Kinetic instability of the dust acoustic mode in inhomogeneous, partially magnetized plasma with both positively and negatively charged grains

Journal Article · Sun Aug 15 00:00:00 EDT 2010 · Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics (Print)

DOI:https://doi.org/10.1103/PHYSREVE.82.026411· OSTI ID:21464495

Vranjes, J; Poedts, S ^[1]

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1. Centre for Plasma Astrophysics, Celestijnenlaan 200B, 3001 Leuven (Belgium) and Leuven Mathematical Modeling and Computational Science Research Centre (LMCC), Celestijnenlaan 200B, 3001 Leuven (Belgium)

A purely kinetic instability of the dust acoustic mode in inhomogeneous plasmas is discussed. In the presence of a magnetic field, electrons and ions may be magnetized while at the same time dust grains may remain unmagnetized. Although the dynamics of the light species is strongly affected by the magnetic field, the dust acoustic mode may still propagate in practically any direction. The inhomogeneity implies a source of free energy for an instability that develops through the diamagnetic drift effects of the magnetized species. It is shown that this may be a powerful mechanism for the excitation of dust acoustic waves. The analysis presented in the work is also directly applicable to plasmas containing both positive and negative ions and electrons, provided that at least one of the two ion species is unmagnetized.

• OSTI ID: 21464495
• Journal Information: Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics (Print), Vol. 82, Issue 2; Other Information: DOI: 10.1103/PhysRevE.82.026411; (c) 2010 The American Physical Society; ISSN 1539-3755
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ANIONS
DUSTS
ELECTRONS
EXCITATION
FREE ENERGY
INHOMOGENEOUS PLASMA
MAGNETIC FIELDS
PLASMA DIAMAGNETISM
PLASMA DRIFT
PLASMA INSTABILITY
PLASMA WAVES
SOUND WAVES
CHARGED PARTICLES
DIAMAGNETISM
ELEMENTARY PARTICLES
ENERGY
ENERGY-LEVEL TRANSITIONS
FERMIONS
INSTABILITY
IONS
LEPTONS
MAGNETISM
PHYSICAL PROPERTIES
PLASMA
THERMODYNAMIC PROPERTIES