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Low-frequency waves in a high-beta collisionless plasma Polarization, compressibility and helicityThis paper considers the linear theory of waves near and below the ion cyclotron frequency in an isothermal electron-ion Vlasov plasma which is isotropic, homogeneous and magnetized. Numerical solutions of the full dispersion equation for the magnetosonic/whistler and Alfven/ion cyclotron modes at beta(i) = 1.0 are presented, and the polarizations, compressibilities, helicities, ion Alfven ratios and ion cross-helicities are exhibited and compared. At sufficiently large beta(i) and theta, the angle of propagation with respect to the magnetic field, the real part of the polarization of the Alfven/ion cyclotron wave changes sign, so that, for such parameters, this mode is no longer left-hand polarized. The Alfven/ion cyclotron mode becomes more compressive as the wavenumber increases, whereas the magnetosonic/whistler becomes more compressive with increasing theta.
Document ID
19870029143
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Gary, S. P.
(Los Alamos National Laboratory NM, United States)
Date Acquired
August 13, 2013
Publication Date
June 1, 1986
Publication Information
Publication: Journal of Plasma Physics
Volume: 35
ISSN: 0022-3778
Subject Category
Plasma Physics
Accession Number
87A16417
Distribution Limits
Public
Copyright
Other

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