STUDIES OF THE FIELD DISTRIBUTION OF THE MODULATING WIDTH MULTIPOLE PERMANENT MAGNETS

XU Jian-Ming; WU Qing

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《中国物理C》（英文）编辑部

2024年10月30日

Chinese Physics C> 1987, Vol. 11> Issue(3) : 369-375

STUDIES OF THE FIELD DISTRIBUTION OF THE MODULATING WIDTH MULTIPOLE PERMANENT MAGNETS

XU Jian-Ming ^, ,
WU Qing

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Abstract：
In this paper,the magnetic field distribution of the modulating width multipole permanent magnets is analyzed. Only radially magnetized permanent magnet segments are used and the required magnetic field is formed by modulating the widths of the segments in this project. In 2-dimensional ideal case pure 2N-pole magnetic field can be formed. The spatial expressions of the scalar potential for the ideal and real 2-dimensional cases are given. And the methods for reducing the undesirable higher harmonics of the magnetic field in the real case are also discussed.

References

[1]	徐建铭等, 一种永磁多极磁体的新型设计专利申请号55106663, 申请日期85年9月4日.[2] 徐清等, 原子能科学技术, Vol. 20, No. 6 (1986).

[1]	CUI Bao-Qun , TANG Bing , MA Yin-Jun , MA Rui-Gang , JIANG Cong , CHEN Li-Hua , JIANG Wei-Sheng . A Permanent Magnet Ion Source with Adjustable Magnetic Field. Chinese Physics C, 2008, 32(S1): 280-282.
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[4]	LI Gang , ZHU Yong-Sheng , WANG Zhi-Yong . A Generator for Multipole Analysis of ψ′→γ′χ_cJ→γ′γJ/ψ. Chinese Physics C, 2006, 30(8): 718-723.
[5]	SUN Liang-Ting , ZHAO Hong-Wei . Study on Designing of Hexapole Magnet of ECR Ion Source. Chinese Physics C, 2004, 28(6): 644-649.
[6]	PENG Quan-Ling , ZHAO Qi . Using Axial Magnetized Permanent Rings to Build Axial Gradient Magnetic Field. Chinese Physics C, 2003, 27(4): 363-366.
[7]	SHI Cai-Tu , WANG Mo-Tuo , JING Yu-Hui , LI Da-Shi , CHEN Ji , PENG Quan-Ling . Design and Construction of Multipoles Wiggler in BEPC. Chinese Physics C, 2003, 27(S1): 129-133.
[8]	Tang Esheng , Huang Yuying , Wu Yingrong , Yi Futing . Radiation Character of 3W1 Permanent Magnet Multipole Wiggler. Chinese Physics C, 1998, 22(10): 951-954.
[9]	HUANG Min , LI Yong-Gui , WU Qing-Wu , ZHUANG Jie-Jia . The Determination of Magnetization Vector of NdFeB Rectangular Permanent Magnet Used for Wiggler. Chinese Physics C, 1991, 15(9): 776-783.
[10]	XU Jian-Ming , XU Qing . ANALYSIS OF THE PERFORMANCE OF A NEW TYPE OF LINEAR PERIODIC MAGNETS. Chinese Physics C, 1988, 12(4): 513-520.
[11]	SUN Chen-Ren , LIN Shu-Yan , MAO Nai-Feng , SI Guo-Jian , WU Deng-Xi . MEASUREMENT OF LOW MAGNETIC FIELD DISTRIBUTION OF A β SPECTROMETER. Chinese Physics C, 1986, 10(3): 371-373.
[12]	LI Zeng-Hai , MAO Nai-Feng , LIU Lan-Fen , SUN Qin-Ren . SPATIAL DISTRIBUTION OF MAGNETIC FIELD EXPRESSED BY THE FIELD ON MERIDIANAL PLANE. Chinese Physics C, 1986, 10(6): 730-737.
[13]	XU Jian-Ming , XU Qing . A NEW PROJECT OF MULTIPOLE PERMANENT MAGNETS. Chinese Physics C, 1986, 10(1): 120-123.
[14]	LIU Mao-San , SHI Cai-Tu , CHEN Ren-Huai . MAGNETIC FIELD ANALYSIS OF PERMANENT MAGNET UNDULATOR. Chinese Physics C, 1984, 8(1): 59-68.
[15]	LIU MAO-SAN , WU WEN-TAI , LI SHU-SHEN , LIU YU-CHENG , SHI CAI-TU , ZHOU JIE-MIN . ANALYSIS OF TWO DIMENSIONAL FIELDS OF PERMANENT MAGNETIC MULTIPIECE LINEAR ARRAY SYSTEM. Chinese Physics C, 1982, 6(6): 764-767.
[16]	LIU MAO-SAN , WU WEN-TAI , LI SHU-ZHEN , LIU YU-CHENG , SHI CAI-TU , ZHOU JIE-MIN . PLANAR MULTIPOLE FIELD OF A PERMANENT MAGNET SYSTEM WITH QUASI-SEGMENTED AND TRAPEZOIDAL RING STRUCTURE. Chinese Physics C, 1982, 6(2): 251-254.
[17]	LIU MAO-SAN , CHEN REN-HUAI , WU WEN-TAI , LI SHU-ZHEN . ON THE ANALYSIS OF SEGMENTED RING OF PERMANENT MAGNET MULTIPOLE FIELDS. Chinese Physics C, 1981, 5(4): 452-457.
[18]	LIU MAO-SAN , CHEN REN-HUAI , WU WEN-TAI , LI SHU-ZHEN . ON THE ANALYSIS OF SEGMENTED RING PERMANENT MAGNET MULTIPOLE FIELDS. Chinese Physics C, 1981, 5(1): 127-129.
[19]	LIU MAO-SAN , CHEN REN-HUAI , WU WEN-TAI , LI SHU-ZHEN . ON THE ANALYSIS OF MAGNETIC MULTIPOLE FIELD WITH FIXED DIRECTION MAGNETIZED MULTI-SEGMENTED RING STRUCTURE. Chinese Physics C, 1981, 5(5): 623-627.
[20]	Liu Mao-san , Chen Ren-huai , Wu Wen-tai , Li Shu-zhen . PLANAR MULTIPOLE FIELD OF A PERMANENT MAGNET SYSTEM WITH MULTI-SEGMENTED RING STRUCTURE. Chinese Physics C, 1980, 4(6): 774-777.

