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IJRSP Vol.37(1) [February 2008] >


Title: Effect of dust particles on two-stream instability: A possible explanation for the persistence of ionization trails of Leonid meteor showers
Authors: Kulkarni, V H
Muralikrishna, P
Keywords: Ionization trails
Leonid meteor showers
Meteor showers
Collisional plasma
Issue Date: Feb-2008
Publisher: CSIR
Abstract: Assuming a collisional plasma having dust particles and only electrons are magnetized, the two-stream instability is studied for the excitation of low frequency waves. The production and losses of both ions and electrons are included. In the absence of production, it is shown that losses by attachments of both ions and electrons on dust particles, two-stream instability require the drift velocity greater than ion acoustic velocity. The growth rate is reduced and the wave amplitude at saturation is reduced. Therefore the generation and magnitudes of ionization density irregularities is reduced. It is expected that the cross-field diffusion of ionization due to wave turbulence is affected. It is known that during meteor shower periods the E-region of the ionosphere has a significant number of dust particles. Therefore density irregularities in the ionosphere are modified. Also amplitude dependent diffusion rate is reduced. It is suggested that the presence of dust particles may be a reason for persistence of ionization trails seen for longer periods during Leonid meteor showers
Page(s): 34-38
ISSN: 0367-8393
Source:IJRSP Vol.37(1) [February 2008]

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