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Nonlinear evolution of dust waves driven by cross‐field electron currents
Author(s) -
Scales Wayne A.,
Chae Gyoo Soo
Publication year - 2003
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2002gl016191
Subject(s) - physics , instability , ionosphere , electron , plasma , acoustic wave , nonlinear system , geophysics , computational physics , mechanics , optics , quantum mechanics
The nonlinear evolution of dust waves generated by a low‐frequency Hall current instability in a magnetized collisional dusty plasma is investigated with theory and nonlinear numerical simulations. This instability is believed to have broad applications to irregularity production in regions where dust is present in the earth's ionosphere such as noctilucent clouds and meteor trails. The instability is driven by an electron current and is an analog, in the dust acoustic type wave regime, of the well‐known Farley‐Buneman instability. The results indicate that the instability nonlinearly saturates with dust heating and the production of secondary waves that propagate in a direction perpendicular to the primary dust acoustic type waves.