Superconducting Undulators at the Advanced Photon Source: High Brightness X-rays for Today and the Future

The first prototype superconducting undulator (SCU0) at the Advanced Photon Source (APS) has been delivering 80-100 keV photons for user science since Jan. 2013. Installation and commissioning was preceded by a decade of R&D and physics and engineering design. A second SCU is planned to be installed later this year. The successful performance of SCUs hold great promise for the APS Upgrade as well as future upgrades of other light sources such as the Linac Coherent Light Source, an X-ray free electron laser at Stanford Linear Accelerator Center (SLAC). I will describe the design, performance, and operation of SCU0 from the accelerator perspective.