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arXiv 2107.10367physics.plasm-ph
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电离波对DC放电中尘埃链形成的影响

Effect of ionization waves on dust chain formation in a DC discharge

L. S. Matthews, K. Vermillion, P. Hartmann, M. Rosenberg, S. Rostami, E. G. Kostadinova, T. W. Hyde, M. Y. Pustylnik, A. M. Lipaev, A. D. Usachev, A. V. Zobnin,… 展开作者

L. S. Matthews, K. Vermillion, P. Hartmann, M. Rosenberg, S. Rostami, E. G. Kostadinova, T. W. Hyde, M. Y. Pustylnik, A. M. Lipaev, A. D. Usachev, A. V. Zobnin, M. H. Thoma, O. Petrov, H. M. Thomas, O. V. Novitskii

摘要:

复杂等离子体的一个有趣的方面是它能够自组织成各种结构配置,并在这些状态之间进行转换。一个引人注目的现象是在对称离子尾场的影响下,在电流变复合等离子体中观察到的各向同性到弦的转变。利用国际空间站上的等离子Kristall-4(PK-4)微重力实验室对这种转变进行了研究。最近的实验和数值模拟表明,在PK-4相关的放电条件下,看似均匀的DC放电柱是高度不均匀的,与微秒时间尺度上发生的电离波相关的大的轴向电场振荡。采用多尺度尘埃-等离子体相互作用的数值模型,研究了电场对单个尘埃粒子电荷、离子尾场和类弦结构的影响。在PK-4实验中,在类似条件下形成的尘埃串的结果进行了比较。

英文摘要:

An interesting aspect of complex plasma is its ability to self-organize into a variety of structural configurations and undergo transitions between these states. A striking phenomenon is the isotropic-to-string transition observed in electrorheological complex plasma under the influence of a symmetric ion wakefield. Such transitions have been investigated using the Plasma Kristall-4 (PK-4) microgravity laboratory on the International Space Station (ISS). Recent experiments and numerical simulations have shown that, under PK-4 relevant discharge conditions, the seemingly homogeneous DC discharge column is highly inhomogeneous, with large axial electric field oscillations associated with ionization waves occurring on microsecond time scales. A multi-scale numerical model of the dust-plasma interactions is employed to investigate the role of the electric field on the charge of individual dust grains, the ion wakefield, and the order of string-like structures. Results are compared to dust strings formed in similar conditions in the PK-4 experiment.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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