Speaker
Description
Compact high-intensity cyclotrons are increasingly important for isotope production worldwide. The SK1000 is a proposed superconducting cyclotron designed to accelerate H₃⁺ ions to 120 MeV/u. It features a large main magnet with a height of 2.99 m, a diameter of 7.58 m, and an outer sector radius of 2.25 m. The manufacturing and installation of a magnet of this scale inevitably introduce field imperfections. This study investigates the effects of such magnetic field errors on beam dynamics to inform magnet mapping and shimming strategies. Through combined analytical and numerical simulations, we establish tolerance limits for magnetic field errors. Special attention is given to the resonances νᵣ = 1, driven by first harmonic field errors, which lead to radial emittance growth. Resonances contributing to vertical emittance growth are also examined. Finally, we present the maximum allowable magnetic field errors that ensure stable beam operation in the SK1000 cyclotron.
Funding Agency
This work was supported by the Science and Technology Program of Gansu Province under Grant No. 23ZDFA014.
