Patent ID: 9095040
Filing Date: 2015-07-28
Classification: H05H

Abstract:
1. An apparatus for tumor therapy using charged particles, the charged particles accelerated by a rounded corner polygon synchrotron, said synchrotron comprising: a center; and a charged particle circulation beam path running; wherein each of said turning sections comprises at least four bending magnets, said four bending magnets comprising at least eight edge focusing surfaces, wherein geometry of said edge focusing surfaces focuses the charged particles in said charged particle circulation beam path during use, wherein said eight edge focusing surfaces occur within ninety degrees of turn in an acceleration path of said synchrotron, wherein at least two of said four bending magnets further comprise a magnetic field focusing section, said focusing section comprising: substantially uniform solid magnet core geometry tapering from a first cross-sectional area extending from opposite sides of a first winding about said core to a second cross-sectional area, said second cross-sectional area comprising less than two-thirds of an area of said first cross-sectional area, said second cross-sectional area comprising a surface of said magnet core proximate and about parallel to a first side of a gap, the first side of the gap and a second side of the gap comprising parallel sides on opposite sides of the charged particle beam path, the parallel sides (a) parallel to a force vector, F, and (b) perpendicular to a magnetic field vector, B, where the force vector and the magnetic field vector form a plane axially crossing the charged particle beam path.