Physics
Scientific paper
Feb 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986jgr....91.1529s&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 91, Feb. 1, 1986, p. 1529-1534.
Physics
49
Gyrotropism, Ion Beams, Low Frequencies, Plasma Waves, Plasma-Particle Interactions, Space Plasmas, Coupled Modes, Magnetohydrodynamic Stability, Vlasov Equations, Wave Propagation
Scientific paper
The origin of left- and right-hand-polarized low-frequency waves in space plasmas is analyzed. It has been shown that a gyrotropic gyrating ion beam, a ring in velocity space, can excite electromagnetic modes in the plasma near the beam gyrofrequency. It excites left-hand-polarized shear Alfven waves and their harmonics via the coupling of Alfven modes with the beam modes. It can also excite right-hand-polarized fast-mode magnetosonic waves and their harmonics as well. The excitation is possible for beam ions heavier than the plasma ions. The growth rate varies as one-third power of the beam density and decreases with the angle of wave propagation with respect to the ambient magnetic field. The nonlocality has a stabilizing effect on the instability. The predicted values of the wave frequencies compare reasonably well with those observed in satellite data.
Patel Vithal L.
Sharma O. P.
No associations
LandOfFree
Low-frequency electromagnetic waves driven by gyrotropic gyrating ion beams does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Low-frequency electromagnetic waves driven by gyrotropic gyrating ion beams, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Low-frequency electromagnetic waves driven by gyrotropic gyrating ion beams will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1676612