The energetic ion substorm injection boundary

Details The energetic ion substorm injection boundary The energetic ion substorm injection boundary

Jan 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990jgr....95..109l&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 95, Jan. 1, 1990, p. 109-117. Research supported by NASA.

Physics

56

Earth Orbital Environments, Geomagnetism, Ion Injection, Magnetic Storms, Ampte (Satellites), Current Sheets, Geomagnetic Tail, Geosynchronous Orbits

Scientific paper

In this paper, 167 dispersionless energetic ion injections which were observed by AMPTE CCE are identified. The radial and local time distribution of the events as a function of kp is qualitatively similar to that envisioned in the injection boundary model of Mauk and McIlwain (1974). It is argued that particles observed during dispersionless injections are locally energized during the disruption of the cross-tail current sheet. Therefore, the injection boundary is identified as derived from the spatial distribution of dispersionless injections, with the earthward edge of the region of the magnetotail which undergoes current sheet disruption during the substorm expansion phase. It is shown that this qualitative model for the generation of the injection boundary can provide an explanation for the dispersionless nature, the double spiral shape, and the Kp dependence of the boundary.

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