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Compensated precessional beam extraction for cyclotrons

  • US 8,581,525 B2
  • Filed: 03/23/2012
  • Issued: 11/12/2013
  • Est. Priority Date: 03/23/2012
  • Status: Active Grant
First Claim
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1. A cyclotron comprising:

  • a pair of magnetic coils encircling a central axis and positioned on opposite sides of a median acceleration plane;

    a magnetic yoke encircling the central axis and including a return yoke that crosses the median acceleration plane and a first and second pole on opposite sides of the median acceleration plane; and

    a series of magnetic extraction bumps extending in series from the central axis on opposite sides of the median acceleration plane, wherein the extraction bumps are positioned non-axially symmetrically across distinct radial distances from the central axis and separated from each other by radial gaps such that the extraction bumps are configured to displace an ion that is accelerating through the median acceleration plane in an outwardly expanding orbit about the central axis out of its orbit and out of the cyclotron.

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