Speaker
Description
Nb₃Sn-coated cavities offer a promising route toward energy-efficient superconducting accelerators operating near 4 K with reduced cryogenic requirements. Gray Enid I, a cryomodule containing two five-cell, 1.5 GHz Nb₃Sn-coated niobium cavities, has completed two beam-acceleration campaigns at Jefferson Lab’s Upgraded Injector Test Facility. During the latest campaign, the cryomodule accelerated a continuous-wave electron beam from 200 keV to 7.1 MeV at 4 K, establishing a record beam energy for Nb₃Sn SRF technology. One cavity achieved an accelerating gradient of 11.8 MV/m with an intrinsic quality factor of approximately 4 × 10⁹ at 4.3 K. The accelerated beam was also delivered for a user application, providing an end-to-end demonstration of Nb₃Sn technology from coated multicell cavities and cryomodule integration to stable accelerator operation and practical beam use.