Simultaneous observation of the electron acceleration and ion deceleration in the dayside high-latitude auroral region

Details Simultaneous observation of the electron acceleration and ion deceleration in the dayside high-latitude auroral region Simultaneous observation of the electron acceleration and ion deceleration in the dayside high-latitude auroral region

Jun 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003georl..30l..17t&link_type=abstract

Geophysical Research Letters, Volume 30, Issue 12, pp. 17-1, CiteID 1615, DOI 10.1029/2003GL017071

Physics

1

Magnetospheric Physics: Electric Fields (2411), Magnetospheric Physics: Energetic Particles, Precipitating, Magnetospheric Physics: Magnetopause, Cusp, And Boundary Layers, Ionosphere: Topside Ionosphere

Scientific paper

SS-520-2 sounding rocket flew through the dayside high-latitude auroral region in the vicinity of the cusp. One of the science instruments LEP-ESA/ISA simultaneously observed electron acceleration and ion deceleration when inverted-V type electron precipitations were observed. The correspondence between the electron acceleration energy and the ion deceleration energy clearly indicated the existence of the quasi-static field-aligned potential drop above the sounding rocket. Moreover, ion deceleration started 9.5 seconds later than electron acceleration. By considering a simple temporal model that field-aligned potential drop gradually grew in 10 seconds at 4200 km altitude region, we have succeeded in explaining the observed characteristics of the electron acceleration and ion deceleration.

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