On nonlinear physics of shear Alfvén waves

Chen, Liu; Zonca, Fulvio

doi:10.1063/1.4804628

On nonlinear physics of shear Alfvén waves

Journal Article · Wed May 01 04:00:00 EDT 2013 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4804628· OSTI ID:1130748

Chen, Liu ^[1]; Zonca, Fulvio ^[2]

Zhejiang Univ., Hangzhou (China); Univ. of California, Irvine, CA (United States); University of California, Irvine
Associazione EURATOM-ENEA sulla Fusione, Frascati (Italy); Zhejiang Univ., Hangzhou (China)

Shear Alfvén waves (SAW) are electromagnetic oscillations prevalent in laboratory and nature magnetized plasmas. Due to their anisotropic nature, it is well known that the linear wave propagation and dispersiveness of SAW are fundamentally affected by plasma nonuniformities and magnetic field geometries, such as the existence of continuous spectrum, spectral gaps, and discrete eigenmodes in toroidal plasmas. This work discusses the pure Alfvénic state and demonstrates the crucial roles that finite ion compressibility, non-ideal kinetic effects, and geometry play in breaking it and, thereby, the nonlinear physics of SAW wave-wave interactions.

Research Organization:: Univ. of California, Irvine, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Fusion Energy Sciences (FES)

DOE Contract Number:: FG02-04ER54736

OSTI ID:: 1130748

Report Number(s):: DOE-UCI--ER54736

Journal Information:: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 5 Vol. 20; ISSN 1070-664X

Publisher:: American Institute of Physics (AIP)

Country of Publication:: United States

Language:: English

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