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 JP11: Poster Session IV: In-Person, Hall A (2:00-3:30pm) and Virtual Poster Presentations (3:45-5:00pm)
BEAMS: Laser Accelerators
Education, Public Engagement, and DEI
High School and Undergraduate Research
2:00 PM - 5:00 PM
Tuesday, October 18, 2022
Room: Exhibit Hall A and Online
Abstract: JP11.00129 : Effect of changing coil complexity and magnetic boundary accuracy weights on stellarator coil optimization*
Presenter:
Alexander V Wiedman
(University of Maryland, College Park)
Authors:
Alexander V Wiedman
(University of Maryland, College Park)
Matt Landreman
(University of Maryland)
Stefan Buller
(University of Maryland, College Park)
In the past year, several Stellarator designs have been created with great calculated fast particle confinement when compared with designs of the past. Several magnetic equilibrium have been found which have fast-particle losses below 1.8% which is 18 times lower than a Wendelstein equilibrium. To demonstrate the feasibility of these designs, magnetic coils must be found that both accurately recreate the magnetic boundary and are practical to build. In this work, we optimize and analyze different coil configurations for a Stellarator which uses the quasihelical magnetic geometry in (Landreman & Paul, Phys. Rev. Lett. 128 (2022) 035001). These coils are optimized using the SIMSOPT framework. We observe how the minimization with different weighting of accuracy of magnetic equilibrium reconstruction and various coil complexity metrics affects the number of fast particles lost. We also optimize using weights on the accuracy of the magnetic boundary which differ across the surface. The work outlined could assist in the design of future constructable coil configurations.
*This work was supported by the U.S. Department of Energy award DE-FG02-93ER54197
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