Development of Superconducting Undulators at ACCEL

The development of superconducting undulators started with mock‐up models and winding tests to establish a stable coil configuration. Subsequently, specialised design and elaborate fabrication methods have been established at ACCEL to promote the undulators for applications in synchrotron radiation sources. The following paper addresses the inherent challenges of cryogenics, superconductivity, and ultra high vacuum met during the production of superconducting undulators. It covers also the precise measurement techniques of the magnetic field necessary for the quality assessment of the completed undulator device. Superconducting undulator magnets are nowadays a very promising step forward in the development of present and future storage ring‐ or linear accelerator‐based synchrotron radiation sources and free electron lasers.