|
Detailed Reference Information |
Escoubet, C.P., Smith, M.F., Fung, S.F., Hoffman, R.A. and Bosqued, J.M. (1995). Electron structures in the cusp/cleft region observed by DE 2 satellite. Journal of Geophysical Research 100: doi: 10.1029/94JA02307. issn: 0148-0227. |
|
Narrow enhancements of electron precipitation, with energy and flux well above typical values, have been observed with DE 2 in the cusp/cleft region. The electron flux in the energy range 0.2--1 keV was 2 orders of magnitude higher in these structures than in the magnetosheath and were seen in approximately 80% of DE 2 cusp crossings at ionospheric altitudes. Typically, there was more than one electron structure in each cusp crossing. The position of these structures showed a systematic variation: for poleward ion dispersion (energy decreases with increasing latitude), electron structures were seen more often on the equatorial boundary of the cusp, while for equatorward ion dispersion (energy decreases with decreasing latitude), electron structures were more often seen on the poleward boundary. This suggests that the electron structures are associated with newly reconnected field lines. The electron spectra suggest that field-aligned acceleration processes could produce the electron structures, first near the bounary of the cusp/cleft during the reconnection of field lines and then in the cusp/cleft during the motion of reconnected flux tubes through the polar ionosphere. ¿ American Geophysical Union 1995 |
|
|
|
BACKGROUND DATA FILES |
|
|
Abstract |
|
|
|
|
|
Keywords
Ionosphere, Particle precipitation, Ionosphere, Particle acceleration, Ionosphere, Polar cap ionosphere, Magnetospheric Physics, Magnetopause, cusp, and boundary layers |
|
Publisher
American Geophysical Union 2000 Florida Avenue N.W. Washington, D.C. 20009-1277 USA 1-202-462-6900 1-202-328-0566 service@agu.org |
|
|
|