Generation of auroral arc elements in an inverted-V arc due to ion cyclotron turbulence

Details Generation of auroral arc elements in an inverted-V arc due to ion cyclotron turbulence Generation of auroral arc elements in an inverted-V arc due to ion cyclotron turbulence

Aug 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983jgr....88.6339k&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 88, Aug. 1, 1983, p. 6339-6345.

Physics

9

Auroral Arcs, Current Sheets, Ion Cyclotron Radiation, Plasma Turbulence, Current Density, Electrostatic Waves, Field Aligned Currents, Magnetic Field Configurations, Satellite Observation

Scientific paper

By using a two-dimensional particle simulation it is shown that the electrostatic ion cyclotron turbulence driven by the field-aligned current on auroral field lines can lead to striations of the current into east-west aligned current sheets of ion gyroradius scale. Physical mechanism for the striation can be identified with nonlinear mode couplings of ion cyclotron waves resulting in condensation of the wave energy into a zero-frequency mode. It is proposed that the auroral arc elements, which collectively give rise to the inverted-V arc, can be produced by the east-west aligned striations of the field-aligned current on inverted-V field lines.

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