Electrostatic ion-cyclotron waves in magnetospheric plasmas Nonlocal aspects

Details Electrostatic ion-cyclotron waves in magnetospheric plasmas Nonlocal aspects Electrostatic ion-cyclotron waves in magnetospheric plasmas Nonlocal aspects

Feb 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984jgr....89..945g&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 89, Feb. 1, 1984, p. 945-952. Navy-NASA-supported research.

Physics

10

Cyclotron Radiation, Electrostatic Charge, Ion Beams, Magnetohydrodynamic Stability, Magnetospheric Instability, Plasma Waves

Scientific paper

The importance of the effect of the magnetic shear and the finite size of current channel on the electrostatic ion-cyclotron instability for the space plasmas is illustrated. A non-local treatment is used. When the channel width Lc, is larger than the shear length Ls, there is a large reduction in the growth rate along with a noteworthy reduction of the band of the unstable perpendicular wavelengths. For Lc less than or = Ls/10 the growth rate is not much altered from its local value, however for Lc/pi i less than or = 10 to the second power the growth rate starts falling below the local value and vanishes for Lc pi i. The non-local effects lead to enhanced coherence in the ion cyclotron waves. Previously announced in STAR as N84-14917

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