Accession Number : ADA133975

Title :   Electrostatic Ion-Cyclotron Waves in Magnetospheric Plasmas: Non-Local Aspects.

Descriptive Note : Memorandum rept.,

Corporate Author : NAVAL RESEARCH LAB WASHINGTON DC

Personal Author(s) : Ganguli,G ; Bakshi,P ; Palmadesso,P

PDF Url : ADA133975

Report Date : 14 Oct 1983

Pagination or Media Count : 36

Abstract : 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 or = Ls/10 the growth rate is not much altered from its local value, however for Lc/pi i 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.

Descriptors :   *Cyclotron waves, *Magnetohydrodynamics, Electrostatic charge, Magnetosphere, Ion beams, Stability, Plasma waves

Subject Categories : Plasma Physics and Magnetohydrodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE