Physics
Scientific paper
Dec 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agufmsm43c..05m&link_type=abstract
American Geophysical Union, Fall Meeting 2006, abstract #SM43C-05
Physics
2700 Magnetospheric Physics (6939), 2723 Magnetic Reconnection (7526, 7835), 7845 Particle Acceleration, 7846 Plasma Energization
Scientific paper
Near a magnetotail reconnection site, energetic electron bursts (50-100 keV) were observed by the Cluster spacecraft. These bursts correlate closely with spiky electric fields and pulse-like structures in the magnetic field. The spiky electric fields have DC components greater than 20 mV/m and AC components reaching 300 mV/m peak to peak. The pulse-like magnetic structures have Δ B/B ~ 1 and time durations comparable to one proton gyroperiod. Most of the energetic electron bursts were observed near the separatrices in the reconnection exhaust. Our observations are consistent with electron acceleration by electric fields at the separatrices. The strong correlation between the electron bursts and sudden commencements of large-amplitude electric and magnetic structures suggests that the underlying reconnection dynamics is impulsive and non-steady.
Bhattacharjee Anirban
Chen Leon L.
Daly Phil
Georgescu Edita
Imada Shin
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