| Autor: |
Eremeev G; SRF R&D, Jefferson Lab, Newport News, Virginia 23606, USA., Clemens W; SRF R&D, Jefferson Lab, Newport News, Virginia 23606, USA., Macha K; SRF R&D, Jefferson Lab, Newport News, Virginia 23606, USA., Reece CE; SRF R&D, Jefferson Lab, Newport News, Virginia 23606, USA., Valente-Feliciano AM; SRF R&D, Jefferson Lab, Newport News, Virginia 23606, USA., Williams S; SRF R&D, Jefferson Lab, Newport News, Virginia 23606, USA., Pudasaini U; Department of Applied Science, College of William and Mary, Williamsburg, Virginia 23187, USA., Kelley M; Department of Applied Science, College of William and Mary, Williamsburg, Virginia 23187, USA. |
| Abstrakt: |
Superconducting radio frequency niobium cavities are the building blocks of modern accelerators for scientific applications. Lower surface resistance, higher fields, and high operating temperatures advance the reach of the future accelerators for scientific discovery as well as potentially enabling cost-effective industrial solutions. We describe the design and performance of an Nb 3 Sn coating system that converts the inner surface of niobium cavities to an Nb 3 Sn film. The niobium surface, heated by radiation from the niobium retort, is exposed to Sn and SnCl 2 vapor during the heat cycle, which results in about 2 μm Nb 3 Sn film on the niobium surface. Film composition and structure as well as radio frequency properties with 1-cell R&D cavities and 5-cell practical accelerator cavities are presented. |
