Nonlinear interaction of kinetic Alfven wave and whistler: Turbulent spectra and anisotropic scaling

Journal Article · Mon Apr 15 04:00:00 EDT 2013 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4802988· OSTI ID:22130441

Kumar Dwivedi, Navin; Sharma, R. P. ^[1]

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1. Centre for Energy Studies, Indian Institute of Technology, Delhi 110016 (India)

In this work, we are presenting the excitation of oblique propagating whistler wave as a consequence of nonlinear interaction between whistler wave and kinetic Alfven wave (KAW) in intermediate beta plasmas. Numerical simulation has been done to study the transient evolution of magnetic field structures of KAW when the nonlinearity arises due to ponderomotive effects by taking the adiabatic response of the background density. Weak oblique propagating whistler signals in these nonlinear plasma density filaments (produced by KAW localization) get amplified. The spectral indices of the power spectrum at different times are calculated with given initial conditions of the simulations. Anisotropic scaling laws for KAW and whistlers are presented. The relevance of the present investigation to solar wind turbulence and its acceleration is also pointed out.

• OSTI ID: 22130441
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 4 Vol. 20; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ALFVEN WAVES
ANISOTROPY
COMPUTERIZED SIMULATION
INTERACTIONS
MAGNETIC FIELDS
NONLINEAR PROBLEMS
NUMERICAL ANALYSIS
PLASMA DENSITY
PLASMA SIMULATION
PONDEROMOTIVE FORCE
SCALING LAWS
SIGNALS
SOLAR WIND
SPECTRA
TURBULENCE
WHISTLERS