On-line optimization of isochronous field of separated-sector cyclotron

This paper introduces the design and optimization of the isochronous field of separated-sector cyclotron (SSC) in the cooling storage ring of the Heavy Ion Accelerator in Lanzhou (HIRFL-CSR). Based on the HIRFL-CSR main Oracle database system, the main interface of the control system is designed. Through this interface, the values of power supply current can be given and read, and the beam phase information can be updated in real time. The isochronous magnetic field model is established by Kb-Kr and Lagrange methods, and the field is optimized on the basis of the actual phase measurement. The optimization of the isochronous field improves the beam quality by effective control of the drift of beam phase.