# Semianalytical calculation of the zonal-flow oscillation frequency in stellarators

@article{Monreal2017SemianalyticalCO, title={Semianalytical calculation of the zonal-flow oscillation frequency in stellarators}, author={P. Monreal and E. S{\'a}nchez and Iv{\'a}n Calvo and A. Bustos and Felix I. Parra and Alexey Mishchenko and Axel Konies and Ralf Kleiber}, journal={Plasma Physics and Controlled Fusion}, year={2017}, volume={59} }

Due to their capability to reduce turbulent transport in magnetized plasmas, understanding the dynamics of zonal flows is an important problem in the fusion program. Since the pioneering work by Rosenbluth and Hinton in axisymmetric tokamaks, it is known that studying the linear and collisionless relaxation of zonal flow perturbations gives valuable information and physical insight. Recently, the problem has been investigated in stellarators and it has been found that in these devices the…

## 9 Citations

### Oscillatory relaxation of zonal flows in a multi-species stellarator plasma

- PhysicsPlasma Physics and Controlled Fusion
- 2018

The low frequency oscillatory relaxation of zonal potential perturbations is studied numerically in the TJ-II stellarator (where it was experimentally detected recently for the first time in Alonso…

### Nonlinear gyrokinetic PIC simulations in stellarators with the code EUTERPE

- PhysicsJournal of Plasma Physics
- 2020

In this work, the first nonlinear particle-in-cell simulations carried out in a stellarator with the global gyrokinetic code EUTERPE using adiabatic electrons and realistic plasma parameters are…

### Validation of global gyrokinetic simulations in stellarator configurations

- PhysicsNuclear Fusion
- 2019

In this paper, recent simulations carried out with the global gyrokinetic code EUTERPE in configurations of the TJ-II stellarator are presented. The simulations are compared with experimental…

### Comparison of local and global gyrokinetic calculations of collisionless zonal flow damping in quasi-symmetric stellarators

- PhysicsPhysics of Plasmas
- 2021

The linear collisionless damping of zonal flows is calculated for quasi-symmetric stellarator equilibria in flux-tube, flux-surface, and full-volume geometry. Equilibria are studied from the…

### Impact of resonant magnetic perturbations on zonal flows and microturbulence

- PhysicsNuclear Fusion
- 2020

Results from a joint experimental and computational effort studying the effect of resonant magnetic perturbations (RMPs) on microturbulence levels and their connection to zonal flows in the DIII-D…

### Overview of recent TJ-II stellarator results

- PhysicsNuclear Fusion
- 2019

The main results obtained in the TJ-II stellarator in the last two years are reported. The most important topics investigated have been modelling and validation of impurity transport, validation of…

### A comparison of turbulent transport in a quasi-helical and a quasi-axisymmetric stellarator

- PhysicsJournal of Plasma Physics
- 2019

Ion-temperature-gradient-driven (ITG) turbulence is compared for two quasi-symmetric (QS) stellarator configurations to determine the relationship between linear growth rates and nonlinear heat…

### Electrostatic gyrokinetic simulations in Wendelstein 7-X geometry: benchmark between the codes stella and GENE

- Computer ScienceJournal of Plasma Physics
- 2022

This paper attempts to provide a sufficiently complete, documented and verified set of gyrokinetic simulations in W7-X geometry against which new codes or upgrades of existing codes can be tested and benchmarked between the recently developed code stella and the well-established code GENE.

### Long-time collisionless relaxation of zonal flows in toroidal fusion devices

- Physics
- 2017

La reduccion del transporte turbulento por flujos zonales en tokamaks y stellarators ha sido estudiada durante decadas. Estos flujos estan asociados a perturbaciones de potencial electrostatico…

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