Amplification of ion acoustic wave in an inhomogeneous plasma through nonlinear wave-particle interaction with drift wave turbulence

A study on the amplification of ion acoustic wave in an inhomogeneous plasma has been made on the basis of a nonlinear wave-particle interaction process called plasma maser effect. The drift wave instability, which is a universal phenomenon of an inhomogeneous confined plasma system, is found to be...

Full description

Saved in:
Bibliographic Details
Published in:Physics of plasmas 2011-04, Vol.18 (4), p.042311-042311-8
Main Authors: Deka, P. N., Borgohain, A.
Format: Article
Language:English
Subjects:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
AMPLIFICATION
CONFINEMENT
DISPERSION RELATIONS
DISTRIBUTION FUNCTIONS
DRIFT INSTABILITY
FUNCTIONS
INHOMOGENEOUS PLASMA
INSTABILITY
INTERACTIONS
ION ACOUSTIC WAVES
ION WAVES
MAGNETIC CONFINEMENT
NONLINEAR PROBLEMS
PARTICLE INTERACTIONS
PLASMA
PLASMA CONFINEMENT
PLASMA INSTABILITY
PLASMA MICROINSTABILITIES
PLASMA WAVES
TURBULENCE
WAVE PROPAGATION
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A study on the amplification of ion acoustic wave in an inhomogeneous plasma has been made on the basis of a nonlinear wave-particle interaction process called plasma maser effect. The drift wave instability, which is a universal phenomenon of an inhomogeneous confined plasma system, is found to be strongly in phase relation with thermal particles and may transfer its wave energy nonlinearly through a modulated field to ion acoustic wave. Considering a Maxwellian distribution function model for inhomogeneous plasmas under the standard local approximation, we have estimated the growth rate for ion acoustic wave, which is obtained by using the nonlinear dispersion relation. It has been found that amplification of ion acoustic wave is possible at the expense of drift wave turbulent energy. This result may be particularly important for stability of various drift modes in magnetically confined plasma as well as for transport of momentum and energy in such inhomogeneous systems.
ISSN:1070-664X
1089-7674
DOI:10.1063/1.3578365