High- n ideal and resistive shear Alfvén waves in tokamaks
TLDR
In this paper, the ideal and resistive MHD equations for the shear Alfven waves are studied in a low-β toroidal model by employing the high-n ballooning formalism.About:
This article is published in Annals of Physics.The article was published on 1985-04-15 and is currently open access. It has received 450 citations till now. The article focuses on the topics: Resistive touchscreen.read more
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High frequency mode generation by toroidal Alfvén eigenmodes
TL;DR: In this article, the nonlinear generation of high frequency modes (HFMs) by the toroidal Alfven eigenmode (TAE) observed in the HL-2A tokamak is analyzed using nonlinear gyrokinetic theory.
Journal ArticleDOI
Nonlinear evolution of alpha‐particle‐driven Alfvén turbulence from a reduced model
F. Wising,F. Y. Gang +1 more
TL;DR: In this article, the coupled nonlinear evolution of kinetic Alfven turbulence (KAW) and anomalous alpha-particle transport is analyzed using a reduced turbulence model, where the alpha spectrum consists of two well separated peaks, one linearly unstable and one in the stable regime.
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Discrete Alfvén Eigenmodes in ITER Plasmas with Bootstrap Current
TL;DR: This work focuses on the relationship between αTAEs and bootstrap current with a magnetohydrodynamic (MHD) simulation code and a gyrokinetic-MHD hybrid simulation code in two typical scenarios in ITER, and compares these typical scenarios with two ordinary scenarios about physical characteristics of discrete Alfvén eigenmodes.
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Testing the conservative character of particle simulations: II. Spurious heating of guiding centers and full orbits subject to fluctuations expressed in terms of E and B
Andreas Bierwage,Kouji Shinohara +1 more
TL;DR: In this paper , the authors show that anomalous heating can be caused by nonnormal modes that possess strong up-down asymmetry instead of the usual in-out asymmetry of normal toroidal (eigen) modes.
Shear Alfv'en wave continuous spectrum in the presence of a magnetic island
Alessandro Biancalani,Liu Chen,Francesco Pegoraro,Fulvio Zonca,S.V. Annibaldi,A. Botrugno,P. Buratti P. Smeulders +6 more
TL;DR: In this article, the continuous spectrum of shear Alfvén waves is calculated for a finite-beta tokamak equilibrium in the presence of a finite size magnetic island.
References
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Finite‐Resistivity Instabilities of a Sheet Pinch
TL;DR: In this paper, the stability of a plane current layer is analyzed in the hydromagnetic approximation, allowing for finite isotropic resistivity, and the effect of a small layer curvature is simulated by a gravitational field.
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Resistive instabilities in general toroidal plasma configurations
TL;DR: In this article, the Mercier criterion for the stability of the ideal magnetohydrodynamic interchange mode is derived, the generalization of the earlier stability criterion for resistive interchange mode was obtained, and a relation between the two was noted.
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A theory of long‐period magnetic pulsations: 2. Impulse excitation of surface eigenmode
Liu Chen,Akira Hasegawa +1 more
TL;DR: In this paper, a wave equation that shows a coupling between a surface wave and a shear Alfven wave is derived, and a theory of long-period magnetic pulsations (Pc 3 to Pc 5) is presented as an initial value problem to explain impulse-excited pulsations.
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Decay of MHD waves by phase mixing
J. Tataronis,W. Grossmann +1 more
TL;DR: In this article, the authors examined the dispersion relation for plasmas with non-uniform profiles and compared the results with those of a sharp boundary model, showing that the frequency of the waves is a complex quantity having a real and imaginary part.
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Kinetic-ballooning-mode theory in general geometry
TL;DR: In this article, a systematic procedure for studying the influence of kinetic effects on the stability of MHD ballooning modes is presented, which includes effects due to finite gyroradius, trapped particles, and wave-particle resonances.
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