Evidence of strong energetic ion acceleration in the near-Earth magnetotail

Until now it is still questionable whether ions are accelerated to energies above 100 keV in the near‐Earth current sheet (CS), in the vicinity of a possible near‐Earth neutral line. By using 11 years of 3‐D energetic ion flux data for protons, helium, and oxygen (~150 keV–1 MeV) from the RAPID inst...

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Bibliographic Details
Published in:Geophysical research letters 2014-06, Vol.41 (11), p.3724-3730
Main Authors: Luo, H., Kronberg, E. A., Grigorenko, E. E., Fränz, M., Daly, P. W., Chen, G. X., Du, A. M., Kistler, L. M., Wei, Y.
Format: Article
Language:English
Subjects:
Acceleration
Anisotropy
Boards
Cluster spacecraft
Clusters
Correlation
Current sheets
Earth
energetic ions
Energy
Energy spectra
Flux
Hardening
Helium
Ion acceleration
Ion flux
Ions
Magnetotails
Onboard
Oxygen
Protons
Spacecraft
Spectra
Spectrometry
Spectroscopy
Statistical correlation
Three dimensional
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Summary:Until now it is still questionable whether ions are accelerated to energies above 100 keV in the near‐Earth current sheet (CS), in the vicinity of a possible near‐Earth neutral line. By using 11 years of 3‐D energetic ion flux data for protons, helium, and oxygen (~150 keV–1 MeV) from the RAPID instrument on board Cluster 4, we statistically study the energetic ion acceleration by investigating ion anisotropies in the near‐Earth magnetotail (−20 RE  150 keV may occur in the near‐Earth CS The acceleration is a spatially localized process
ISSN:0094-8276
1944-8007
DOI:10.1002/2014GL060252