Mass-dependent effects in ion conic production: The role of parallel electric fields

Details Mass-dependent effects in ion conic production: The role of parallel electric fields Mass-dependent effects in ion conic production: The role of parallel electric fields

Dec 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999georl..26.3593l&link_type=abstract

Geophysical Research Letters, Volume 26, Issue 24, p. 3593-3596

Physics

15

Ionosphere: Particle Acceleration, Ionosphere: Wave/Particle Interactions, Magnetospheric Physics: Auroral Phenomena, Magnetospheric Physics: Electric Fields

Scientific paper

Previous observational studies indicate that the energies of different ion species in ion conics produced by broad-band extremely low frequency (BBELF) waves are nearly equal. In contrast, theoretical studies predict a definite preferential acceleration for heavy ions over lighter ions. We show that this discrepancy can be resolved if a downward parallel electric field is present in the heating region: for a sufficiently strong electric field ions of different masses acquire approximately the same energy in escaping the trapping region.

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