Effect of strong coupling on dust acoustic waves and instabilities

Journal Article · Wed Oct 21 04:00:00 EDT 1998 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.56661· OSTI ID:21202176

Rosenberg, M ^[1]; Kalman, G ^[2]

---

1. Department of Electrical and Computer Engineering, University of California, San Diego, La Jolla, California 92093-0407 (United States)
2. Department of Physics, Boston College, Chestnut Hill, Massachusetts 02167 (United States)

The presence of charged dust in a plasma can lead to very low frequency dust acoustic waves and instabilities. In certain laboratory plasmas the dust is strongly coupled, as characterized by the condition {gamma}{sub d}=Q{sub d}{sup 2} exp(-d/{lambda}{sub D})/dT{sub d}{>=}1, where Q{sub d} is the dust charge, d is the intergrain spacing, T{sub d} is the dust thermal energy, and {lambda}{sub D} is the plasma screening length. When the dust is strongly coupled, the spatial correlation of the grains can affect the dispersion relation of these waves. We review our recent work [1] on the dispersion properties of dust acoustic waves in the strongly coupled (liquid) phase in a dusty plasma, including also the effects of dust-neutral collisions. We then discuss a preliminary analysis of the effect of strong dust coupling on an ion dust two-stream instability in a collisional dusty plasma. Applications to laboratory dusty plasmas are discussed.

• OSTI ID: 21202176
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 446; ISSN 0094-243X; ISSN APCPCS
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
COLLISIONAL PLASMA
CORRELATIONS
DISPERSION RELATIONS
DUSTS
ELECTRON COLLISIONS
ION COLLISIONS
ION WAVES
IONS
SOUND WAVES
TWO-STREAM INSTABILITY