Magnet Design For HLS Storage Ring Upgrade Project

HLS(Hefei Light Source)is a dedicated synchrotron radiation research facility, whose emittance is relatively large(160nmrad). In order to improve the performance of HLS, especially getting higher brilliance synchrotron radiation and increasing the number of straight sections for insertion devices, an upgrade project will be proceeded soon. The storage ring lattice, which has a DBA structure with 4 super-periods, comprises 8 dipoles, 32 quadrupoles and 32 combined function sextupoles.The magnet system is one of the important parts of the accelerator. All of the magnet would be redesigned and fabricated to satisfy the needs of the new ring. The thesis put emphasis on the process of the magnet design and the qualities analysing of the magnetic field. The combined function sextupole is the first one designed and fabricated in China.The thesis also summarized the basic concepts and the theoretical basis of the magnet design.