Abstract

We have analyzed the data obtained at the PK-3 Plus Laboratory onboard the International Space Station from analysis of the crystallization front propagation in a dusty plasma. We have developed the “axial” algorithm for identifying “crystal-like” particles, which makes it possible to recognize different crystalline domains and their surface. We have proposed a method for determining the 3D front velocity, presuming the existence of a small region of the domain surface, which propagates along a certain line perpendicular to this region. It is shown that the front velocity is almost independent of time and amounts to about 60 μm/s. We have proposed a theory of the crystallization front propagation in the dust cloud under the assumption that the flux of particles being crystallized is proportional to the difference in the self-diffusion coefficients for the liquid and crystalline phases. The upper estimate of the front velocity correlates with the results of processing of experimental data.

中文翻译：

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3D结晶前沿在强非理想多灰尘等离子体中的传播

摘要

我们已经分析了在国际空间站上PK-3 Plus实验室获得的数据，该数据是通过分析尘土等离子体中的结晶前沿传播而得出的。我们已经开发了用于识别“类晶体”颗粒的“轴向”算法，从而可以识别不同的晶体域及其表面。我们提出了一种确定3D前沿速度的方法，假设存在畴表面的一小部分区域，该区域沿着垂直于该区域的特定线传播。结果表明，正面速度几乎与时间无关，约为60μm/ s。我们提出了一种在粉尘云中结晶前沿传播的理论，其假设是被结晶的颗粒通量与液相和结晶相的自扩散系数之差成正比。前速度的上估计与实验数据的处理结果相关。