Physics
Scientific paper
Apr 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001georl..28.1459c&link_type=abstract
Geophysical Research Letters, Volume 28, Issue 8, p. 1459-1462
Physics
16
Magnetospheric Physics: Energetic Particles, Trapped, Magnetospheric Physics: Magnetopause, Cusp, And Boundary Layers, Magnetospheric Physics: Magnetospheric Configuration And Dynamics, Magnetospheric Physics: Ring Current
Scientific paper
On 8/27/96 from 8 to 10:36 UT the POLAR satellite crossed the dayside cusp and observed very energetic ionospheric O<=+2 ions which had a magnetic moment spectrum, M(E) that followed a power law. Later at 14:45 to 15:30 UT the satellite passed through the ring current at 15-16 MLT where the O<=+2 ions again had a M(E) power law form but with a spectral amplitude that was two orders of magnitude lower. During this period from 8 to 16 UT there were no magnetic storms as Dst had an average value of ~ -5 nT. The comparison of the fluxes at constant M means that the energetic ions in the cusp cannot have a source in the ring current. Arguments are given that the comparison of these sequential measurements of M(E) are valid and that a new mechanism is needed for producing these energetic ionospheric ions observed in the cusp.
Chen Jiasheng
Fritz Theodore A.
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