Optimization of distribution of permanent magnetrings for Faraday rotation spectroscopy

doi:10.7498/aps.71.20212031

	Optimization of distribution of permanent magnetrings for Faraday rotation spectroscopy
	Jia Feng-Ming 1,2; Mei Jiao-Xu 2; Wang Rui-Feng 1,2; Cheng Gang 3; Liu Kun 2; Gao Xiao-Ming 2
刊名	ACTA PHYSICA SINICA
	2022-04-20
卷号	71
关键词	permanent magnetic rings distribution of magnet simulation and optimization Faraday rotation spectroscopy
ISSN号	1000-3290
DOI	10.7498/aps.71.20212031
通讯作者	Mei Jiao-Xu(jxmei@aiofm.ac.cn)
英文摘要	Faraday rotation spectroscopy (FRS) is generally used to detect the concentrations of various paramagnetictrace gases because of its high detection sensitivity, zero background noise and the ability to get rid of theinterference of diamagnetic materials effectively. In most of FRS technologies, the used electromagnetic fieldsare produced by coils, thereby triggering off some problems such as high energy consumption and excessive heatgeneration. Thus the modeling and the simulation study of spatial magnetic field distribution based on thecombined ring permanent magnets are carried out to establish an axially distributed homogeneous magneticfield and provide a permanent magnet-based homogeneous magnetic field along the optical axis for FRSmeasurement. In this simulation, the method of finite element mesh division is adopted based on basicelectromagnetic relationship in Maxwell equations. By the simulation study of the magnetic field distribution ofthe actual Nd-Fe-B permanent magnet magnetic ring array, the physical model proves to be reliable. Basically,three methods of optimizing the permanent magnetic ring arrays. i.e. single ideal value optimization method,the multi-part single objective optimization method, and the gradient optimization method, are proposed. Thesingle ideal value optimization method and the multiple ideal value optimization method are used to realize theoptimization of magnets. However, by analyzing the two methods, it is clear that compared with the single idealvalue optimization method, the multiple ideal value optimization method in which the whole region is dividedinto several small parts can achieve good uniformity of permanent magnet array. In this way, the third method,i.e. the gradient optimization method is used to realize the construction of a homogeneous magnetic field with auniform central axis magnetic flux density distribution used for FRS. Finally, the standard magnetic fielduniformity for measuring the quality of magnet field is suggested, and through the calculation and evaluation ofthe magnetic field uniformity, the optimization effects of different optimization methods are analyzed andcompared with each other. And the final results about realizing a homogeneous magnetic field provide areference for developing the FRS equipment based on permanent magnets.
资助项目	Research Instruments and Equipment Development Project of the Chinese Academy of Sciences, China[YJKYYQ20190054] ; National Natural Science Foundation of China[41730103] ; National Natural Science Foundation of China[41575030] ; National Natural Science Foundation of China[41475023]
WOS关键词	MODULATION SPECTROSCOPY ; NITRIC-OXIDE
WOS研究方向	Physics
语种	英语
出版者	CHINESE PHYSICAL SOC
WOS记录号	WOS:000796323800011
资助机构	Research Instruments and Equipment Development Project of the Chinese Academy of Sciences, China ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/130955]
专题	中国科学院合肥物质科学研究院
通讯作者	Mei Jiao-Xu
作者单位	1.Univ Sci & Technol China, Hefei 230026, Peoples R China 2.Chinese Acad Sci, Hefei Inst Phys Sci, Anhui Inst Opt & Fine Mech, Hefei 230031, Peoples R China 3.Anhui Univ Sci & Technol, State Key Lab Min Response & Disaster Prevent & C, Huainan 232001, Peoples R China
推荐引用方式 GB/T 7714	Jia Feng-Ming,Mei Jiao-Xu,Wang Rui-Feng,et al. Optimization of distribution of permanent magnetrings for Faraday rotation spectroscopy[J]. ACTA PHYSICA SINICA,2022,71.
APA	Jia Feng-Ming,Mei Jiao-Xu,Wang Rui-Feng,Cheng Gang,Liu Kun,&Gao Xiao-Ming.(2022).Optimization of distribution of permanent magnetrings for Faraday rotation spectroscopy.ACTA PHYSICA SINICA,71.
MLA	Jia Feng-Ming,et al."Optimization of distribution of permanent magnetrings for Faraday rotation spectroscopy".ACTA PHYSICA SINICA 71(2022).