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
	2021-10-01
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
通讯作者	Xu, G. S.(gsxu@ipp.ac.cn) ; Chen, D. H.(dehong.chen@ipp.ac.cn)
英文摘要	A 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 N-fp = 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 chi(2)(B) = 3.43 x 10(-8) T(2)m(2), a maximum residual of vertical bar B-n vertical bar = 3.44 Gs for a similar to 1 T total field, and a flux-surface-averaged residual B-n of = 3.16 x 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.
资助项目	National Magnetic Confinement Fusion Energy R&D Program of China[2019YFE03030000] ; National Natural Science Foundation of China[U19A20113] ; Key Research Program of Frontier Sciences, CAS[QYZDB-SSW-SLH001] ; CASHIPS Director's Fund[BJPY2019A01] ; K.C. Wong Education Foundation
WOS研究方向	Physics
语种	英语
出版者	IOP PUBLISHING LTD
WOS记录号	WOS:000696375000001
资助机构	National Magnetic Confinement Fusion Energy R&D Program of China ; National Natural Science Foundation of China ; Key Research Program of Frontier Sciences, CAS ; CASHIPS Director's Fund ; K.C. Wong Education Foundation
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/125321]
专题	中国科学院合肥物质科学研究院
通讯作者	Xu, G. S.; Chen, D. H.
作者单位	1.Chinese Acad Sci, Inst Plasma Phys, Hefei Inst Phys Sci, Hefei 230031, Peoples R China 2.Univ Sci & Technol China, Hefei 230026, Peoples R 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).