Design of the Superconducting Magnet System for a 28-GHz ECR Ion Source of RAON Accelerator

Abstract

The linear accelerator, RAON, has been being developed as a part of the Rare Isotope Science Project (RISP) at Institute for Basic Science (IBS) in the Republic of Korea. In this paper, it is dealt with the design of a low Tc superconducting magnet system for an electron cyclotron resonance (ECR) ion source to utilize a 28-GHz radio frequency source. The superconducting magnet system for a 28-GHz ECR ion source consists of four solenoid coils and six saddle coils (a sextupole coil) (Taylor et al. IEEE Trans. Appl. Supercond. 10, 224–227, 2000). The detail specifications of each superconducting coil are designed by analyzing magnetic field to enhance the efficiency of beam extraction and electromagnetic force to improve the mechanical stability of a superconducting coil by using finite elements method (FEM) simulation. The definitive design parameters for manufacturing the superconducting magnet system for a 28-GHz ECR ion source of RAON accelerator are suggested considering electromagnetic characteristics.