It is shown analytically and with a numerical code that the nonlinear growth and saturation of magnetic islands in tokamaks are not affected by diamagnetic corrections. Diamagnetic effects change the linear growth and introduce mode rotation, which persists in the nonlinear regime. The analysis is used to construct a model for the effect of feedback stabilization schemes in the nonlinear regime.
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© 1980 American Institute of Physics.
1980
American Institute of Physics
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