Obliquely propagating dust-density waves

Journal Article · Fri Feb 15 04:00:00 EST 2008 · Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics (Print)

DOI:https://doi.org/10.1103/PHYSREVE.77.026407· OSTI ID:21101950

Piel, A; Arp, O; Klindworth, M; Melzer, A ^[1]

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1. IEAP, Christian-Albrechts-Universitaet, D-24098 Kiel (Germany)

Self-excited dust-density waves are experimentally studied in a dusty plasma under microgravity. Two types of waves are observed: a mode inside the dust volume propagating in the direction of the ion flow and another mode propagating obliquely at the boundary between the dusty plasma and the space charge sheath. The dominance of oblique modes can be described in the frame of a fluid model. It is shown that the results fom the fluid model agree remarkably well with a kinetic electrostatic model of Rosenberg [J. Vac. Sci. Technol. A 14, 631 (1996)]. In the experiment, the instability is quenched by increasing the gas pressure or decreasing the dust density. The critical pressure and dust density are well described by the models.

• OSTI ID: 21101950
• Journal Information: Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics (Print), Journal Name: Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics (Print) Journal Issue: 2 Vol. 77; ISSN 1539-3755
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
CRITICAL PRESSURE
DUSTS
PLASMA
PLASMA DENSITY
PLASMA INSTABILITY
PLASMA PRESSURE
PLASMA SHEATH
PLASMA WAVES
SPACE CHARGE