Design Optimization, Series Production, and Testing of the SIS100 Superconducting Magnets for FAIR

SIS100, the core machine of the FAIR project, is being realized now, with the dipole series already ordered. This machine uses fast ramped superconducting dipole magnets (4 T/s, 1 Hz operation cycle), which were optimized to reduce the ac loss and to provide adequate end fields. We present the actual status of the design optimization for the superconducting main magnets as well as of the corrector magnet units. Their series production is now launched and the testing strategy is clarified. The key issues of ac loss minimization, hydraulic resistance, and test facility built is discussed.