Nonlinear coupling of reversed shear Alfven eigenmode and toroidal Alfven eigenmode during current ramp
Reads0
Chats0
TLDR
In this paper, two nonlinear mode coupling processes for reversed shear Alfven eigenmode (RSAE) nonlinear saturation are proposed and investigated, and the condition for the two processes to occur is favored during current ramp.Abstract:
Two novel nonlinear mode coupling processes for reversed shear Alfven eigenmode (RSAE) nonlinear saturation are proposed and investigated. In the first process, RSAE nonlinearly couples to a co-propagating toroidal Alfven eigenmode (TAE) with the same toroidal and poloidal mode numbers, and generates a geodesic acoustic mode (GAM). In the second process, RSAE couples to a counter-propagating TAE and generates an ion acoustic wave quasi-mode (IAW). The condition for the two processes to occur is favored during current ramp. Both processes contribute to effectively saturate the Alfvenic instabilities, as well as nonlinearly transfer of energy from energetic fusion alpha particles to fuel ions in burning plasmas.read more
Citations
More filters
Journal ArticleDOI
Fractionalized conductivity and emergent self-duality near topological phase transitions
TL;DR: The study of a strongly correlated quantum phase transition between a topological state shows that the universal conductivity at the quantum critical point becomes a simple fraction of its value at the conventional insulator-to-superfluid transition, indicating the presence of the elusive vison particles.
Journal ArticleDOI
A simulation study of a windowless gas-stripping room in an E//B neutral particle analyzer
Yuan Luo,Wei-Ping Lin,P. Ren,Guo-Feng Qu,Jingjun Zhu,Xing-Quan Liu,Xiao-Bing Luo,Zhu An,R. Wada,R. Wada,L. Zang,Yu-Fan Qu,Zhongbing Shi +12 more
TL;DR: In this article, a windowless gas-stripping room with two differential pipes has been constructed in a parallel electric and magnetic fields (E/B) neutral particle analyzer (NPA) in a Tokamak facility.
References
More filters
Journal ArticleDOI
Nonlinear gyrokinetic equations for low-frequency electromagnetic waves in general plasma equilibria
E. A. Frieman,Liu Chen +1 more
TL;DR: A nonlinear gyrokinetic formalism for low-frequency (less than the cyclotron frequency) microscopic electromagnetic perturbations in general magnetic field configurations is developed in this paper.
Journal ArticleDOI
Shear, periodicity, and plasma ballooning modes
TL;DR: In this article, a procedure which reconciles long parallel wavelength, characteristic of plasma instabilities, with periodicity in a sheared toroidal magnetic field is described and applied to the problem of high-n$ ballooning modes in tokamaks.
Journal ArticleDOI
Geodesic Acoustic Waves in Hydromagnetic Systems
TL;DR: In toroidal systems with geodesic curvature, an electrostatic acoustic mode occurs with plasma motion in the magnetic surfaces, perpendicular to the field as discussed by the authors, and this mode should dominate ordinary sound waves associated with motion along the field.
Nonlinear gyrokinetic equations for low-frequency electromagnetic waves in general plasma equilibria
E. A. Frieman,Liu Chen +1 more
TL;DR: A nonlinear gyrokinetic formalism for low-frequency (less than the cyclotron frequency) microscopic electromagnetic perturbations in general magnetic field configurations is developed in this paper.
Journal ArticleDOI
Chapter 5: Physics of energetic ions
Ambrogio Fasoli,C. Gormenzano,Herbert L Berk,Boris Breizman,Sergio Briguglio,D. S. Darrow,Nikolai Gorelenkov,W. W. Heidbrink,A. Jaun,Sergey Konovalov,Raffi Nazikian,J.-M. Noterdaeme,S. E. Sharapov,Kouji Shinohara,Duccio Testa,Kenji Tobita,Yasushi Todo,Gregorio Vlad,Fulvio Zonca +18 more
TL;DR: A review of the progress accomplished since the redaction of the first ITER Physics Basis (1999 Nucl Fusion 39 2137-664) in the field of energetic ion physics and its possible impact on burning plasma regimes is presented in this paper.
Related Papers (5)
Parallel equilibrium current effect on existence of reversed shear Alfvén eigenmodes
Huasheng Xie,Yong Xiao +1 more