Beam soft ramping control of Hefei light source storage ring

HLS (Hefei Light Source) is a second generation synchrotron radiation light source. After injected into the storage ring at energy of 200MeV, beam will be ramped to 800MeV. At first, the accelerator physics analysis about the ramping process is described. After the structure diagram of HLS storage ring's main P.S. control system is shown, the ramping table calculation and the ramping process control are described in detail. Operation of HLS shows that the method of beam soft ramping is flexible and effective, and can satisfy the demands of HLS machine operation.