Transient 3D Finite Element Simulations of the SIS100 Magnet Considering Anisotropic, Nonlinear Material Models for the Ferromagnetic Yoke

During the design and optimization phase of the superconductive dipole magnets for the new SIS100 synchrotron at GSI Darmstadt, numerical simulations are carried out to predict the losses due to eddy currents in the laminated yoke. In order to represent the ferromagnetic iron in the numerical model, homogenized material models accounting for the anisotropy induced by the lamination are applied. For a simplified geometry of the SIS100 dipole magnet, the eddy-current losses obtained using different anisotropic nonlinear material models are compared.