Oblique interactions of dust density waves

Journal Article · Wed Jun 16 04:00:00 EDT 2010 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3460140· OSTI ID:21366941

Yangfang, Li ^[1]; Zhehui, Wang ^[2]; Lujing, Hou; Ke, Jiang; Thomas, Hubertus M; Morfill, Gregor E ^[1]; Dejin, Wu ^[3]

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1. Max-Planck-Institute for Extraterrestrial Physics, 85748 Garching (Germany)
2. Los Alamos National Laboratory, Los Alamos, NM 87545 (United States)
3. Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210008 (China)

Self-excited dust density waves (DDWs) are studied in a striped electrode device. In addition to the usual perpendicularly (with respect to the electrode) propagating DDWs, which have been frequently observed in dusty plasma experiments on the ground, a low-frequency oblique mode is also observed. This low-frequency oblique DDW has a frequency much lower than the dust plasma frequency and its spontaneous excitation is observed even with a very low dust density. It is found that the low-frequency oblique mode can exist either separately or together with the usual perpendicular mode. In the latter case, a new mode arises as a result of the interactions between the perpendicular and the oblique modes. The experiments show that these three modes satisfy the wave coupling conditions in both the frequencies and the wave-vectors.

• OSTI ID: 21366941
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1242; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
DENSITY
DUSTS
ELECTRODES
ENERGY-LEVEL TRANSITIONS
EXCITATION
INTERACTIONS
LANGMUIR FREQUENCY
PHYSICAL PROPERTIES
PLASMA
PLASMA DENSITY
SOUND WAVES
TENSORS
VECTORS