Fine structure zonal flow excitation by beta-induced Alfvén eigenmode
نویسندگان
چکیده
منابع مشابه
Nonlinear dynamics of beta-induced Alfvén eigenmode driven by energetic particles.
Nonlinear saturation of a beta-induced Alfvén eigenmode, driven by slowing down energetic particles via transit resonance, is investigated by the nonlinear hybrid magnetohyrodynamic gyrokinetic code. Saturation is characterized by frequency chirping and symmetry breaking between co- and counter-passing particles, which can be understood as the evidence of resonance detuning. The scaling of the ...
متن کاملNonlinear excitations of zonal structures by toroidal Alfvén eigenmodes.
Zonal flows and, more generally, zonal structures are known to play important self-regulatory roles in the dynamics of microscopic drift-wave-type turbulences. Since toroidal Alfvén eigenmode (TAE) plays crucial roles in the Alfvén wave instabilities in burning fusion plasmas, it is, thus, important to understand and assess the possible roles of zonal flow and structures on the nonlinear dynami...
متن کاملSuppressing Flow-induced Vibrations by Parametric Excitation
The possibility of suppressing self-excited vibrations of mechanical systems using parametric excitation is discussed. We consider a two-mass system of which the main mass is excited by a ow-induced, self excited force. A single mass which acts as a dynamic absorber is attached to the main mass and, by varying the stiiness between the main mass and the absorber mass, represents a parametric exc...
متن کاملNonlinear dynamics of beta-induced Alfv en eigenmode in tokamak
H. S. Zhang, Z. Lin, W. Deng, I. Holod, Z. X. Wang, Y. Xiao, and W. L. Zhang Fusion Simulation Center, Peking University, Beijing 100871, China Department of Physics and Astronomy, University of California, Irvine, California 92697, USA Institute for Fusion Theory and Simulation, Zhejiang University, Hangzhou 310027, China CAS Key Laboratory of Plasma Physics, University of Science and Technolo...
متن کاملFine-Scale Zonal Flow Suppression of Electron Temperature Gradient Turbulence
Abstract. It is found in collisionless Electron Temperature Gradient (ETG) turbulence simulations that, while zonal flows are weak at early times, the zonal flows continue to grow algebraically (proportional to time). These fine-scale zonal flows have a radial wave number such that krρi > 1 and krρe < 1. Eventually, the zonal flows grow to a level that suppresses the turbulence due to ExB shear...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Nuclear Fusion
سال: 2016
ISSN: 0029-5515,1741-4326
DOI: 10.1088/0029-5515/56/10/106013