The effect of blanket system and port plugs on the harmonic components of error field and optimizing approach investigation

doi:10.1088/1741-4326/acfe1d

	The effect of blanket system and port plugs on the harmonic components of error field and optimizing approach investigation
	Liu, Zhao 1,2; Lei, Mingzhun 2; Wu, Qigang 1,2; Liu, Sumei 2
刊名	NUCLEAR FUSION
	2023-12-01
卷号	63
关键词	CFETR blanket system error field Fourier decomposition
ISSN号	0029-5515
DOI	10.1088/1741-4326/acfe1d
通讯作者	Lei, Mingzhun(leimz@ipp.ac.cn)
英文摘要	The fusion plasma is sensitive to the penetration of the toroidal mode numbers n harmonic components of the error fields (EFs), and the toroidal mode components of the EFs are closely tied to the toroidal distribution of the magnetic field source. The primary source of EFs within the magnetic field sources is the current source, such as the magnet system, while the magnetic field produced by magnetized ferromagnetic materials may also generate EFs. The ferromagnetic field source, such the reduced-activation ferritic-martensitic steel, represent a smaller portion of the EFs source. However, the use of ferromagnetic materials is expected to increase significantly as tokamak research transitions from experimental devices to demonstration and commercial reactors, particularly for the structural materials of in-vessel components and port plugs. Predictably, the EFs induced by ferromagnetic materials will increase and may even surpass the design specifications. In this study, the EFs introduced by the water-cooling ceramic breeder blanket system and the vacuum vessel port plugs of China Fusion Engineering Test Reactor are comprehensively analyzed by an analytical approach and finite element numerical approach, which is based on the Fourier decomposition. The results reveal a clear linear relationship between the EFs formed by the saturated magnetization module and its rigid displacement deviating from periodic symmetry, as well as the same behavior in EFs and overall magnetization intensity. Compared to the assembly error of the blanket system, the EFs that may be introduced by the equatorial ports and plugs are substantial, including larger n <= 3 toroidal mode harmonic components that can lead to lock mode and disruption. Moreover, using the correlation between harmonic components and symmetrical periods, specific toroidal mode components can be selectively shielded.
资助项目	The author would like to express his gratitude to all the members of the CFETR design team. This work is financially supported by the National Natural Science Foundation of China (No. 12075278).[12075278] ; National Natural Science Foundation of China
WOS关键词	LOCKED MODES ; DIII-D
WOS研究方向	Physics
语种	英语
出版者	IOP Publishing Ltd
WOS记录号	WOS:001083586600001
资助机构	The author would like to express his gratitude to all the members of the CFETR design team. This work is financially supported by the National Natural Science Foundation of China (No. 12075278). ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/133366]
专题	中国科学院合肥物质科学研究院
通讯作者	Lei, Mingzhun
作者单位	1.Univ Sci & Technol China, Hefei 230026, Peoples R China 2.Chinese Acad Sci, Hefei Inst Phys Sci, Inst Plasma Phys, Hefei 230031, Peoples R China
推荐引用方式 GB/T 7714	Liu, Zhao,Lei, Mingzhun,Wu, Qigang,et al. The effect of blanket system and port plugs on the harmonic components of error field and optimizing approach investigation[J]. NUCLEAR FUSION,2023,63.
APA	Liu, Zhao,Lei, Mingzhun,Wu, Qigang,&Liu, Sumei.(2023).The effect of blanket system and port plugs on the harmonic components of error field and optimizing approach investigation.NUCLEAR FUSION,63.
MLA	Liu, Zhao,et al."The effect of blanket system and port plugs on the harmonic components of error field and optimizing approach investigation".NUCLEAR FUSION 63(2023).