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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Observation of fast-ion Doppler-shifted cyclotron resonance with shear Alfvén waves
Yang Zhang,W. W. Heidbrink,H. Boehmer,Roger McWilliams,Stephen Vincena,Troy Carter,Walter Gekelman,D. Leneman,Patrick Pribyl +8 more
TL;DR: The Doppler-shifted cyclotron resonance between fast ions and shear Alfven waves is experimentally investigated in this paper, where a collimated fast-ion energy analyzer measures the nonclassical spreading of the beam, which is proportional to the resonance with the wave.
Journal ArticleDOI
Nonlinear excitation of finite-radial-scale zonal structures by toroidal Alfvén eigenmode
TL;DR: In this paper, a set of equations describing nonlinear evolution of a single toroidal Alfven eigenmode are derived, including both zero frequency zonal structure (ZFZS) generation and wave-particle phase space nonlinearities.
Journal ArticleDOI
Alfvén eigenmodes including magnetic island effects in the TJ-II stellarator
TL;DR: In this paper, the authors explain coherent modes in NBI-heated plasmas of the TJ-II stellarator at frequencies generally below those of helicity induced Alfven eigenmodes by a non-rotating magnetic island (MIAE).
Journal ArticleDOI
Nonlinear mode coupling induced high frequency axisymmetric mode on the HL-2A tokamak
P.W. Shi,Zhiyong Qiu,W. Chen,Zhongbing Shi,X.R. Duan,G.L. Xiao,X.Q. Ji,Z.C. Yang,Wulyu Zhong,M. Jiang,Liming Yu,L.G. Zang,R.R. Ma,J. Wen,K.R. Fang,Yi Liu,Q.W. Yang,M. Xu +17 more
TL;DR: Chen et al. as mentioned in this paper presented experimental observations and theoretical interpretations for the high and low frequency axisymmetric mode driven by nonlinear mode coupling and demonstrated the nonlinear process leading to high frequency n E = 0 mode generation using nonlinear gyrokinetic theory.
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Recent JET experiments on Alfvén eigenmodes with intermediate toroidal mode numbers: measurements and modelling of n = 3 toroidal Alfvén eigenmodes with the TAEFL code
Duccio Testa,Donald A. Spong,T. Panis,Patrick Blanchard,Ambrogio Fasoli,Jet-Efda Contributors +5 more
TL;DR: In this article, the authors report the results of recent experiments performed on the JET tokamak on Alfven eigenmodes (AEs) with toroidal mode number (n) in the range n = 3-15.
References
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Journal ArticleDOI
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.
Journal ArticleDOI
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.
Journal ArticleDOI
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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