Design?of quasi-axisymmetric stellarators with variable-thickness perpendicular permanent magnets based on a two-step magnet design?strategy

doi:10.1088/1741-4326/ac1710

	Design?of quasi-axisymmetric stellarators with variable-thickness perpendicular permanent magnets based on a two-step magnet design?strategy
	Lu,Z.Y.1,2; Xu,G.S.1; Chen,D.H.1; Chen,L.1; Zhang,X.Y.1,2; Ye,M.Y.2; Wan,B.N.1
刊名	Nuclear Fusion
	2021-09-16
卷号	61
关键词	stellarator permanent magnet two-step magnet design ?strategy local compensation method global fine-tuning method
ISSN号	0029-5515
DOI	10.1088/1741-4326/ac1710
英文摘要	AbstractA new method for designing stellarators with variable-thickness perpendicular permanent magnets has been developed, based on a two-step magnet design?strategy that we previously proposed for designing stellarators with standardized magnet blocks. Our design?strategy uses a ‘local compensation’ method to obtain an initial magnet design?and a ‘global fine-tuning’ method to further optimize the initial design. The new method is compared to the previously proposed Fourier decomposition method, and the results indicate that this new method can yield a similar magnet design?for an Nfp = 2 quasi-axisymmetric stellarator at a lower computational cost. High accuracy is achieved, as demonstrated by a normal magnetic field square on the plasma surface of χB2=3.43×10?8T2m2, a maximum residual of Bn=3.44Gs for a ～1?T total field, and a flux-surface-averaged residual Bn of Bn/B=3.16×10?5 relative to the total field. Furthermore, the new method can automatically yield a magnet design?with large areas of continuous vacancies for ports and plasma access, which is more flexible than the Fourier decomposition method. These results indicate that the new method is robust and effective when used to design?stellarators with variable-thickness perpendicular permanent magnets, and, most importantly, that the two-step magnet design?strategy has great potential to develop permanent magnet design?methods suitable for various magnet layouts.
语种	英语
出版者	IOP Publishing
WOS记录号	IOP:0029-5515-61-10-AC1710
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/125369]
专题	中国科学院合肥物质科学研究院
作者单位	1.Institute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China 2.University of Science and Technology of China, Hefei 230026, China
推荐引用方式 GB/T 7714	Lu,Z.Y.,Xu,G.S.,Chen,D.H.,et al. Design?of quasi-axisymmetric stellarators with variable-thickness perpendicular permanent magnets based on a two-step magnet design?strategy[J]. Nuclear Fusion,2021,61.
APA	Lu,Z.Y..,Xu,G.S..,Chen,D.H..,Chen,L..,Zhang,X.Y..,...&Wan,B.N..(2021).Design?of quasi-axisymmetric stellarators with variable-thickness perpendicular permanent magnets based on a two-step magnet design?strategy.Nuclear Fusion,61.
MLA	Lu,Z.Y.,et al."Design?of quasi-axisymmetric stellarators with variable-thickness perpendicular permanent magnets based on a two-step magnet design?strategy".Nuclear Fusion 61(2021).