NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Computer simulations of electromagnetic cool ion beam instabilitiesElectromagnetic ion beam instabilities driven by cool ion beams at propagation parallel or antiparallel to a uniform magnetic field are studied using computer simulations. The elements of linear theory applicable to electromagnetic ion beam instabilities and the simulations derived from a one-dimensional hybrid computer code are described. The quasi-linear regime of the right-hand resonant ion beam instability, and the gyrophase bunching of the nonlinear regime of the right-hand resonant and nonresonant instabilities are examined. It is detected that in the quasi-linear regime the instability saturation is due to a reduction in the beam core relative drift speed and an increase in the perpendicular-to-parallel beam temperature; in the nonlinear regime the instabilities saturate when half the initial beam drift kinetic energy density is converted to fluctuating magnetic field energy density.
Document ID
19860049551
Document Type
Reprint (Version printed in journal)
Authors
Gary, S. P. (Los Alamos National Lab. NM, United States)
Madland, C. D. (Los Alamos National Lab. NM, United States)
Schriver, D. (Los Alamos National Lab. NM, United States)
Winske, D. (Los Alamos National Laboratory NM, United States)
Date Acquired
August 12, 2013
Publication Date
April 1, 1986
Publication Information
Publication: Journal of Geophysical Research
Volume: 91
ISSN: 0148-0227
Subject Category
GEOPHYSICS
Distribution Limits
Public
Copyright
Other