Formation of the Magnetic Field in the CC 30/15 Isochronous Cyclotron

Design features of the electromagnet of the CC 30/15 isochronous cyclotron using mathematical modeling methods are presented. The electromagnet of shielded type has a vertically located median plane and the housing of the vacuum chamber is part of the magnetic circuit. To implement the acceleration modes of hydrogen and deuterium ions, rotary shims are used, installed in two opposite valleys, free of the resonance system. The rotary shims provide the speed of rebuilding the magnetic field during the transition from the proton mode of ion acceleration to the deuteron mode. The necessary topology of the magnetic field is formed using an automated measuring complex due the controlled refinement of removable sector overlays and shims.