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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Measurement of the damping rate of n = 1 toroidal Alfvén eigenmodes as a function of the neutral beam heating power and plasma β on JET
TL;DR: In this article, the dependence of the measured damping rate upon the neutral beam heating power (P-NBI) and plasma beta has been experimentally investigated for n = 1 toroidal Alfven eigenmodes (TAEs) in JET limiter plasmas with a monotonic safety factor profile and low edge magnetic shear.
Journal ArticleDOI
A comparison of measured and calculated toroidal Alfvén eigenmode damping rates in Alcator C-Mod
TL;DR: In this paper, the damping rate of stable toroidal Alfv?n eigenmodes (TAEs) was compared with damping rates calculated with the NOVA-K code for a number of experimental conditions on Alcator C-Mod.
Journal ArticleDOI
Gyrokinetic investigation of Alfvén instabilities in the presence of turbulence
Alessandro Biancalani,Alessandro Biancalani,A. Bottino,A. Di Siena,Özgür D. Gürcan,T. Hayward-Schneider,Frank Jenko,Ph. Lauber,Alexey Mishchenko,Pierre Morel,I. Novikau,F. Vannini,Laurent Villard,Alessandro Zocco +13 more
TL;DR: In this paper, the nonlinear dynamics of beta-induced Alfven eigenmodes (BAEs) driven by energetic particles (EPs) in the presence of ion-temperature-gradient turbulence is investigated, by means of selfconsistent global gyrokinetic simulations and analytical theory.
Journal ArticleDOI
Energetic particle physics in JET
S. Sharapov,B. Alper,D. N. Borba,L.-G. Eriksson,Ambrogio Fasoli,R.D. Gill,A. Gondhalekar,C. Gormezano,R.F. Heeter,G. T. A. Huysmans,J. Jacquinot,A. Korotkov,Ph. Lamalle,M. J. Mantsinen,D. C. McDonald,F. G. Rimini,D. Start,D. Testa,P.R. Thomas,Jet Team +19 more
TL;DR: In this article, the stability of alpha particle driven Alfv?n eigenmodes (AEs) in the highest fusion power ELM-free H mode discharges is shown to be consistent with the existing theoretical analysis for AEs.
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.
Journal ArticleDOI
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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