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The collective gyration of a heavy ion cloud in a magnetized plasmaResults are reported from the ionospheric barium injection experiments CRIT I and CRIT II, during both of which a long-duration oscillation was observed with a frequency close to the gyrofrequency of barium and a time duration of about 1 sec. A model for the phenomenon which was proposed for CRIT I is compared to the results from CRIT II, which made a much more complete set of measurements. The model follows the motion of a low-beta ion cloud through a larger ambient plasma. As the ions move across the magnetic field, the space charge is continuously neutralized by magnetic-field aligned electron currents from the ambient ionosphere, drawn by the divergence in the perpendicular electric field. These currents yield a perturbation of the magnetic field related to the electric perturbation by Delta-E/Delta-B is approximately equal to V sub A. The possibility of extending the model to the active region, where the ions are produced in this type of self-ionizing injection experiments, is discussed.
Document ID
19920065314
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Brenning, N.
(Royal Institute of Technology Stockholm, Sweden)
Swenson, C.
(NASA Headquarters Washington, DC United States)
Kelley, M. C.
(Cornell University Ithaca, NY, United States)
Providakes, J.
(Mitre Corp. Bedford, MA, United States)
Torbert, R.
(New Hampshire, University Durham, United States)
Date Acquired
August 15, 2013
Publication Date
December 1, 1992
Publication Information
Publication: Advances in Space Research
Volume: 12
Issue: 12, D
ISSN: 0273-1177
Subject Category
Geophysics
Accession Number
92A47938
Distribution Limits
Public
Copyright
Other

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