Speaker
Description
Nb3Sn promises better RF performance (higher Q and Eacc) than Nb at any given temperature because of superior superconducting properties. Since the Nb3Sn-coated cavities can operate at 4.3 K compared to 2 K for Nb, the demand for high-performing Nb3Sn-cavities is significantly growing for multiple accelerator applications. These cavities are produced routinely by growing a few microns thick Nb3Sn films inside Nb cavities via the tin vapor diffusion technique. Although continuous research and development in the last decade have notably enhanced the material's performance, there is still a long way to realize the material's full potential. Aiming at favorable surfaces that could enhance the RF performance, many coatings were produced and tested at JLab. The combined material and RF studies are in progress to better understand the interplay between coating growth parameters, surface characteristics, and performance of Nb3Sn. This talk will present the status of Nb3Sn-coated single-cell and multi-cell cavity development, including material and RF studies. This talk will also provide an overview of different projects progressing at JLab, to develop and use Nb3Sn for SRF accelerator application.
