Designing stellarators using perpendicular permanent magnets
| Autor: | Michael Zarnstorff, A. Brooks, David Gates, Caoxiang Zhu |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Physics
Nuclear and High Energy Physics Mechanical engineering FOS: Physical sciences Condensed Matter Physics 01 natural sciences Physics - Plasma Physics 010305 fluids & plasmas law.invention Magnetic field Plasma Physics (physics.plasm-ph) Planar Neodymium magnet law Electromagnetic coil Magnet 0103 physical sciences Perpendicular 010306 general physics Magnetic dipole Stellarator |
| ISSN: | 1741-4326 |
| Popis: | We have developed a fast method to design perpendicular permanent magnets for simplifying stellarator coils based on existing codes. Coil complexity is one of the main challenges for stellarators. To date, only electromagnetic coils have been used to generate 3D fields for stellarators. Permanent magnets provide an alternative way to produce the desired magnetic field for optimized stellarators. In this paper, we revisit the concept of representing surface current using magnetic dipoles and carry out numerical validations. A surface magnetization is proven to be equivalent to the surface current that can be linearly solved by existing coil design codes. An incremental multi-layer method has been developed to obtain a practical solution that is attainable with present permanent magnets. With this method, we can reproduce a half-Tesla NCSX configuration using specially designed neodymium magnets together with simple planar coils. It shows that stellarator coils could be substantially simplified by adopting permanent magnets. Accepted by Nuclear Fusion (https://doi.org/10.1088/1741-4326/ab9006) |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|