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Linear and nonlinear optics studies in the anka storage ring

The ANKA electron storage ring operates in the energy range from 0.5 to 2.5 GeV. In order to improve machine performance a precise modelling of linear and nonlinear optics is mandatory. At the maximum energy, the dipole magnets show multipolar components due to saturation effects. A new optics model should take higher order fields of the installed magnets into account. In the framework of the model upgrade, extensive optics studies have been done, including a study of the beta function beating and a measurement of higher order chromaticity. Furthermore an energy calibration of the storage ring was done.