A possible mechanism for the observed streaming of O(+) and H(+) ions at nearly equal speeds in the distant magnetotail

Details A possible mechanism for the observed streaming of O(+) and H(+) ions at nearly equal speeds in the distant magnetotail A possible mechanism for the observed streaming of O(+) and H(+) ions at nearly equal speeds in the distant magnetotail

Jul 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985jgr....90.6361s&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 90, July 1, 1985, p. 6361-6369.

Physics

11

Geomagnetic Tail, Hydrogen Ions, Ion Motion, Oxygen Ions, Space Plasmas, Particle Acceleration, Pitch (Inclination), Velocity Distribution

Scientific paper

In recent years, O(+) and H(+) ions streaming away from the earth along geomagnetic field lines have been observed in the distant magnetotail region. In the present paper, it is suggested that the transverse acceleration of the ions occurs on auroral field lines at altitudes above the field-aligned potential drops, where ion beams and electrostatic hydrogen cyclotron (EHC) waves have been simultaneously observed. It is pointed out that the preferential acceleration of O(+) relative to H(+) occurs through the interaction of O(+) ions with weak EHC waves, as suggested by Singh et al. (1983). A quantitative explanation is provided for the observed relationship between the energies of O(+) and H(+) ions.

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