spectrum proportional to nd^2Z%3.The third source is the eigenmode oscillation of the dust particles,which is of fluctuation power spectrum proportional to √nd.The powerful electron density fluctuation exists in a dusty plasma due to the fact that the dust particles ar highly charged.The results may explain the strong electromagnetic scattering by a space dust layer in the Earth‘s mesosphere.
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| 关 键 词： | 等离子体 粉状等离子体 电子密度涨落 |
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