Three-dimensional structure of a string-fluid complex plasma

M. Pustylnik, B. Klumov, M. Rubin-Zuzic, A. Lipaev, V. Nosenko, D. Erdle, A. Usachev, A. Zobnin, V. Molotkov, G. Joyce, H.M.Thomas, M. Thoma, O. Petrov, V. Fortov, O.Kononenko Institut fur Materialphysik im Weltraum, Deutsche Forschungsanstalt für Luft und Raumfahrt, G. I. F. H. Temperatures, R. A. O. Sciences, Russia Ural Federal University, R. I. F. T. Physics, Technology, Russia I. Physikalisches Institut, Justus-Liebig-University Giessen, Giessen, Germany Gagarin Research, Test Cosmonaut Training Center, Russia.
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引用次数: 8

Abstract

Three-dimensional structure of complex (dusty) plasmas was investigated under long-term microgravity conditions in the International-Space-Station-based Plasmakristall-4 facility. The microparticle suspensions were confined in a polarity-switched dc discharge. The experimental results were compared to the results of the molecular dynamics simulations with the interparticle interaction potential represented as a superposition of isotropic Yukawa and anisotropic quadrupole terms. Both simulated and experimental data exhibited qualitatively similar structural features indicating the bulk liquid-like order with the inclusion of solid-like strings aligned with the axial electric field. Individual strings were identified and their size spectrum was calculated. The decay rate of the size spectrum was found to decrease with the enhancement of string-like structural features.
弦-流体复合等离子体的三维结构
在基于国际空间站的Plasmakristall-4设施中,研究了长期微重力条件下复杂(尘埃)等离子体的三维结构。微粒悬浮液被限制在极性开关直流放电中。将粒子间相互作用势表示为各向同性汤川项和各向异性四极项的叠加,将实验结果与分子动力学模拟结果进行了比较。模拟数据和实验数据均显示出质量上相似的结构特征,表明在轴向电场作用下,颗粒呈液体状有序,其中包含固体状弦。识别单个字符串并计算其大小谱。尺寸谱的衰减速率随着弦状结构特征的增强而减小。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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