scholarly journals Effect of nonlinear energy transport on neoclassical tearing mode stability in tokamak plasmas

2017 ◽  
Vol 24 (5) ◽  
pp. 052504 ◽  
Author(s):  
Richard Fitzpatrick
Keyword(s):  
Energy Transport ◽  
Tokamak Plasmas ◽  
Tearing Mode ◽  
Mode Stability ◽  
Neoclassical Tearing Mode ◽  
Nonlinear Energy

scholarly journals Tearing-mode stability of tokamak plasmas with elliptical cross-section

1981 ◽  
Vol 21 (5) ◽  
pp. 511-517 ◽  
Author(s):  
B.A. Carreras ◽  
J.A. Holmes ◽  
H.R. Hicks ◽  
V.E. Lynch
Keyword(s):  
Cross Section ◽  
Elliptical Cross Section ◽  
Tokamak Plasmas ◽  
Tearing Mode ◽  
Elliptical Cross ◽  
Mode Stability

scholarly journals Tearing mode stability of tokamak plasmas with elliptical cross section

1981 ◽  
Author(s):  
B. A. Carreras ◽  
J. A. Holmes ◽  
H. R. Hicks ◽  
V. E. Lynch
Keyword(s):  
Cross Section ◽  
Elliptical Cross Section ◽  
Tokamak Plasmas ◽  
Tearing Mode ◽  
Elliptical Cross ◽  
Mode Stability

Prevention of ECCD triggering explosive bursts in reversed magnetic shear tokamak plasmas for disruption avoidance

2022 ◽  
Author(s):  
Tong Liu ◽  
Zheng-Xiong Wang ◽  
Lai Wei ◽  
Jialei Wang
Keyword(s):  
Control Strategies ◽  
Control Process ◽  
Rational Surface ◽  
Current Drive ◽  
Tokamak Plasmas ◽  
Tearing Mode ◽  
Magnetic Shear ◽  
Rational Surfaces ◽  
Major Disruption ◽  
Neoclassical Tearing Mode

Abstract The explosive burst excited by neoclassical tearing mode (NTM) is one of the possible candidates of disruptive terminations in reversed magnetic shear (RMS) tokamak plasmas. For the purpose of disruption avoidance, numerical investigations have been implemented on the prevention of explosive burst triggered by the ill-advised application of electron cyclotron current drive (ECCD) in RMS configuration. Under the situation of controlling NTMs by ECCD in RMS tokamak plasmas, a threshold in EC driven current has been found. Below the threshold, not only are the NTM islands not effectively suppressed, but also a deleterious explosive burst could be triggered, which might contribute to the major disruption of tokamak plasmas. In order to prevent this ECCD triggering explosive burst, three control strategies have been attempted in this work and two of them have been recognized to be effective. One is to apply differential poloidal plasma rotation in the proximity of outer rational surface during the ECCD control process; The other is to apply two ECCDs to control NTM islands on both rational surfaces at the same time. In the former strategy, the threshold is diminished due to the modification of classical TM index. In the latter strategy, the prevention is accomplished as a consequence of the reduction of the coupling strength between the two rational surfaces via the stabilization of inner islands. Moreover, the physical mechanism behind the excitation of the explosive burst and the control processes by different control strategies have all been discussed in detail.

scholarly journals The spontaneous destabilization of neoclassical tearing mode with existing energetic ions in low torque tokamak plasmas

2017 ◽  
Vol 57 (11) ◽  
pp. 114005
Author(s):  
Erzhong Li ◽  
L. Hu ◽  
H. Zhao ◽  
T. Shi ◽  
Y. Liu ◽  
...  
Keyword(s):  
Tokamak Plasmas ◽  
Tearing Mode ◽  
Energetic Ions ◽  
Low Torque ◽  
Neoclassical Tearing Mode

scholarly journals Modeling of Neoclassical Tearing Mode Stability for Generalized Toroidal Geometry

2002 ◽  
Author(s):  
A.L. Rosenberg ◽  
D.A. Gates ◽  
A. Pletzer ◽  
J.E. Menard ◽  
S.E. Kruger ◽  
...  
Keyword(s):  
Tearing Mode ◽  
Mode Stability ◽  
Neoclassical Tearing Mode ◽  
Toroidal Geometry

scholarly journals Modeling of neoclassical tearing mode stability for generalized toroidal geometry

2002 ◽  
Vol 9 (11) ◽  
pp. 4567-4572 ◽  
Author(s):  
A. L. Rosenberg ◽  
D. A. Gates ◽  
A. Pletzer ◽  
J. E. Menard ◽  
S. E. Kruger ◽  
...  
Keyword(s):  
Tearing Mode ◽  
Mode Stability ◽  
Neoclassical Tearing Mode ◽  
Toroidal Geometry
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