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Fast magnetospheric echoes of energetic electron beamsElectron beam experiments using rocket-borne instrumentation confirmed earlier observations of fast magnetospheric echoes of artificially injected energetic electrons. A total of 234 echoes were observed in a pitch angle range from 9 to 110 deg at energies of 1.87 and 3.90 keV. Of these, 102 echoes could unambiguously be identified with known accelerator operations at 2, 4 or 8 keV energy and highest current levels resulting in the determination of transit times of typically 300 to 400 ms. In most cases, when echoes were present in both energy channels, the higher energy electrons led the lower energy ones by 50 to 70 ms. Adiabatic theory applied to these observations yields a reflection height of 3000 to 4000 km. The injection process is discussed as the strong beam-plasma interaction that occurred near the electron accelerator appears to be instrumental in generating the source of heated electrons required for successful echo detection.
Document ID
19840006119
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Wilhelm, K.
(Max-Planck-Inst. fuer Aeronomie Katlenburg-Lindau, Germany)
Bernstein, W.
(Rice Univ. Minneapolis, United States)
Kellogg, P. J.
(Minnesota Univ. Ottawa, United States)
Whalen, B. A.
(National Research Council of Canada)
Date Acquired
August 12, 2013
Publication Date
July 1, 1983
Publication Information
Publication: ESA Active Expts. in Space
Subject Category
Geophysics
Accession Number
84N14187
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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