Observations of plasma waves within regions of perpendicular ion acceleration

Details Observations of plasma waves within regions of perpendicular ion acceleration Observations of plasma waves within regions of perpendicular ion acceleration

Nov 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986georl..13.1113k&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 13, Nov. 1986, p. 1113-1116.

Computer Science

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31

Ion Motion, Ionospheric Ion Density, Particle Acceleration, Plasma Waves, Plasma-Particle Interactions, Space Plasmas, Electric Fields, Hydrogen Ions, Oxygen Ions, Plasma Frequencies

Scientific paper

The acceleration of ionospheric ions transverse to the geomagnetic field by factors of 1000 is believed to be caused by plasma waves. The authors made simultaneous measurements of electric fields and energetic ions within regions of perpendicular ion acceleration from the sounding rocket MARIE. Perpendicular ion acceleration was correlated with plasma waves near and above the lower hybrid frequency. Ions were detected up to energies of 300 eV and the broadband lower hybrid waves reached an amplitude of 10-30 mV/m (RMS) over the frequency band 4-16 kHz. Although electric field amplitudes near the O(+) cyclotron frequency reached a maximum value of 10 mV/m (RMS), there was no spectral evidence of electrostatic ion cyclotron waves associated with ion acceleration. There was spectral evidence of H(+) Bernstein modes near the lower hybrid frequency.

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