Physics
Scientific paper
May 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agusmsm32b..01c&link_type=abstract
American Geophysical Union, Spring Meeting 2002, abstract #SM32B-01
Physics
2700 Magnetospheric Physics, 2736 Magnetosphere/Ionosphere Interactions, 2764 Plasma Sheet, 2400 Ionosphere
Scientific paper
The interchange of plasma between the ionosphere and plasma sheet continues to be a very important element in understanding the formation and dynamics of the plasma sheet. The rotation of the line of apsides of the orbit of the Polar spacecraft has permitted unique observations to be made of the movement of plasma along magnetic field lines that connect the ionosphere and the plasma sheet on the nightside of the magnetosphere. Measurements by the Thermal Ion Dynamics Experiment have been able to observe the flow of ionospheric ions at very low energies into the plasma sheet and to identify the different plasma characteristics in this important region. Typical ion signatures include the tens of eV ions outside the plasmasphere that exhibit both single and double field-aligned flows and the often abrupt changes of the ion distributions both in energy and pitch angle in the neutral sheet region. These observations will add significantly to our knowledge of the role of the ionosphere as a source of plasma sheet particles.
Chandler Michael O.
Chappell Charles R.
Giles Barbara L.
Huddleston M. M.
Moore Thomas Earle
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