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Record Details

Record 16 of 744
Electrostatic ion cyclotron velocity shear instability
Author and Affiliation:
Lemons, D. S.(NASA, Washington, DC, United States)
Winske, D.(NASA, Washington, DC, United States)
Gary, S. P.(Los Alamos National Lab., NM, United States)
Abstract: A local electrostatic dispersion equation is derived for a shear flow perpendicular to an ambient magnetic field, which includes all kinetic effects and involves only one important parameter. The dispersion equation is cast in the form of Gordeyev integrals and is solved numerically. Numerical solutions indicate that an ion cyclotron instability is excited. The instability occurs roughly at multiples of the ion cyclotron frequency (modified by the shear), with the growth rate or the individual harmonics overlapping in the wavenumber. At large values of the shear parameter, the instability is confined to long wavelengths, but at smaller shear, a second distinct branch at shorter wavelengths also appears. The properties of the instability obtained are compared with those obtained in the nonlocal limit by Ganguli et al. (1985, 1988).
Publication Date: Dec 01, 1992
Document ID:
19930037003
(Acquired Dec 28, 1995)
Accession Number: 93A21000
Subject Category: PLASMA PHYSICS
Document Type: Journal Article
Publication Information: Journal of Geophysical Research (ISSN 0148-0227); 97; A12; p. 19,381-19,387.
Publisher Information: United States
Financial Sponsor: NASA; United States
Organization Source: NASA; Washington, DC, United States
Description: 7p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: ELECTROSTATIC WAVES; ION CYCLOTRON RADIATION; KELVIN-HELMHOLTZ INSTABILITY; MAGNETIC FIELD CONFIGURATIONS; MAGNETOHYDRODYNAMIC FLOW; PLASMA LAYERS; FLOW VELOCITY; MAGNETOPAUSE; SHEAR FLOW; SHEAR LAYERS
Imprint And Other Notes: Journal of Geophysical Research vol. 97, no. A12 p. 19,381-19,387. Dec. 1, 1992
Miscellaneous Notes: Research supported by NASA and DOE
Availability Source: Other Sources
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