Abstract
Impulsive bursts of positive ions were observed in the polar cusp during two rocket flights. Dispersion of arrival time with energy implies a modulation or acceleration region at a distance of 11 to 13 R E presumably in the magnetosheath. The ion energy spectra closely match typical magnetosheath spectra. The bursts had a duration of about 20 s and repetition period on the order of 100 s. These results suggest that ions have intermittent rather than continuous entry at the polar cusps. At times, the ion and electron precipitation was anticorrelated in a manner consistent with a parallel electric field.
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© 1976 D. Reidel Publishing Company, Dordrecht-Holland
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Torbert, R.B., Carlson, C.W. (1976). Impulsive Ion Injection into the Polar Cusp. In: McCormac, B.M. (eds) Magnetospheric Particles and Fields. Astrophysics and Space Science Library, vol 58. Springer, Dordrecht. https://doi.org/10.1007/978-94-010-1503-5_5
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DOI: https://doi.org/10.1007/978-94-010-1503-5_5
Publisher Name: Springer, Dordrecht
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