Can ion acceleration by double-cyclotron absorption produce O(+) ion conics?

Details Can ion acceleration by double-cyclotron absorption produce O(+) ion conics? Can ion acceleration by double-cyclotron absorption produce O(+) ion conics?

Nov 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989jgr....9415257b&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 94, Nov. 1, 1989, p. 15257-15264.

Computer Science

Numerical Analysis

20

Earth Magnetosphere, Gyrofrequency, Oxygen Ions, Particle Acceleration, Plasmas (Physics), Auroral Zones, Conics, Low Frequencies, Numerical Analysis

Scientific paper

The feasibility of double-cyclotron absorption as a source mechanism for O(+) conic distributions in the earth's magnetosphere is investigated. The appropriate values of the relevant wave and plasma parameters are discussed and the applicability of approximate expressions for the average rate of perpendicular acceleration of O(+) ions due to double-cyclotron absorption, derived by Ball (1989), is reviewed. The acceleration rate which results from the approximations of Ball is shown to be exactly a factor of 5 larger than the corresponding result of Temerin and Roth (1986). A possible explanation for this discrepancy is presented. It is shown that double-cyclotron absorption is indeed capable of producing O(+) ions at energies comparable to those observed by spacecraft.

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