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Electromagnetic hot ion beam instabilities - Quasi-linear theory and simulationThis paper considers the quasi-linear theory of the right- and left-hand resonant electromagnetic instabilities driven by a hot ion beam streaming parallel to a magnetic field in a homogeneous Vlasov plasma. Using the single-mode approximation, the time evolutions of important parameters are obtained to show that for the range of parameters considered, reduction of the beam speed and formation of temperature anisotropies are the most significant factors in the quasi-linear stabilization process. Combining both instabilities in a quasi-linear study is found to produce a roughly equal mixture of both polarizations and relatively isotropic conditions for tenuous beam densities and low initial beam drift speeds. Computer simulations are used to compare with the quasi-linear results. The simulations justify the single-mode assumption, verify that quasi-linear changes are the means of saturation for the parameter range of concern, and check the nonlinear evolution of the system when both modes are present.
Document ID
19860025567
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Rogers, B.
(Los Alamos National Lab. NM, United States)
Gary, S. P.
(Los Alamos National Lab. NM, United States)
Winske, D.
(Los Alamos National Laboratory NM, United States)
Date Acquired
August 12, 2013
Publication Date
October 1, 1985
Publication Information
Publication: Journal of Geophysical Research
Volume: 90
ISSN: 0148-0227
Subject Category
Plasma Physics
Accession Number
86A10305
Funding Number(s)
CONTRACT_GRANT: NAS10-23726
Distribution Limits
Public
Copyright
Other

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