Nine stellarator configurations, three quasiaxisymmetric, three quasihelically symmetric and
three non-quasisymmetric are scaled to ARIES-CS size and analyzed for energetic particle …

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 …

A good understanding of the confinement of energetic ions in non-axisymmetric magnetic
fields is key for the design of reactors based on the stellarator concept. In this work, we …

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 …

We present recent highlights from the most recent operation phases of Wendelstein 7-X, the
most advanced stellarator in the world. Stable detachment with good particle exhaust, low …

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 …

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 …

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 …

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 …

This work introduces meta estimators that combine multiple multifidelity techniques based
on control variates, importance sampling, and information reuse to yield a quasi …