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Title: Relation between shear-zone thickness, boundary layer instability and plasmoids in geomagnetosphere
Authors: Renuka, G
Raji, R
Sindhu, M S
Venugopal, C
Keywords: Plasmoid;Kelvin-Helmholtz instability;Tearing mode instability;Shear-zone thickness;Geomagnetotail
Issue Date: Apr-2004
Publisher: NISCAIR-CSIR, India
PACS No.: 52.35. Py
Abstract: A study of the dependence of shear-zone thickness on the growth rate and frequency of Kelvin-Helmholtz instability (KHI) in the shear-zone between low latitude boundary layer (LLBL) and central plasma sheet (CPS) is carried out. It is found that the growth rate and frequency are maximum for a shear-zone of minimum thickness. The amplitude of plasma sheet (PS) oscillation is found to be positive as the PS thickness increases and is maximum when PS thickness is 2RE (1RE=6378 km) for a shear-zone of minimum thickness. This perturbation generates tearing mode instability (TMI) which leads to the formation of plasmoids.
Page(s): 99-103
ISSN: 0975-105X (Online); 0367-8393 (Print)
Appears in Collections:IJRSP Vol.33(2) [April 2004]

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