Physics
Scientific paper
Jul 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984jgr....89.5538s&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 89, July 1, 1984, p. 5538-5546.
Physics
29
Auroral Zones, Conics, Energy Transfer, Ion Motion, Plasma Heating, Broadband, Particle Acceleration, Plasma Turbulence, Radio Frequency Heating, Vertical Motion, Very Low Frequencies
Scientific paper
Nonresonant heating of plasma ions flowing along geomagnetic field lines by VLF waves is shown to generate ion conics. Ions with energies of less than 1 eV are proven capable of resonance with ionospheric VLF waves excited by electron beams with energies over 100 eV at lower hybrid frequencies (LHF) of 1-1.01. The variation of resonant ion energy with LHF wave frequency is formulated and an expression is derived for the heating rate. The heating rate is then applied to model ion acceleration along a dipole geomagnetic field in terms of the power spectral density of broadband waves, i.e., the VLF noise. Attention is given to ion energization at lower altitudes than the auroral acceleration region and examples of conic acceleration are cited.
Schunk Robert W.
Singh Navinder
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