Design of a Combined Function Magnet With Individually Adjustable Functions

Design of combined function magnets for accelerators is often limited to minor modifications of the existing components, maintaining the high quality of the main harmonic field component, but restricting the range of operation. We investigate the possibility to achieve a wide range of both steering magnetic flux density and focusing field gradients, by utilizing two individually powered magnet parts. A general design methodology is presented, enabling fully customized design and optimization of magnets for different applications. The design procedure is illustrated via a detailed design of a magnet proposed for application in the stripping extraction system of a multipurpose cyclotron.