Stellarator Simplification using Permanent Magnets (PM4Stell)
[1];
[1];
[2];
[3];
[1];
[1];
[1];
[1];
[1];
[1];
[5];
[3];
[1];
[1]
- Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)
- SABR Enterprises, LLC, North Andover, MA (United States)
- Auburn Univ., AL (United States)
- Ansys, Canonsburg, PA (United States)
- Princeton Univ., NJ (United States)
This Report describes the design and prototyping of an array of rare-Earth permanent magnets to form a stellarator. This effort was motivated by the hypothesis that the usage of permanent magnets, rather than electromagnetic coils with complex geometry, could reduce the cost of stellarator construction and thereby make increase the feasibility of the stellarator as a technology for a fusion-based power plant. In this project, we have developed novel methods for specifying the positions, shapes, and polarizations of the magnets in the array, and have developed designs for mounting structures and tooling for assembly. We have also performed detailed finite-element modeling to qualify the accuracy of the magnetic field produced by the magnet array as designed, and to confirm that the structure can withstand the forces between the magnets. We have also developed techniques for measuring the magnetic field produced by the array once constructed, as well as for correcting errors in the field arising from misalignments and offsets within the tolerances for mounting and fabrication. Finally, we have constructed a tabletop prototype of a section of the array to qualify the concept for assembling and mounting magnets within the array.
- Research Organization:
- Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States); SABR Enterprises, LLC, North Andover, MA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Fusion Energy Sciences (FES)
- DOE Contract Number:
- AC02-09CH11466; AR0001264
- OSTI ID:
- 1963786
- Report Number(s):
- DOE-PPPL-2023_215; TRN: US2403277
- Country of Publication:
- United States
- Language:
- English
Similar Records
A novel scheme for error field correction in permanent magnet stellarators
Improved stellarator permanent magnet designs through combined discrete and continuous optimizations