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Lund et al. 1998

Lund, E.J., Möbius, E., Tang, L., Kistler, L.M., Popecki, M.A., Klumpar, D.M., Peterson, W.K., Shelley, E.G., Klecker, B., Hovestadt, D., Temerin, M., Ergun, R.E., McFadden, J.P., Carlson, C.W., Mozer, F.S., Elphic, R.C., Strangeway, R.J., Cattell, C.A. and Pfaff, R.F. (1998). FAST observations of preferentially accelerated He⁺ in association with auroral electromagnetic ion cyclotron waves. Geophysical Research Letters 25: doi: 10.1029/98GL00304. issn: 0094-8276.

The TEAMS instrument on the FAST satellite has detected events in which He+ ions are resonantly accelerated perpendicular to the magnetic field to energies of several keV. The events occur in association with electromagnetic ion cyclotron (EMIC) waves and conic distributions of up to a few hundred eV in H+ and a few keV in O+. Concentrations of He+ can be significantly elevated during the events. Our interpretation is that the He+ ions are accelerated through a cyclotron resonance with the waves. This acceleration is similar to a proposed mechanism for selective ion acceleration in impulsive solar flares. ¿ 1998 American Geophysical Union

BACKGROUND DATA FILES

	Abstract

Keywords
Magnetospheric Physics, Auroral phenomena, Ionosphere, Particle acceleration, Ionosphere, Wave/particle interactions, Magnetospheric Physics, Magnetosphere/ionosphere interactions

Journal
Geophysical Research Letters
http://www.agu.org/journals/gl/

Publisher
American Geophysical Union
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