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Tunable segmented ring magnet and method of manufacture

  • US 4,538,130 A
  • Filed: 04/23/1984
  • Issued: 08/27/1985
  • Est. Priority Date: 04/23/1984
  • Status: Expired due to Fees
First Claim
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1. A tunable segmented ring magnet extending along a magnet axis perpendicular to the plane of the ring configuration thereof, and defining a torus surrounding an interior space, said magnet producing a preselected magnetic field within said interior space transverse to said magnet axis, said magnet comprisingA. a first plurality of inner magnet segments, each of said inner magnet segments being formed of a permanant magnetic material having essentially linear behavior in the second quadrant of the B-H curve and having an easy axis of magnetization in a predetermined orientation,B. a second plurality of outer magnet segments located radially outward from said inner magnet segments, each of said outer magnet segments being formed of a permanant magnetic material having essentially linear behavior in the second quadrant of the B-H curve and having an easy axis of magnetization in a predetermined orientation, andC. tuning means for moving at least one said magnet segment radially relative to said ring to produce a preselected transverse magnetic field in said interior space.

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