Physics
Scientific paper
Oct 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004georl..3120806k&link_type=abstract
Geophysical Research Letters, Volume 31, Issue 20, CiteID L20806
Physics
4
Magnetospheric Physics, Magnetospheric Physics: Magnetotail, Magnetospheric Physics: Magnetotail Boundary Layers, Magnetospheric Physics: Plasma Sheet, Magnetospheric Physics: Storms And Substorms
Scientific paper
We present here simultaneous H+ and O+ ion dispersion signatures observed by three Cluster spacecraft above the northern auroral zone. These observations occur during strong geomagnetic activity (Kp = 9) and are consistent with a time-of-flight (TOF) dispersion of the ions. Using the TOF dispersion of H+ and O+ and bouncing properties of H+, we show that the ions originate from a distant source located near 80 Re down tail. Our results show that the magnetotail is topographically stable to support multiple bouncing of H+ ions during a storm period. Furthermore these results could suggest that the plasmasheet H+ and O+ ions have been accelerated to the same velocity in the vicinity of a reconnection region.
Daly Patrick W.
Dandouras Iannis
Franz Marcel
Friedel Reiner
Fritz Teresa A.
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