Existence of weakly damped kinetic Alfvén eigenmodes in reversed shear tokamak plasmas

2008 ◽  
Vol 15 (11) ◽  
pp. 110701 ◽  
Author(s):  
N. N. Gorelenkov
Keyword(s):  
Tokamak Plasmas ◽  
Alfven Eigenmodes ◽  
Reversed Shear

Global kinetic-MHD simulations of downward-sweeping reversed shear Alfvén eigenmodes in tokamak plasmas

2021 ◽  
Vol 61 (11) ◽  
pp. 116037
Author(s):  
Wanling Ge ◽  
Jialei Wang ◽  
Feng Wang ◽  
Zheng-Xiong Wang
Keyword(s):  
Tokamak Plasmas ◽  
Mhd Simulations ◽  
Alfven Eigenmodes ◽  
Reversed Shear

Radially localized kinetic beta induced Alfven eigenmodes in tokamak plasmas

2016 ◽  
Vol 23 (12) ◽  
pp. 122515 ◽  
Author(s):  
H. Rizvi ◽  
A. Panwar ◽  
M. Shahzad ◽  
C. M. Ryu
Keyword(s):  
Tokamak Plasmas ◽  
Alfven Eigenmodes

scholarly journals Effect of the electron redistribution on the nonlinear saturation of Alfvén eigenmodes and the excitation of zonal flows

2020 ◽  
Vol 86 (3) ◽  
Author(s):  
A. Biancalani ◽  
A. Bottino ◽  
P. Lauber ◽  
A. Mishchenko ◽  
F. Vannini
Keyword(s):  
Magnetic Field ◽  
Zonal Flow ◽  
Large Aspect Ratio ◽  
Nonlinear Saturation ◽  
Energetic Ions ◽  
Electron Population ◽  
Zonal Flows ◽  
Particle In Cell ◽  
Alfven Eigenmodes ◽  
Reversed Shear

Numerical simulations of Alfvén modes driven by energetic particles are performed with the gyrokinetic (GK) global particle-in-cell code ORB5. A reversed shear equilibrium magnetic field is adopted. A simplified configuration with circular flux surfaces and large aspect ratio is considered. The nonlinear saturation of beta-induced Alfvén eigenmodes (BAE) is investigated. The roles of the wave–particle nonlinearity of the different species, i.e. thermal ions, electrons and energetic ions are described, in particular for their role in the saturation of the BAE and the generation of zonal flows. The nonlinear redistribution of the electron population is found to be important in increasing the BAE saturation level and the zonal flow amplitude.

Nonlinear simulation of multiple toroidal Alfvén eigenmodes in tokamak plasmas

2020 ◽  
Vol 29 (2) ◽  
pp. 025201
Author(s):  
Xiao-Long Zhu ◽  
Feng Wang ◽  
Zheng-Xiong Wang
Keyword(s):  
Tokamak Plasmas ◽  
Nonlinear Simulation ◽  
Alfven Eigenmodes

scholarly journals Convective beam ion losses due to Alfvén eigenmodes in DIII-D reversed-shear plasmas

2011 ◽  
Vol 53 (6) ◽  
pp. 062001 ◽  
Author(s):  
D C Pace ◽  
R K Fisher ◽  
M García-Muñoz ◽  
W W Heidbrink ◽  
M A Van Zeeland
Keyword(s):  
Alfven Eigenmodes ◽  
Reversed Shear

scholarly journals Observation of Reversed Shear Alfvén Eigenmodes between Sawtooth Crashes in the Alcator C-Mod Tokamak

2009 ◽  
Vol 102 (16) ◽  
Author(s):  
E. M. Edlund ◽  
M. Porkolab ◽  
G. J. Kramer ◽  
L. Lin ◽  
Y. Lin ◽  
...  
Keyword(s):  
Alfven Eigenmodes ◽  
Sawtooth Crashes ◽  
Reversed Shear
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