Toroidal studies of fast crash with Hall effects in tokamak
POSTER
Abstract
Both linear and nonlinear evolution of m/n=1/1 resistive kink mode is performed by a three-dimensional, fully toroidal, non-reduced and Hall-MHD code CLT. It is found that the hall terms can increase the linear growth rate of resistive kink mode when the thermal conductivity is small. However, they can greatly decrease the linear growth rate when the thermal conductivity exceeds the threshold. A transition from a ‘Y-type’ reconnection layer to a ‘X-type’ layer and a nonlinear enhanced growth rate are observed in Hall-MHD simulations, which are consistent with previous cylindrical simulations and theoretical analysis. This can be a good candidate to explain the fast crashes observed in tokamaks.
*This work is supported by National Magnetic Confinement Fusion Science Program of China under Grant No. 2013GB104004 and 2013GB111004, the Special Project on High-performance Computing under the National Key R&D Program of China No. 2016YFB0200603, Fundamental Research Fund for Chinese Central Universities, the National Natural Science Foundation of China under Grant No. 41474123.
Presenters
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Wei Zhang
- Institute for Fusion Theory and Simulation, Department of Physics, Zhejiang University, China