MEASUREMENT OF LATTICE PARAMETERS DURING THE ENERGY RAMPING AT STORAGE RING

Abstract Table I. The nominal parameters for the storage ring The spectrum of the 1.3 GeV storage ring at SRRC can provide ultra-violet to soft x-ray radiation source to the potential users. Energy ramping of the storage ring can push the critical photon energy to the edge of hard x-ray. There are several ways to ramp the electron energy, for example, increasing the extraction energy to 1.5 GeV at booster directly, ramping the magnets ' power supplies with synchronized function generators, or software ramping of magnets at storage ring, etc. The tune drifting, during the ramping procedure, is expected and should be minimized such that the beam can survive through the ramping process. The betatron frequencies and ramping function of magnets were carefully monitored in order to avoid the betatron tunes cross the resonance line. A successful ramping results and some lattice parameters was measured and discussed in this paper. Nominal energy 1.3 GeV Natural beam emittance [2] 1.92 x 10-8 rad m Radiation loss per turn (dipole) 72.28 keV Critical photon energy 1.39 keV photon flux (at critical energy