U.S. Department of EnergyOffice of Scientific and Technical Information
Design of an arrangement of cubic magnets for a quasi-axisymmetric stellarator experiment
Abstract
The usage of permanent magnets to shape the confining field of a stellarator has the potential to reduce or eliminate the need for non-planar coils. As a proof-of-concept for this idea, we have developed a procedure for designing an array of cubic permanent magnets that works in tandem with a set of toroidal-field coils to confine a stellarator plasma. All of the magnets in the design are constrained to have identical geometry and one of three polarization types in order to simplify fabrication while still producing sufficient field accuracy. We present some of the key steps leading to the design, including the geometric arrangement of the magnets around the device, the procedure for optimizing the polarizations according to three allowable magnet types, and the choice of magnet types to be used. We apply these methods to design an array of rare-Earth permanent magnets that can be paired with a set of planar toroidal-field coils to confine a quasi-axisymmetric plasma with a toroidal magnetic field strength of about 0.5 T on axis.
- Authors:
-
- Princeton Plasma Physics Laboratory
- Publication Date:
- DOE Contract Number:
- AC02-09CH11466
- Research Org.:
- Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1888258
- DOI:
- https://doi.org/10.11578/1888258
Citation Formats
Hammond, Kenneth, Zhu, Caoxiang, Korrigan, Keith, Gates, David, Lown, Robert, Mercurio, Robert, Qian, Tony, and Zarnstorff, Michael. Design of an arrangement of cubic magnets for a quasi-axisymmetric stellarator experiment. United States: N. p., 2022.
Web. doi:10.11578/1888258.
Hammond, Kenneth, Zhu, Caoxiang, Korrigan, Keith, Gates, David, Lown, Robert, Mercurio, Robert, Qian, Tony, & Zarnstorff, Michael. Design of an arrangement of cubic magnets for a quasi-axisymmetric stellarator experiment. United States. doi:https://doi.org/10.11578/1888258
Hammond, Kenneth, Zhu, Caoxiang, Korrigan, Keith, Gates, David, Lown, Robert, Mercurio, Robert, Qian, Tony, and Zarnstorff, Michael. 2022.
"Design of an arrangement of cubic magnets for a quasi-axisymmetric stellarator experiment". United States. doi:https://doi.org/10.11578/1888258. https://www.osti.gov/servlets/purl/1888258. Pub date:Tue Sep 06 00:00:00 EDT 2022
@article{osti_1888258,
title = {Design of an arrangement of cubic magnets for a quasi-axisymmetric stellarator experiment},
author = {Hammond, Kenneth and Zhu, Caoxiang and Korrigan, Keith and Gates, David and Lown, Robert and Mercurio, Robert and Qian, Tony and Zarnstorff, Michael},
abstractNote = {The usage of permanent magnets to shape the confining field of a stellarator has the potential to reduce or eliminate the need for non-planar coils. As a proof-of-concept for this idea, we have developed a procedure for designing an array of cubic permanent magnets that works in tandem with a set of toroidal-field coils to confine a stellarator plasma. All of the magnets in the design are constrained to have identical geometry and one of three polarization types in order to simplify fabrication while still producing sufficient field accuracy. We present some of the key steps leading to the design, including the geometric arrangement of the magnets around the device, the procedure for optimizing the polarizations according to three allowable magnet types, and the choice of magnet types to be used. We apply these methods to design an array of rare-Earth permanent magnets that can be paired with a set of planar toroidal-field coils to confine a quasi-axisymmetric plasma with a toroidal magnetic field strength of about 0.5 T on axis.},
doi = {10.11578/1888258},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Sep 06 00:00:00 EDT 2022},
month = {Tue Sep 06 00:00:00 EDT 2022}
}