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Title: Three-dimensional structure of self-excited dust density waves under microgravity conditions

Abstract

Self-excited dust density waves in a dusty plasma, containing micrometer-sized particles, have been observed under microgravity conditions at low gas pressures and high dust densities. The waves emerge spontaneously and propagate from the void edge radially outwards to the plasma boundary. We found that the wave propagates obliquely to the local ion flow in regions with high electric fields close to the sheath, whereas it propagates parallel in the plasma bulk. So far the observation was limited to a fixed two-dimensional section through the discharge volume. Recent experiments were performed on parabolic flights in a parallel plate rf discharge, which used the technique of scanning video microscopy. This technique utilizes the high temporal coherence of the waves to reconstruct their full three-dimensional structure. The analysis yields a surprising global spatial coherence of the wave phenomenon.

Authors:
; ;  [1]
  1. Institut fuer Experimentelle und Angewandte Physik, Christian-Albrechts Universitaet Kiel, D-24098 Kiel (Germany)
Publication Date:
OSTI Identifier:
21251213
Resource Type:
Journal Article
Journal Name:
AIP Conference Proceedings
Additional Journal Information:
Journal Volume: 1041; Journal Issue: 1; Conference: 5. international conference on the physics of dusty plasmas, Ponta Degada, Azores (Portugal), 18-23 May 2008; Other Information: DOI: 10.1063/1.2996754; (c) 2008 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0094-243X
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; DUSTS; ELECTRIC FIELDS; HIGH-FREQUENCY DISCHARGES; IONS; MAGNETOHYDRODYNAMICS; PLASMA; PLASMA DENSITY; RF SYSTEMS; THREE-DIMENSIONAL CALCULATIONS; TWO-DIMENSIONAL CALCULATIONS; VOIDS; WALL EFFECTS; WAVE PROPAGATION; WEIGHTLESSNESS

Citation Formats

Arp, Oliver, Menzel, Kristoffer, and Piel, Alexander. Three-dimensional structure of self-excited dust density waves under microgravity conditions. United States: N. p., 2008. Web. doi:10.1063/1.2996754.
Arp, Oliver, Menzel, Kristoffer, & Piel, Alexander. Three-dimensional structure of self-excited dust density waves under microgravity conditions. United States. https://doi.org/10.1063/1.2996754
Arp, Oliver, Menzel, Kristoffer, and Piel, Alexander. 2008. "Three-dimensional structure of self-excited dust density waves under microgravity conditions". United States. https://doi.org/10.1063/1.2996754.
@article{osti_21251213,
title = {Three-dimensional structure of self-excited dust density waves under microgravity conditions},
author = {Arp, Oliver and Menzel, Kristoffer and Piel, Alexander},
abstractNote = {Self-excited dust density waves in a dusty plasma, containing micrometer-sized particles, have been observed under microgravity conditions at low gas pressures and high dust densities. The waves emerge spontaneously and propagate from the void edge radially outwards to the plasma boundary. We found that the wave propagates obliquely to the local ion flow in regions with high electric fields close to the sheath, whereas it propagates parallel in the plasma bulk. So far the observation was limited to a fixed two-dimensional section through the discharge volume. Recent experiments were performed on parabolic flights in a parallel plate rf discharge, which used the technique of scanning video microscopy. This technique utilizes the high temporal coherence of the waves to reconstruct their full three-dimensional structure. The analysis yields a surprising global spatial coherence of the wave phenomenon.},
doi = {10.1063/1.2996754},
url = {https://www.osti.gov/biblio/21251213}, journal = {AIP Conference Proceedings},
issn = {0094-243X},
number = 1,
volume = 1041,
place = {United States},
year = {Sun Sep 07 00:00:00 EDT 2008},
month = {Sun Sep 07 00:00:00 EDT 2008}
}