The characteristics of dust coagulation process in gravitational direction are investigated in an ethylene RF (radio frequency) discharge plasma system. The experiment shows that dust particles can aggregate into the huge fractal structure (centimeter scale). The coagulation process is mainly characterized by the scattering laser intensity, the distribution of dust clouds, and the fractal dimension. In this experiment, the rotational characteristics of the huge fractal structure can be observed and investigated by the oscillation of the scattering spectrum. These results provide an experimental basis for the investigation of dust coagulations.

中文翻译：

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乙烯射频放电等离子体粉尘垂直混凝过程的实验研究

在乙烯RF（射频）放电等离子系统中研究了重力方向粉尘凝聚过程的特性。实验表明，尘埃粒子可以聚集成巨大的分形结构（厘米级）。凝结过程的主要特征是散射激光强度、尘埃云的分布和分形维数。在本实验中，可以通过散射光谱的振荡来观察和研究巨大分形结构的旋转特性。这些结果为粉尘凝聚的研究提供了实验依据。