Physics
Scientific paper
Dec 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsm53b..08s&link_type=abstract
American Geophysical Union, Fall Meeting 2011, abstract #SM53B-08
Physics
[2704] Magnetospheric Physics / Auroral Phenomena, [2712] Magnetospheric Physics / Electric Fields, [2721] Magnetospheric Physics / Field-Aligned Currents And Current Systems, [2736] Magnetospheric Physics / Magnetosphere/Ionosphere Interactions
Scientific paper
We present results from Cluster satellite multi-point event studies from the auroral acceleration region (AAR). Electric potential structures associated with inverted-V aurora are investigated using electric field, magnetic field, ion and electron data from the Cluster spacecraft, crossing the auroral acceleration region (AAR) at different altitudes above the auroral oval. The spatial and temporal development of the acceleration structures is studied, given the magnetic conjunction opportunity and the short time-difference between the Cluster spacecraft crossings. The configuration allowed for estimating the characteristic times of development for the structures and estimating the parallel electric field and potential drop. For one of the negative potential structures, a growth time of 40 s and stability for more than one minute was observed and an average parallel electric field was estimated (~ 0.56 mV/m, between 1.13 and 1.3 RE of altitude).
Fazakerley Andrew N.
Karlsson Roland
Li Baowen
Lindqvist Peter
Lucek Elisabeth A.
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