Autowaves in a dc complex plasma confined behind a de Laval nozzle

被引：16
作者：
Fink, M. A. [1 ]
Zhdanov, S. K. [1 ]
Schwabe, M. [1 ,2 ]
Thoma, M. H. [1 ]
Hoefner, H. [1 ]
Thomas, H. M. [1 ]
Morfill, G. E. [1 ]
机构：
[1] Max Planck Inst Extraterr Phys, D-85748 Garching, Germany
[2] Univ Calif Berkeley, Dept Chem & Biomol Engn, Berkeley, CA 94720 USA
来源：
EPL | 2013年 / 102卷 / 04期
基金：
欧洲研究理事会;
关键词：
PROJECT PLASMAKRISTALL-4 PK-4; DUSTY PLASMAS; MICROGRAVITY CONDITIONS; INSTABILITIES; WAVES; FIELD;
D O I：
10.1209/0295-5075/102/45001
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Experiments to explore stability conditions and topology of a dense microparticle cloud supported against gravity by a gas flow were carried out. By using a nozzle-shaped glass insert within the glass tube of a dc discharge plasma chamber a weakly ionized gas flow through a de Laval nozzle was produced. The experiments were performed using neon gas at a pressure of 100 Pa and melamine-formaldehyde particles with a diameter of 3.43 mu m. The capturing and stable global confining of the particles behind the nozzle in the plasma were demonstrated. The particles inside the cloud behaved as a single convection cell inhomogeneously structured along the nozzle axis in a tube-like manner. The pulsed acceleration localized in the very head of the cloud mediated by collective plasma-particle interactions and the resulting wave pattern were studied in detail. Copyright (c) EPLA, 2013
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页数：6
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