发明授权
- 专利标题: Apparatus for unilateral generation of a homogeneous magnetic field
- 专利标题(中): 用于单向产生均匀磁场的装置
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申请号: US605950申请日: 1984-05-01
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公开(公告)号: US4721914A公开(公告)日: 1988-01-26
- 发明人: Eiichi Fukushima , Alan R. Rath , Stephen B. W. Roeder
- 申请人: Eiichi Fukushima , Alan R. Rath , Stephen B. W. Roeder
- 申请人地址: DC Washington
- 专利权人: The United States of America as represented by the United States Department of Energy
- 当前专利权人: The United States of America as represented by the United States Department of Energy
- 当前专利权人地址: DC Washington
- 主分类号: G01R33/38
- IPC分类号: G01R33/38 ; G01R33/3875 ; H01F7/20 ; G01R33/20
摘要:
An apparatus for unilaterally producing a substantially homogeneous magnetic field. The apparatus includes two circular electromagnet coils, a small coil and a large coil, which are coaxial with one another and which are separated by a distance equal to one-half the difference in the radius of the two coils. By appropriate selection of electrical currents, which are passed through the coil in opposite directions, a region of homogeneous magnetic field is formed. This region is centered on the common axis of the two coils, at a point on the axis which is at a distance from the small coil equal to one-half the radius of the small coil, and which is on the opposite side of the small coil from the large coil. The apparatus has particular application in the field of diagnostic medical NMR and other NMR applications.