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Record Details

Record 77 of 4556
Excitation of low frequency waves by streaming ions via anomalous cyclotron resonance
External Online Source: doi:10.1063/1.862373
Author and Affiliation:
Wu, C. S.(Maryland, University, College Park, Md., United States)
Dillenburg, D.(Maryland Univ., College Park, MD, United States)
Gaffey, J. D., Jr.(Maryland Univ., College Park, MD, United States)
Ziebell, L. F.(Rio Grande do Sul, Universidade, Federal, Porto Alegre, Brazil)
Goedert, J.(Rio Grande do Sul, Universidade, Federal, Porto Alegre)
Freund, H. P.(U.S. Navy, Naval Research Laboratory, Washington, D.C., United States)
Abstract: The effect of a small population of streaming ions on low-frequency waves with frequencies below the ion cyclotron frequency is analyzed for three modes of interest: Alfven waves, magnetosonic waves, and ion-cyclotron waves. The instability mechanism is the anomalous cyclotron resonance of the waves with the streaming ions. Conditions for excitation of the three types of waves are derived and expressions for the growth rates are obtained. Excitation of Alfven waves is possible even if the ratio of the densities of the streaming ions to the thermal ions is very small. For magnetosonic waves, excitation can easily occur if waves are propagating parallel or nearly parallel to the ambient magnetic field. As for ion-cyclotron waves, it is found that for the ion-whistler branch the excitation is suppressed over a broader range of wave frequencies than for the fast magnetosonic branch.
Publication Date: Aug 01, 1978
Document ID:
19780062926
(Acquired Dec 01, 1995)
Accession Number: 78A46835
Subject Category: PLASMA PHYSICS
Document Type: Journal Article
Publication Information: Physics of Fluids; 21; Aug. 197
Publisher Information: United States
Contract/Grant/Task Num: NGL-21-002-005
Financial Sponsor: NASA; United States
Organization Source: Maryland Univ.; College Park, MD, United States
Rio Grande do Sul Univ.; Porto Alegre, Brazil
Naval Research Lab.; Washington, DC, United States
Universidade Federal de Paraiba; Washington, DC, Brazil
Description: 9p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: CYCLOTRON RESONANCE; ION CYCLOTRON RADIATION; MAGNETOACOUSTIC WAVES; MAGNETOHYDRODYNAMIC STABILITY; MAGNETOHYDRODYNAMIC WAVES; PLASMA WAVES; ATMOSPHERICS; DISTRIBUTION FUNCTIONS; EARTH MAGNETOSPHERE; HISS; MAGNETOSONIC RESONANCE; SOLAR WIND; WHISTLERS
Imprint And Other Notes: Physics of Fluids, vol. 21, Aug. 1978, p. 1318-1326. Research supported by the Conselho Nacional de Desenvolvimento Cientifico e Tecnologico;
Miscellaneous Notes: p. 1318-1326. Research supported by the Conselho Nacional de Desenvolvimento Cientifico e Tecnologico
Availability Source: Other Sources
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