Fink M A, Zhdanov S K, Thoma M H, Höfner H, Morfill G E
Max Planck Institute for Extraterrestrial Physics, 85741 Garching, Germany.
Phys Rev E Stat Nonlin Soft Matter Phys. 2012 Dec;86(6 Pt 2):065401. doi: 10.1103/PhysRevE.86.065401. Epub 2012 Dec 19.
The observation of a well-developed treelike string structure supported by a gas flow in a three-dimensional dc complex plasma is presented. The dynamically stable strings, comprising 10-20 particles, were up to 5 mm long. The experiments were performed using neon gas at a pressure of 100 Pa and melamine-formaldehyde particles with a diameter of 3.43 μm. Inside the discharge glass tube a nozzle had been built in to supply the controllable gas (plasma) flux intensity distribution along the tube. The walls of the nozzle were transparent for the laser light illuminating the particles. That gave the opportunity to closely study the particle dynamics deep inside the nozzle.
本文介绍了在三维直流复合等离子体中观察到的一种由气流支撑的发育良好的树状丝状结构。这些动态稳定的细丝由10至20个粒子组成，长度可达5毫米。实验使用了压力为100帕的氖气和直径为3.43微米的三聚氰胺-甲醛颗粒。在放电玻璃管内安装了一个喷嘴，以沿管提供可控的气体（等离子体）通量强度分布。喷嘴壁对照亮粒子的激光是透明的。这使得能够深入研究喷嘴内部的粒子动力学。
