A Novel Short-Period High-Field HTS Undulator Based on (0001)<11-20> Textured Dysprosium Poles

Synchrotron radiation facilities provide critical capabilities to thousands of users. The growing demand for higher-brilliance hard X-ray sources pushes the performance envelope of standard in-vacuum insertion devices to the fundamental limit of the technology. Shorter period, higher field undulators would enable a significant improvement in brightness, spectral resolution, and spatial resolution of the synchrotron light at hard x-ray wavelengths. This project will combine high temperature superconductivity with the unique ferromagnetic properties of dysprosium metal to develop an ultra-short period, high field undulator. In Phase I, a fabrication procedure will be developed to produce textured dysprosium poles of high magnetic quality in a cost effective way, to enable development of the proposed novel insertion devices on a practical scale. Commercial Applications and other Benefits as described by the awardee: The technology should significantly enhance the capabilities of moderate-energy light sources to better serve the growing needs of synchrotron radiation users.