Fig. 1. Insertion Device Hybrid Permanent Magnet Undulators (HPMU)Superconducting Undulators (SCU)Intermediate-Energy X-ray Undulators (IEX)Circularly Polarized Undulator (CPU)RevolversInsertion Devices by SectorAPS Device InstallationsOn-Axis Brilliance Tuning Curves - Existing UndulatorsOn-Axis Brilliance Tuning Curves - Various Lengths