Mapping the space of quasisymmetric stellarators using optimized near-axis expansion

M Landreman - Journal of Plasma Physics, 2022 - cambridge.org
A method is demonstrated to rapidly calculate the shapes and properties of quasi-
axisymmetric and quasi-helically symmetric stellarators. In this approach, optimization is …

Single-stage stellarator optimization: combining coils with fixed boundary equilibria

R Jorge, A Goodman, M Landreman… - Plasma Physics and …, 2023 - iopscience.iop.org
We introduce a novel approach for the simultaneous optimization of plasma physics and coil
engineering objectives using fixed-boundary equilibria that is computationally efficient and …

[HTML][HTML] EUTERPE: A global gyrokinetic code for stellarator geometry

R Kleiber, M Borchardt, R Hatzky, A Könies… - Computer Physics …, 2024 - Elsevier
The current state of the EUTERPE code is described with emphasis on the implemented
models and their numerical implementation. The code solves the multi-species …

First-principles based plasma profile predictions for optimized stellarators

AB Navarro, A Di Siena, JL Velasco, F Wilms… - Nuclear …, 2023 - iopscience.iop.org
In the present Letter, first-of-its-kind computer simulations predicting plasma profiles for
modern optimized stellarators—while self-consistently retaining neoclassical transport …

GX: a GPU-native gyrokinetic turbulence code for tokamak and stellarator design

NR Mandell, W Dorland, I Abel, R Gaur, P Kim… - arXiv preprint arXiv …, 2022 - arxiv.org
GX is a code for solving the nonlinear gyrokinetic system for low-frequency turbulence in
magnetized plasmas, particularly tokamaks and stellarators. In GX, our primary motivation …

Global gyrokinetic simulations of ITG turbulence in the magnetic configuration space of the Wendelstein 7-X stellarator

AB Navarro, G Merlo, GG Plunk… - Plasma Physics and …, 2020 - iopscience.iop.org
We study the effect of turbulent transport in different magnetic configurations of the
Weldenstein 7-X stellarator. In particular, we performed direct numerical simulations with the …

Turbulence suppression by energetic particle effects in modern optimized stellarators

A Di Siena, A Bañón Navarro, F Jenko - Physical Review Letters, 2020 - APS
Turbulent transport is known to limit the plasma confinement of present-day optimized
stellarators. To address this issue, a novel method to strongly suppress turbulence in such …

Global electromagnetic turbulence simulations of W7-X-like plasmas with GENE-3D

F Wilms, AB Navarro, G Merlo, L Leppin… - Journal of Plasma …, 2021 - cambridge.org
The GENE-3D code, the global stellarator version of the established GENE framework, has
been extended to an electromagnetic gyrokinetic code. This paper outlines the basic …

Physics design point of high-field stellarator reactors

JA Alonso, I Calvo, D Carralero, JL Velasco… - Nuclear …, 2022 - iopscience.iop.org
The ongoing development of electromagnets based on high temperature superconductors
has led to the conceptual exploration of high-magnetic-field fusion reactors of the tokamak …

Phase contrast imaging measurements and numerical simulations of turbulent density fluctuations in gas-fuelled ECRH discharges in Wendelstein 7-X

JP Bähner, JA Alcusón, SK Hansen… - Journal of Plasma …, 2021 - cambridge.org
The fundamental nature of turbulent density fluctuations in standard Wendelstein 7-X (W7-X)
stellarator discharges is investigated experimentally via phase contrast imaging (PCI) in …