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Dust-acoustic double layers - Ion inertial effectsSpace and astrophysical plasmas often comprise a number of massive ion components in addition to a tenuous, negatively charged dust component and an electron component. Stationary electrostatic double layers in a dusty plasma are investigated in a model treating the ion components as Boltzmann-distributed (inertialess) fluids. On comparison with the inertialess theory, one finds considerably reduced double layer existence parameter regimes. Significantly, highly nonlinear double layers are ruled out when ion inertia is incorporated. However, in the restricted parameter regimes in which the inertial theory predicts double layers for small ion/dust mass ratios (about 10 exp -15-10 exp -8) there is good qualitative agreement with inertialess theory. The reasons for these, and other discrepancies and similarities, are discussed.
Document ID
19930052703
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Mace, Richard L.
(Natal Univ., Durban, South Africa; NASA, Goddard Space Flight Center Greenbelt, MD, United States)
Hellberg, Manfred A.
(Natal Univ. Durban, South Africa)
Date Acquired
August 16, 2013
Publication Date
March 1, 1993
Publication Information
Publication: Planetary and Space Science
Volume: 41
Issue: 3
ISSN: 0032-0633
Subject Category
Astrophysics
Accession Number
93A36700
Distribution Limits
Public
Copyright
Other

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