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Electrostatic ion instabilities in the presence of parallel currents and transverse electric fields
Author(s) -
Ganguli G.,
Palmadesso P. J.
Publication year - 1988
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/gl015i001p00103
Subject(s) - transverse plane , physics , electric field , ion , excitation , atomic physics , plasma , ionosphere , magnetic field , context (archaeology) , electron , electric current , computational physics , geophysics , nuclear physics , geology , paleontology , structural engineering , quantum mechanics , engineering
The electrostatic ion instabilities are studied for oblique propagation in the presence of magnetic field‐aligned currents and transverse localized electric fields in a weakly collisional plasma. The presence of transverse electric fields result in mode excitation for magnetic field aligned current values that are otherwise stable. The electron collisions enhance the growth while ion collisions have a damping effect. These results are discussed in the context of observations of low frequency ion modes in the auroral ionosphere by radar and rocket experiments.