Magnet structure for particle acceleration

  • US 7,656,258 B1
  • Filed: 08/09/2006
  • Issued: 02/02/2010
  • Est. Priority Date: 01/19/2006
  • Status: Active Grant
First Claim
Patent Images

1. A magnet structure for use in an ion accelerator comprising:

  • a cold-mass structure including;

    at least two coils that comprise a material that is superconducting at a nominal temperature of 4.5 K and that radially circumscribe an acceleration chamber and a segment of a central axis extending across the acceleration chamber, wherein a median acceleration plane extends orthogonally from the central axis across the acceleration chamber; and

    a bobbin in which the coils are mounted, the bobbin including a pair of outer wings to support the coils in an outward radial direction and an inner wing between the coils and intersecting the median acceleration plane to support the coils in an inward axial direction;

    a cryostat enclosing the cold-mass structure;

    a dry cryocooler coupled with the cold-mass structure to cool the coils;

    radial-tension links coupled with the bobbin and applying outward radial tension on the bobbin at a plurality of positions; and

    a magnetic yoke wrapped around the cold-mass structure, circumscribing the segment of the central axis, and including a pair of poles having tapered inner surfaces that define a pole gap between the poles and across the acceleration chamber.

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