Bulletin of the American Physical Society
64th Annual Meeting of the APS Division of Plasma Physics
Volume 67, Number 15
Monday–Friday, October 17–21, 2022; Spokane, Washington
Session NP11: Poster Session V: In-Person, Hall A (9:30-11:00am) and Virtual Poster Presentations (11:15am-12:30pm)
MFE: Stellerators
HED: High Energy Density
BEAMS: Short Pulse Laser Plasmas
HED: Short Pulse Laser Plasma
SPACE: Space Plasmas
9:30 AM - 12:30 PM
Wednesday, October 19, 2022
Room: Exhibit Hall A and Online
Abstract: NP11.00020 : Exploring stellarator beta-limits with nonlinear MHD modeling*
Presenter:
Adelle Wright
(Princeton Plasma Physics Laboratory)
Authors:
Adelle Wright
(Princeton Plasma Physics Laboratory)
Nathaniel M Ferraro
(Princeton Plasma Physics Laboratory)
We capture the self-consistent evolution of both the magnetic field and pressure gradients using sources and anisotropic thermal transport. Importantly, we impose no assumptions or constraints on the magnetic field topology (such as the existence of magnetic surfaces) or the plasma shape.
Understanding nonlinear MHD stability is important for fusion. Clarifying the role of 3D effects is critical for determining when macroscopic instabilities are benign or have the potential to become disruptive. Like tokamaks, stellarators can be susceptible to (sometimes disruptive) pressure and current-driven instabilities; ‘soft’ linear stability limits, corresponding to benign core-MHD activity, and disruptions, have both been observed experimentally.
The extended-MHD, initial value-code, M3D-C1, was recently extended to accommodate stellarator geometry, providing a unique capability to explore nonlinear MHD and the effect of 3D transport in stellarators.
*This work was supported by Department of Energy Contract No. DE-AC02-09-CH11466.
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