Enhanced performance in quasi-isodynamic max-$J$ stellarators with a turbulent particle pinch
Plasma Physics
2026-04-22 v3
Abstract
Recent stellarator reactor designs demonstrate mostly outward turbulent particle transport, which, without advanced fueling technology, inhibits the formation of density gradients needed for confinement. We introduce ``SQuID-'', a self-fueling quasi-isodynamic stellarator capable of sustaining density peaking through inward particle transport caused by turbulence. Temperature and density profile predictions based on high-fidelity gyrokinetic simulations demonstrate enhanced performance, significantly relaxing constraints on the size and magnetic field strength for reactor designs.
Cite
@article{arxiv.2507.19319,
title = {Enhanced performance in quasi-isodynamic max-$J$ stellarators with a turbulent particle pinch},
author = {G. G. Plunk and A. G. Goodman and P. Xanthopoulos and P. Costello and H. M. Smith and K. Aleynikova and C. D. Beidler and M. Drevlak and S. Stroteich and P. Helander},
journal= {arXiv preprint arXiv:2507.19319},
year = {2026}
}