Autowaves in a dc complex plasma confined behind a de Laval nozzle
| Autor: | Fink, M. A., Zhdanov, S. K., Schwabe, M., Thoma, M. H., Höfner, H., Thomas, H. M., Morfill, G. E. |
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| Rok vydání: | 2013 |
| Předmět: | |
| Zdroj: | EPL, 102 (2013) 45001 |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1209/0295-5075/102/45001 |
| Popis: | 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. Comment: 6 pages, 4 figures |
| Databáze: | arXiv |
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