极区中层尘埃粒子的带电效应

On the Charging Effects of Dust Particles in Polar Mesosphere

  • 摘要: 利用轨道运动限制和尘埃带电理论,分析了在极区中层顶中,尘埃等离子体受高功率无线电磁波的影响下,尘埃粒子的带电效应。此外,利用数值模拟及实验方法对理论分析结果进行了验证。通过理论分析可知,尘埃粒子带电数由尘埃半径大小、电子温度、离子温度的高低以及离子数密度和电子数密度决定。通过数值模拟及统计分析火箭探测数据得到,平均尘埃带电数随等离子体中尘埃电荷数密度的增加而降低,而随尘埃半径、电子温度和电子密度的增加而增加。在一定程度上,仿真及实验结果与理论研究结果较一致,当尘埃带电量为0.4e时,尘埃半径值与文献结果一致。

     

    Abstract: By using the orbit-limited motion (OLM) method and the charging theory of dust particles, the charging effects of dust particles during the condition when dusty plasmas in mesosphere affected by high power radio wave are analyzed in this paper. In addition, the theoretical results are demonstrated by simulated experiments. Through theoretical analysis, it can be known that the number ofcharge dust particles is determined by the size of the dust radius, electron temperature, ion temperature, ion density and electron density. Based on the data of rocket-borne sensors and simulation results, it is found that the average number of charged dust decreases with an increase in dust charges number density and increases with an increase in dust radius, electron temperature, and electron density. The simulation results are close to the theoretical and experimental studied results, and the average radius are consistent with the results of reference when the average dust charge is 0.4e.

     

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