Nonlinear growth of strongly unstable tearing modes

Fast Growth and Sheared Flow Generation in Nonlinear Development of Double Tearing Modes

The nonlinear development of double tearing modes (DTMs) mediated by parallel electron viscosity in a large aspect ratio torus is simulated. The emphasis is placed on the mechanisms for the fast growth and sheared flow generation in the development of the DTMs. Four nonlinear developing stages: the early growth, transition, fast growth and decay, are found. In comparison with the helical magnet...

Temperature-Gradient-Driven Tearing Modes

The observation of spontaneous islands growth in tokamak experiments indicates that the tearing mode could also be linearly unstable. However, in the framework of resistive magnetohydrodynamics, previous works have demonstrated that drift effects, electron heat transport along magnetic field lines and ion Larmor radius effects have stabilizing effects. Recently, numerical calculations and analy...

Differential rotation of the unstable nonlinear r-modes

John L. Friedman, Lee Lindblom, and Keith H. Lockitch Department of Physics, Leonard Parker Center for Gravitation, Cosmology and Astrophysics, University of Wisconsin—Milwaukee, P.O. Box 413, Milwaukee, Wisconsin 53201, USA Theoretical Astrophysics 350-17, California Institute of Technology, Pasadena, California 91125, USA Center for Astrophysics and Space Sciences 0424, University of Californ...

On stabilization of switched nonlinear systems with unstable modes

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Quasi-linear evolution of tearing modes