Volume 121, Number 4, February 2018
|Number of page(s)||6|
|Section||Physics of Gases, Plasmas and Electric Discharges|
|Published online||18 April 2018|
Effects of resonant magnetic perturbation on the triggering and the evolution of double-tearing mode
Institute of Fusion Science, School of Physical Science and Technology, Southwest Jiaotong University Chengdu, Sichuan 610031, PRC
Received: 5 October 2017
Accepted: 29 March 2018
The effects of resonant magnetic perturbation on the triggering and the evolution of the double-tearing mode are investigated by using nonlinear magnetohydrodynamics simulations in a slab geometry. It is found that the double-tearing mode can be destabilized by boundary magnetic perturbation. Moreover, the mode has three typical development stages before it reaches saturation: the linear stable stage, the linear-growth stage, and the exponential-growth stage. The onset and growth of the double-tearing mode significantly depend on the boundary magnetic perturbations, particularly in the early development stage of the mode. The influences of the magnetic perturbation amplitude on the mode for different separations of the two rational surfaces are also discussed.
PACS: 52.25.Xz – Magnetized plasmas / 52.30.Cv – Magnetohydrodynamics (including electron magnetohydrodynamics) / 52.35.Vd – Magnetic reconnection
© EPLA, 2018
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