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Nonlinear interaction of electron acoustic waves with Langmuir waves in presence of magnetic field in plasmas

Published online by Cambridge University Press:  21 July 2014

Manjistha Dutta ,
Manoranjan Khan  and
Nikhil Chakrabarti
Manjistha Dutta*
Affiliation:
Department of Instrumentation Science, Jadavpur University, Kolkata 700 032, India
Manoranjan Khan
Affiliation:
Department of Instrumentation Science, Jadavpur University, Kolkata 700 032, India
Nikhil Chakrabarti
Affiliation:
Saha Institute of Nuclear Physics, 1/AF Bidhannagar, Calcutta 700 064, India
*
†Email address for correspondence: [email protected]
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Abstract

Nonlinear interaction between Langmuir waves and Electron Acoustic Wave (EAW) is being studied in a warm magnetized plasma in presence of two intermingled fluids, hot electrons, and cold electrons while ions forming static background. Two-fluid, two-timescale theory is performed to derive modified Zakharov's equations in a magnetized plasma. These coupled equations describe low-frequency response of electron density due to high-frequency electric field along with magnetic field perturbations. Linear analysis shows coupling between acoustic mode, upper hybrid mode, and cyclotron modes. These modes are found to be modified due to the presence of two electron components. These equations are significant in the context of weak and strong turbulence.

Type
Research Article
Information
Journal of Plasma Physics , Volume 81 , Issue 1 , January 2015 , 905810106
Copyright
Copyright © Cambridge University Press 2014 

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