Effects of plasma turbulence on the nonlinear evolution of magnetic island in tokamak
arXiv:1909.12572 · doi:10.1038/s41467-020-20652-9
Abstract
Magnetic islands (MIs), resulting from a magnetic field reconnection, are ubiquitous structures in magnetized plasmas. In tokamak plasmas, recent researches suggested that the interaction between the MI and ambient turbulence can be important for the nonlinear MI evolution, but a lack of detailed experimental observations and analyses has prevented further understanding. Here, we provide comprehensive two-dimensional observations that indicate various effects of the ambient turbulence on the nonlinear MI evolution. It is shown that the modified plasma turbulence around the MI can lead to either destabilization or stabilization of the MI instability in tokamak plasmas. In particular, significantly enhanced turbulence at the X-point of the MI results in a violent disruption through the fast magnetic reconnection and magnetic field stochastization.
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Cited by in corpus (7)
- Impact of magnetic islands on plasma flow and turbulence in W7-X
- Global gyrokinetic simulations of the impact of magnetic island on ion temperature gradient driven turbulence
- Stochastic fluctuation and transport of tokamak edge plasmas with the resonant magnetic perturbation field
- Gyrokinetic simulations of the effects of magnetic islands on microturbulence in KSTAR
- Electroweak parameters from mixed SU(2) Yang-Mills Thermodynamics
- Leveraging turbulence data from fusion experiments
- Gyrokinetic simulations on zonal flow-turbulence spreading coupling