# Experimental conditions to suppress edge localised modes by magnetic perturbations in the ASDEX Upgrade tokamak

@article{Suttrop2018ExperimentalCT, title={Experimental conditions to suppress edge localised modes by magnetic perturbations in the ASDEX Upgrade tokamak}, author={Wolfgang Suttrop and Andrew Kirk and V. Bobkov and M. Cavedon and Mike Dunne and R. M. McDermott and H. Meyer and Raffi Nazikian and Carlos Paz-Soldan and D A Ryan and Eleonora Viezzer and Matthias Willensdorfer}, journal={Nuclear Fusion}, year={2018}, volume={58} }

Access conditions for full suppression of edge localised modes (ELMs) by magnetic perturbations (MP) in low density high confinement mode (H-mode) plasmas are studied in the ASDEX Upgrade tokamak. The main empirical requirements for full ELM suppression in our experiments are: 1. The poloidal spectrum of the MP must be aligned for best plasma response from weakly stable kink-modes, which amplify the perturbation, 2. The plasma edge density must be below a critical value, m−3. The edge…

## 54 Citations

### Wide Operational Windows of Edge-Localized Mode Suppression by Resonant Magnetic Perturbations in the DIII-D Tokamak.

- PhysicsPhysical review letters
- 2020

The model predicts that wide q_{95} windows of ELM suppression can be achieved at substantially higher pedestal pressure in DIII-D by shifting to higher toroidal mode number (n=4) RMPs.

### Dynamics of ideal modes and subsequent ELM crashes in 3D tokamak geometry from external magnetic perturbations

- PhysicsPlasma Physics and Controlled Fusion
- 2018

The impact of three-dimensional (3D) tokamak geometry from external magnetic perturbations on edge instabilities has been examined in high confinement mode plasmas with edge localised modes (ELMs) in…

### Predicting operational windows of ELMs suppression by resonant magnetic perturbations in the DIII-D and KSTAR tokamaks

- Physics
- 2021

A newly developed plasma response model, combining the nonlinear two-fluid MHD code TM1 and toroidal MHD code GPEC run in ideal mode, quantitatively predicts the narrow isolated q95 windows (Δq95 ∼…

### Turbulence characterization during the suppression of edge-localized modes by magnetic perturbations on ASDEX Upgrade

- PhysicsNuclear Fusion
- 2023

We study localized edge turbulence in the ASDEX Upgrade tokamak that appears if resonant magnetic perturbations (RMP) are applied to suppress edge localized modes (ELMs) in the high confinement mode.…

### Dependence of the L–H power threshold on the alignment of external non-axisymmetric magnetic perturbations in ASDEX Upgrade

- PhysicsPhysics of Plasmas
- 2022

Experiments at ASDEX Upgrade have been conducted to study the impact of the alignment of external magnetic perturbations (MPs) with n = 2 toroidal mode symmetry on the power threshold of the…

### Non-linear free boundary simulations of the plasma response to resonant magnetic perturbations in ASDEX Upgrade plasmas

- PhysicsJournal of Physics: Conference Series
- 2022

A promising method for the control of Edge Localized Modes (ELMs) in H-Mode tokamak plasmas is the application of Resonant Magnetic Perturbations (RMPs), where small helical field perturbations are…

### The role of edge resonant magnetic perturbations in edge-localized-mode suppression and density pump-out in low-collisionality DIII-D plasmas

- PhysicsNuclear Fusion
- 2020

Two-fluid nonlinear MHD simulations using the TM1 code demonstrate that the formation of magnetic islands at the top and bottom of the H-mode pedestal, together with the strong screening of resonant…

### Effect of magnetic perturbations for ELM control on divertor power loads, detachment and consequences of field penetration in ASDEX Upgrade

- PhysicsPlasma Physics and Controlled Fusion
- 2018

Magnetic perturbation (MP) fields are currently studied in ASDEX Upgrade and many other tokamaks in terms of edge localized mode control and the implication onto steady state divertor power load and…

### Plasma response to resonant magnetic perturbations near rotation zero-crossing in low torque plasmas

- PhysicsPhysics of Plasmas
- 2021

Plasma response to resonant magnetic perturbations (RMPs) near the pedestal top is crucial for accessing edge localized modes (ELMs) suppression in tokamaks. Since radial location of relevant…

### Non-linear modeling of the threshold between ELM mitigation and ELM suppression by resonant magnetic perturbations in ASDEX upgrade

- PhysicsPhysics of Plasmas
- 2019

The interaction between Edge-Localized Modes (ELMs) and Resonant Magnetic Perturbations (RMPs) is modeled with the magnetohydrodynamic code JOREK using experimental parameters from ASDEX Upgrade…

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