Cylindrical permanent-magnet structures using images in an iron shield
Peng QL(彭全岭); Peng, QL; McMurry, SM; Coey, JMD
刊名IEEE TRANSACTIONS ON MAGNETICS
2003
卷号39期号:4页码:1983-1989
关键词Halbach cylinders magnetic image effects magnetic shielding permanent-magnet flux sources
学科分类Engineering; Physics
DOI10.1109/TMAG.2003.814286
通讯作者Chinese Acad Sci, Inst High Energy Phys, Beijing 100039, Peoples R China ; Trinity Coll Dublin, Dept Phys, Dublin 2, Ireland
文章类型Article
英文摘要We report on cylindrical permanent-magnet structures that exploit the image effect in a surrounding circular soft-iron sheath. We present the theory for a general multipole ring, where the polarization direction alpha = (n + 1)psi, n is a positive or negative integer, and psi is the angular coordinate. For the uniformly magnetized case n = -1, a long cylindrical ring produces no field in its bore, and the field outside the cylinder is that of a linear dipole. When surrounded by the sheath, the field becomes uniform in the bore and zero outside the cylinder. Higher multipole fields can similarly be transformed from outward fields to inward fields by using the sheath. The field can be varied continuously by moving the sheath. We describe a small variable-field device using a Nd-Fe-B cylinder that produces a flux density of 0-400 mT.
类目[WOS]Engineering, Electrical & Electronic ; Physics, Applied
研究领域[WOS]Engineering ; Physics
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语种英语
WOS记录号WOS:000184309300001
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文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/239604
专题中国科学院高能物理研究所_加速器中心_期刊论文
中国科学院高能物理研究所_加速器中心
作者单位中国科学院高能物理研究所
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GB/T 7714
Peng QL,Peng, QL,McMurry, SM,et al. Cylindrical permanent-magnet structures using images in an iron shield[J]. IEEE TRANSACTIONS ON MAGNETICS,2003,39(4):1983-1989.
APA 彭全岭,Peng, QL,McMurry, SM,&Coey, JMD.(2003).Cylindrical permanent-magnet structures using images in an iron shield.IEEE TRANSACTIONS ON MAGNETICS,39(4),1983-1989.
MLA 彭全岭,et al."Cylindrical permanent-magnet structures using images in an iron shield".IEEE TRANSACTIONS ON MAGNETICS 39.4(2003):1983-1989.
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