Turbulence-reduced high-performance scenarios in Wendelstein 7-X

OP Ford, M Beurskens, SA Bozhenkov… - Nuclear …, 2024 - iopscience.iop.org
Abstract In the Wendelstein 7-X (W7-X) stellarator, turbulence is the dominant transport
mechanism in most discharges. This leads to a'clamping'of ion temperature over a wide …

Proof of concept of a fast surrogate model of the VMEC code via neural networks in Wendelstein 7-X scenarios

A Merlo, D Böckenhoff, J Schilling, U Höfel… - Nuclear …, 2021 - iopscience.iop.org
In magnetic confinement fusion research, the achievement of high plasma pressure is key to
reaching the goal of net energy production. The magnetohydrodynamic (MHD) model is …

Modeling and measurement of energetic particle slowing down in Wendelstein 7-X

SA Lazerson, D Pfefferlé, M Drevlak, H Smith… - Nuclear …, 2021 - iopscience.iop.org
The energetic particle slowing down model in the BEAMS3D stellarator neutral beam code
is compared to analytic models and experimental data from the Wendelstein 7-X experiment …

First neutral beam experiments on Wendelstein 7-X

SA Lazerson, O Ford, S Äkaslompolö… - Nuclear …, 2021 - iopscience.iop.org
In the previous divertor campaign, the Wendelstein 7-X (W7-X) device injected 3.6 MW of
neutral beam heating power allowing for the achievement of densities approaching 2× 10 20 …

Free-boundary MRxMHD equilibrium calculations using the stepped-pressure equilibrium code

SR Hudson, J Loizu, C Zhu, ZS Qu… - Plasma Physics and …, 2020 - iopscience.iop.org
The stepped-pressure equilibrium code (SPEC)(Hudson et al 2012 Phys. Plasmas 19, 112
502) is extended to enable free-boundary multi-region relaxed magnetohydrodynamic …

Gyro orbit simulations of neutral beam injection in Wendelstein 7-X

SA Lazerson, D Kulla, DA Hartmann, P McNeely… - Nuclear …, 2023 - iopscience.iop.org
Simulations exploring neutral beam operation in Wendelstein 7-X (W7-X) at reduced
magnetic field are performed using a newly implemented gyro orbit model in the BEAMS3D …

Plasma production in ICRF in the Uragan-2M stellarator in hydrogen–helium gas mixture

VE Moiseenko, YV Kovtun, AV Lozin… - Journal of Fusion …, 2022 - Springer
Plasma production experiments in helium at Uragan-2M have been performed to investigate
the role of the hydrogen minority in helium. The experiments presented here were carried on …

Energetic particle optimization of quasi-axisymmetric stellarator equilibria

A LeViness, JC Schmitt, SA Lazerson, A Bader… - Nuclear …, 2022 - iopscience.iop.org
An important goal of stellarator optimization is to achieve good confinement of energetic
particles such as, in the case of a reactor, alphas created by deuterium–tritium fusion. In this …

Validation of a synthetic fast ion loss detector model for Wendelstein 7-X

A LeViness, SA Lazerson, AJ van Vuuren… - Nuclear …, 2024 - iopscience.iop.org
We present the first validated synthetic diagnostic for fast ion loss detectors (FILDs) in the
Wendelstein 7-X (W7-X) stellarator. This model has been developed on, and validated …

Simulating fusion alpha heating in a stellarator reactor

SA Lazerson, A LeViness, J Lion - Plasma Physics and …, 2021 - iopscience.iop.org
Gyrocenter following simulations of fusion born alpha particles in a stellarator reactor are
preformed using the BEAMS3D code. The Wendelstein 7-X high mirror configuration is …