# On the dynamics of vortex modes within magnetic islands

@article{Hornsby2012OnTD, title={On the dynamics of vortex modes within magnetic islands}, author={W. A. Hornsby and A. G. Peeters and Mattia Siccinio and Emanuele Poli}, journal={Physics of Plasmas}, year={2012}, volume={19}, pages={032308} }

Recent work investigating the interaction of magnetic islands with micro-turbulence has uncovered the striking observation of large scale vortex modes forming within the island structure [W. A. Hornsby et al., Phys. Plasmas 17, 092301 (2010)]. These electrostatic vortices are found to be the size of the island and are oscillatory. It is this oscillatory behaviour and the presence of turbulence that leads us to believe that the dynamics are related to the geodesic acoustic mode (GAM), and it is…

## 25 Citations

Magnetic island evolution in the presence of ion-temperature gradient-driven turbulence

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Turbulence is known to drive and sustain magnetic islands of width equal to multiples of the Larmor radius. The nature of the drive is studied here by means of numerical simulations of a fluid…

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Neoclassical tearing modes have deleterious effects on plasma confinement and, if they grow large enough, they can lead to discharge termination. Therefore, they impose a major barrier in the…

Gyrokinetic simulation study of magnetic island effects on neoclassical physics and micro-instabilities in a realistic KSTAR plasma

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- 2018

We perform gyrokinetic simulations to study the effects of a stationary magnetic island on neoclassical flow and micro-instability in a realistic KSTAR plasma condition. Through the simulations, we…

The non-linear evolution of the tearing mode in electromagnetic turbulence using gyrokinetic simulations

- Physics
- 2015

The non-linear evolution of a magnetic island is studied using the Vlasov gyro-kinetic code GKW. The interaction of electromagnetic turbulence with a self-consistently growing magnetic island,…

Nonlinear dynamics of multiple neoclassical tearing modes in tokamaks

- Physics
- 2013

Numerical simulations investigating the interaction of co-existent 2/1 and 3/1 neoclassical tearing modes are presented. The results obtained from an initial value 3D toroidal code that solves a set…

The effect of magnetic islands on Ion Temperature Gradient turbulence driven transport

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- 2014

In this work, we address the question of the influence of magnetic islands on the perpendicular transport due to steady-state ITG turbulence on the energy transport time scale. We demonstrate that…

Response of microscale turbulence and transport to the evolution of resistive magnetohydrodynamic magnetic island

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- 2014

Nonlinear evolution of microscale turbulence interacting with a naturally growing MHD magnetic island is simulated based on a Landau-fluid model. Here, we report on a new short wavelength…

Self-consistent interaction of the tearing mode with electromagnetic gyro-kinetic turbulence

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- 2014

Magnetic islands in a tokamak can lead to loss of confinement through a change of magnetic topology via magnetic reconnection. Their growth can lead to major disruptions of confined plasmas. As a…

Drive of a long-lived vortex-flow pattern by coupling to zonal flows in presence of resonant magnetic perturbations

- Physics, Engineering
- 2015

The working hypothesis for the origin of edge-localized-mode stabilization is that Resonant Magnetic Perturbations (RMPs) increase transport in the pedestal, thus lowering the pressure gradient below…

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