scholarly journals Energetic particle modes of q = 1 high-order harmonics in tokamak plasmas with monotonic weak magnetic shear

2017 ◽  
Vol 24 (5) ◽  
pp. 052501 ◽  
Author(s):  
Zhen-Zhen Ren ◽  
Feng Wang ◽  
G. Y. Fu ◽  
Wei Shen ◽  
Zheng-Xiong Wang
Keyword(s):  
Energetic Particle ◽  
High Order ◽  
Tokamak Plasmas ◽  
Magnetic Shear

Long-lasting energetic particle modes in tokamak plasmas with low magnetic shear

2014 ◽  
Vol 56 (9) ◽  
pp. 095007 ◽  
Author(s):  
Rui-Bin Zhang ◽  
Xian-Qu Wang ◽  
Chi-Jie Xiao ◽  
Xiao-Gang Wang ◽  
Yi Liu ◽  
...  
Keyword(s):  
Energetic Particle ◽  
Tokamak Plasmas ◽  
Magnetic Shear

Energetic-ion excited internal kink modes with weak magnetic shear in ${{\boldsymbol{q}}}_{0}\gt 1$ tokamak plasmas

2017 ◽  
Vol 26 (8) ◽  
pp. 085201
Author(s):  
Wen-Ming Chen ◽  
Xiao-Gang Wang ◽  
Xian-Qu Wang ◽  
Rui-Bin Zhang
Keyword(s):  
Tokamak Plasmas ◽  
Magnetic Shear

Non-resonant fishbone-like modes in tokamak plasmas with reversed magnetic shear

2016 ◽  
Vol 56 (3) ◽  
pp. 036024
Author(s):  
Xian-Qu Wang ◽  
Xiao-Gang Wang
Keyword(s):  
Tokamak Plasmas ◽  
Magnetic Shear

Double fishbone instability excited by energetic ions with m = n = 1 in a reversed magnetic shear tokamak plasmas

2015 ◽  
Vol 22 (9) ◽  
pp. 092510 ◽  
Author(s):  
Guo Meng ◽  
Xian-Qu Wang ◽  
Xiaogang Wang ◽  
Rui-Bin Zhang
Keyword(s):  
Tokamak Plasmas ◽  
Magnetic Shear ◽  
Energetic Ions

TEM in toroidal plasmas with anisotropic electron temperature

2021 ◽  
Author(s):  
Yao yao ◽  
Songfen Liu ◽  
Kaien Zhu ◽  
Wei Kong ◽  
Jiquan Li ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Electron Temperature ◽  
Tokamak Plasmas ◽  
Magnetic Shear ◽  
Direction Parallel ◽  
Toroidal Plasmas ◽  
Electrons And Ions ◽  
Effective Reduction ◽  
Trapped Electron ◽  
The Magnetic Field

Abstract Trapped electron modes (TEMs) in tokamak plasmas with anisotropies of electron temperature and its gradient are studied by solving the gyrokinetic integral eigenmode equation. Detailed numerical analyses indicate that, in comparison with that in plasmas of isotropic electron temperature, TEMs are enhanced (weakened) by the anisotropy with temperature in the direction perpendicular to magnetic field higher (lower) than that in the direction parallel to the magnetic field when the latter is kept constant. However, the enhancement is limited such that TEMs are weakened rapidly and even stabilized when the anisotropy is higher than a critic value owing to an effective reduction of bounce movement of the trapped electrons. In addition, it is found that the gradients of perpendicular and parallel temperatures of electrons have driving and suppressing effects on the TEMs, respectively. The overall effects of the temperature gradients of electrons and ions, magnetic shear, safety factor, density gradient on TEMs in the presence of the anisotropies are presented in detail.

Local magnetic shear in tokamak plasmas

1995 ◽  
Vol 37 (11) ◽  
pp. 1199-1205 ◽  
Author(s):  
J L V Lewandowski ◽  
M Persson
Keyword(s):  
Tokamak Plasmas ◽  
Magnetic Shear
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