Effect of a nonuniform resistive wall on the stability of tokamak plasmas

1994 ◽  
Vol 1 (9) ◽  
pp. 2931-2939 ◽  
Author(s):  
Richard Fitzpatrick
Keyword(s):  
Tokamak Plasmas ◽  
Resistive Wall ◽  
The Stability

Comprehensive control of resistive wall modes in DIII-D advanced tokamak plasmas

2009 ◽  
Vol 49 (12) ◽  
pp. 125003 ◽  
Author(s):  
M. Okabayashi ◽  
I.N. Bogatu ◽  
M.S. Chance ◽  
M.S. Chu ◽  
A.M. Garofalo ◽  
...  
Keyword(s):  
Tokamak Plasmas ◽  
Resistive Wall ◽  
Resistive Wall Modes

Control of resistive wall modes in tokamak plasmas

2014 ◽  
Vol 24 ◽  
pp. 15-24 ◽  
Author(s):  
M. Ariola ◽  
G. De Tommasi ◽  
A. Pironti ◽  
F. Villone
Keyword(s):  
Tokamak Plasmas ◽  
Resistive Wall ◽  
Resistive Wall Modes

Plasma stability theory including the resistive wall effects

2015 ◽  
Vol 81 (6) ◽  
Author(s):  
V. D. Pustovitov
Keyword(s):  
Stability Theory ◽  
Nonlinear Function ◽  
Thin Wall ◽  
Conducting Wall ◽  
Resistive Wall ◽  
Energy Sink ◽  
The Stability ◽  
Resistive Wall Modes ◽  
Complex Growth Rate ◽  
Plasma Stabilization

Plasma stabilization due to a nearby conducting wall can provide access to better performance in some scenarios in tokamaks. This was proved by experiments with an essential gain in${\it\beta}$and demonstrated as a long-lasting effect at sufficiently fast plasma rotation in the DIII-D tokamak (see, for example, Straitet al.,Nucl. Fusion, vol. 43, 2003, pp. 430–440). The rotational stabilization is the central topic of this review, though eventually the mode rotation gains significance. The analysis is based on the first-principle equations describing the energy balance with dissipation in the resistive wall. The method emphasizes derivation of the dispersion relations for the modes which are faster than the conventional resistive wall modes, but slower than the ideal magnetohydrodynamics modes. Both the standard thin wall and ideal-wall approximations are not valid in this range. Here, these are replaced by an approach incorporating the skin effect in the wall. This new element in the stability theory makes the energy sink a nonlinear function of the complex growth rate. An important consequence is that a mode rotating above a critical level can provide a damping effect sufficient for instability suppression. Estimates are given and applications are discussed.

Numerical Studies on Resistive Wall Instabilities in Cylindrical Plasma Confined by Surface Current

2011 ◽  
Vol 50-51 ◽  
pp. 785-789
Author(s):  
Shao Yan Cui ◽  
Peng Xie
Keyword(s):  
Plasma Flow ◽  
Initial Perturbation ◽  
Surface Current ◽  
Cylindrical Plasma ◽  
Resistive Wall Mode ◽  
Numerical Studies ◽  
Function Distribution ◽  
Resistive Wall ◽  
Dirac Function ◽  
The Stability

The stability of resistive wall mode is studied in cylindrical plasma confined by surface current, which is Dirac -function distribution. For Dirac -function distribution case, it is shown that the perturbations oscillate and even decline wherever the initial perturbation seed is placed. The whole system is stable and the plasma flow has little effect on it.

The influence of a thick resistive wall on the stability of a pinch

1980 ◽  
Vol 20 (4) ◽  
pp. 443-449 ◽  
Author(s):  
G.F. Nalesso ◽  
S. Costa
Keyword(s):  
Resistive Wall ◽  
The Stability

scholarly journals Evidence for the Importance of Trapped Particle Resonances for Resistive Wall Mode Stability in High Beta Tokamak Plasmas

2011 ◽  
Vol 106 (21) ◽  
Author(s):  
H. Reimerdes ◽  
J. W. Berkery ◽  
M. J. Lanctot ◽  
A. M. Garofalo ◽  
J. M. Hanson ◽  
...  
Keyword(s):  
Tokamak Plasmas ◽  
Resistive Wall Mode ◽  
Mode Stability ◽  
Resistive Wall ◽  
High Beta
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