Chin. Phys. Lett.  2002, Vol. 19 Issue (2): 214-216    DOI:
Original Articles |
Electron Density Fluctuation in a Dusty Plasma
LI Fang
Institute of Electronics, Chinese Academy of Sciences, Beijing 100080
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LI Fang 2002 Chin. Phys. Lett. 19 214-216
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Abstract 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 ndZ2. The second source is the charge change of the dust particles, which is of a power spectrum proportional to n2dZ3. The third source is the eigen-mode 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 are high charged. The results may explain the strong electromagnetic scattering by a space dust layer in the Earth's mesosphere.
Keywords: 52.27.Lw      52.25.Gj      52.35.Ra     
Published: 01 February 2002
PACS:  52.27.Lw (Dusty or complex plasmas; plasma crystals)  
  52.25.Gj (Fluctuation and chaos phenomena)  
  52.35.Ra (Plasma turbulence)  
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https://cpl.iphy.ac.cn/       OR      https://cpl.iphy.ac.cn/Y2002/V19/I2/0214
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