NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Evolution of ion cyclotron instability in the plasma convection system of the magnetosphereIn the present paper, Liouville's theorem is used in combination with approximate, but extremely accurate, expressions which reflect the invariance of the magnetic moment and the longitudinal invariant to determine analytically the evolution of an adiabatically convecting energetic particle distribution. Features of the convecting distribution, reproduced by this model, include positive pitch angle anisotropy, regions in velocity space where the nonmonotonic perpendicular energy distribution is greater than zero, and the energy dependence of the degree of particle injection. The energy dependence of the injection yields upper and lower cutoffs to the distribution within the plasmasphere, and only an upper cutoff outside. This approach is used to study the evolution of ion cyclotron waves in a convecting particle distribution.
Document ID
19800030833
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Kaye, S. M.
(California Univ. Los Angeles, CA, United States)
Kivelson, M. G.
(California, University Los Angeles, Calif., United States)
Southwood, D. J.
(California, University Los Angeles, Calif.; Imperial College of Science and Technology, London, United Kingdom)
Date Acquired
August 10, 2013
Publication Date
November 1, 1979
Publication Information
Publication: Journal of Geophysical Research
Volume: 84
Subject Category
Geophysics
Accession Number
80A15003
Funding Number(s)
CONTRACT_GRANT: NGL-05-007-004
CONTRACT_GRANT: NSF ATM-74-23464
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available