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A nonthermal ion layer with high anisotropies at the plasmasheet boundary during substorm recoveryThe energy spectra and anisotropies of protons and alpha particles are investigated at the plasmasheet boundary during the recovery phase of geomagnetic substorms using the Max Planck Institut/University of Maryland sensor system on the ISEE-1 satellite. The observations are found to reveal the presence of a thin nonthermal layer of approximately 60 keV/charge protons and alpha particles at the plasmasheet boundary, the particles streaming highly collimated in earthward direction. It is pointed out that the alpha particle layer is confined within the proton layer. It is thought that the principal features of the layers can be explained in terms of an acceleration model proposed by Speiser (1965) for the environment of a magnetic neutral line.
Document ID
19810048945
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Moebius, E.
(Max-Planck-Inst. fuer Extraterrestrische Physik Garching, Germany)
Scholer, M.
(Max-Planck-Inst. fuer Extraterrestrische Physik Garching, Germany)
Hovestadt, D.
(Max-Planck-Inst. fuer Extraterrestrische Physik Garching, Germany)
Klecker, B.
(Max-Planck-Institut fuer extraterrestrische Physik Garching, Germany)
Ipavich, F. M.
(Max-Planck-Inst. fuer Extraterrestrische Physik Garching, Germany)
Gloeckler, G.
(Maryland, University College Park, Md., United States)
Date Acquired
August 11, 2013
Publication Date
January 1, 1981
Subject Category
Geophysics
Accession Number
81A33349
Funding Number(s)
CONTRACT_GRANT: NAS5-20062
CONTRACT_GRANT: BMFT-RV14-B8/74
Distribution Limits
Public
Copyright
Other

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