Patent ID: 7446490
Filing Date: 2008-11-04
Classification: H05H

Abstract:
1. A cyclotron capable of producing a beam of accelerated charged particles intended for the irradiation of at least one target, said cyclotron comprising a magnetic circuit that is essentially comprised of: an electromagnet with at least two poles, an upper pole and a lower pole, said poles being disposed symmetrically with relation to a median plane that is perpendicular to the central axis of the cyclotron, and separated by a gap where charged particles and flux returns circulate to close said magnetic circuit; a pair of main induction coils for creating an essentially constant main induction field in the gap, between said poles, characterized in that it comprises means for centering said beam comprising at least one pair of bucking coils powered by a power supply and capable of modulating the intensity of the main induction field by said main coils in order to obtain an increase in the intensity of the induction field in a first area of the cyclotron and a reduction in intensity of the induction field in a second area of the cyclotron that is diametrically opposed with relation to the central axis of the cyclotron.