Strong, stray static magnetic fields

被引:15
|
作者
Marble, Andrew E. [1 ]
机构
[1] St Francis Xavier Univ, Dept Engn, Antigonish, NS B2G 2W5, Canada
关键词
Halbach magnets; magnetic dipoles; static magnetic fields; unilateral magnetic resonance;
D O I
10.1109/TMAG.2008.918278
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
This paper considers the generation of a strong stray magnetic field using rare-earth permanent magnets. Generating a strong field in a region displaced from a magnet is considered here in the context of magnetic resonance hardware design; however, optimizing magnetic field strength is of broad utility in many areas. The local magnetization direction in a permanent magnet is related to the field strength at a position outside of the magnet. This local direction can be optimized to obtain the strongest field. The paper derives, for a magnet of fixed volume, expressions for the dimensions yielding the strongest field. It discusses practical magnet arrangements that approximate the ideal magnetization pattern and demonstrates that a field greater that 80% of the optimal value can be obtained from a relatively simple arrangement of magnetized blocks.
引用
收藏
页码:576 / 580
页数:5
相关论文
共 50 条
  • [1] THE REALIZATION OF STRONG, STRAY STATIC MAGNETIC FIELDS
    Zezulka, Vaclav
    Straka, Pavel
    [J]. ACTA GEODYNAMICA ET GEOMATERIALIA, 2012, 9 (01): : 71 - 77
  • [2] Safety of strong, static magnetic fields
    Schenck, JF
    [J]. JOURNAL OF MAGNETIC RESONANCE IMAGING, 2000, 12 (01) : 2 - 19
  • [3] Strong stray fields in systems of giant magnetic anisotropy magnets
    Samofalov, V. N.
    Belozorov, D. P.
    Ravlik, A. G.
    [J]. PHYSICS-USPEKHI, 2013, 56 (03) : 269 - 288
  • [4] Strong magnetic stray fields in systems of highly anisotropic magnets
    Samofalov, VN
    Ravlik, AG
    Belozorov, DP
    Avramenko, BA
    [J]. PHYSICS OF METALS AND METALLOGRAPHY, 2004, 97 (03): : 235 - 243
  • [5] Melanophore aggregation in strong static magnetic fields
    Testorf, MF
    Öberg, PÅ
    Iwasaka, M
    Ueno, S
    [J]. BIOELECTROMAGNETICS, 2002, 23 (06) : 444 - 449
  • [6] STRAY MAGNETIC FIELDS
    GIOVANEL.J
    [J]. AUDIO, 1969, 53 (01): : 2 - +
  • [7] Effects of strong static magnetic fields on nerve excitation
    Sekino, Masaki
    Tatsuoka, Hozumi
    Yamaguchi, Sachiko
    Eguchi, Yawara
    Ueno, Shoogo
    [J]. IEEE TRANSACTIONS ON MAGNETICS, 2006, 42 (10) : 3584 - 3586
  • [8] Myotube orientation using strong static magnetic fields
    Sakurai, Tomonori
    Hashimoto, Ayumi
    Kiyokawa, Tomoko
    Kikuchi, Kazuki
    Miyakoshi, Junji
    [J]. BIOELECTROMAGNETICS, 2012, 33 (05) : 421 - 427
  • [9] Exposure to Static and Time-Varying Magnetic Fields From Working in the Static Magnetic Stray Fields of MRI Scanners: A Comprehensive Survey in the Netherlands
    Schaap, Kristel
    Christopher-De Vries, Yvette
    Crozier, Stuart
    De Vocht, Frank
    Kromhout, Hans
    [J]. ANNALS OF OCCUPATIONAL HYGIENE, 2014, 58 (09): : 1094 - 1110
  • [10] Influence of strong static magnetic fields on primary cortical neurons
    Prina-Mello, A
    Farrell, E
    Prendergast, PJ
    Campbell, V
    Coey, JMD
    [J]. BIOELECTROMAGNETICS, 2006, 27 (01) : 35 - 42