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Magnet with Uncoupled Combined Functions

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3 Author(s)
Ristic-Djurovic, J.L. ; Innovation Center, Univ. of Belgrade, Belgrade, Serbia ; Cirkovic, S. ; Ilic, A.Z.

Efficient extraction by ion stripping of a number of ion beams from a multipurpose cyclotron through the same transport line could be achieved with a combined function magnet. Characteristics of a combined magnet used for this purpose are significantly different from those of commonly used combined function magnets. For example, bending and focusing functions must be independently adjustable, beam paths are not centered to the device's axis, only one device is needed per cyclotron, and requirements regarding maximal achievable quadrupole and dipole fields as well as field linearity are not as demanding as for combined function magnets used for other applications. Using two analytical models as well as a simple numerical model, it is shown that two independently powered slanted dipoles, off-centered and arranged symmetrically with respect to the beam area, could efficiently serve as a combined function magnet in the stripping extraction system of a multipurpose cyclotron.

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Nuclear Science, IEEE Transactions on  (Volume:60 ,  Issue: 6 )