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XU Jian-Ming and WU Qing. STUDIES OF THE FIELD DISTRIBUTION OF THE MODULATING WIDTH MULTIPOLE PERMANENT MAGNETS[J]. Chinese Physics C, 1987, 11(3): 369-375.

XU Jian-Ming and WU Qing. STUDIES OF THE FIELD DISTRIBUTION OF THE MODULATING WIDTH MULTIPOLE PERMANENT MAGNETS[J]. Chinese Physics C, 1987, 11(3): 369-375. shu

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Received: 1900-01-01
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

STUDIES OF THE FIELD DISTRIBUTION OF THE MODULATING WIDTH MULTIPOLE PERMANENT MAGNETS

XU Jian-Ming ^,
WU Qing

Corresponding author: XU Jian-Ming,

Received Date: 1900-01-01
Accepted Date: 1900-01-01
Available Online: 1987-06-05

Abstract: In this paper,the magnetic field distribution of the modulating width multipole permanent magnets is analyzed. Only radially magnetized permanent magnet segments are used and the required magnetic field is formed by modulating the widths of the segments in this project. In 2-dimensional ideal case pure 2N-pole magnetic field can be formed. The spatial expressions of the scalar potential for the ideal and real 2-dimensional cases are given. And the methods for reducing the undesirable higher harmonics of the magnetic field in the real case are also discussed.