JACoW is a publisher in Geneva, Switzerland that publishes the proceedings of accelerator conferences held around the world by an international collaboration of editors.
TY - UNPB AU - Ciovati, G. AU - Anderson, J.P. AU - Balachandran, S. AU - Cheng, G. AU - Coriton, B.R.L. AU - Daly, E.F. AU - Dhakal, P. AU - Gurevich, A.V. AU - Harding, K.A. AU - Holland, L.D. AU - Marhauser, F. AU - McLaughlin, K.R. AU - Packard, D.A. AU - Powers, T. AU - Pudasaini, U. AU - Rathke, J. AU - Rimmer, R.A. AU - Schultheiss, T. AU - Vennekate, H. AU - Vollmer, D.M. ED - Saito, Kenji ED - Xu, Ting ED - Sakamoto, Naruhiko ED - Schaa, Volker R.W. ED - Thomas, Paul W. TI - Development of a Prototype Superconducting Radio-Frequency Cavity for Conduction-Cooled Accelerators J2 - Proc. of SRF2023, Grand Rapids, MI, USA, 25-30 June 2023 CY - Grand Rapids, MI, USA T2 - International Conference on RF Superconductivity T3 - 21 LA - english AB - Recent progress in the development of high-quality Nb₃Sn film coatings along with the availability of cryocoolers with high cooling capacity at 4 K makes it feasible to operate SRF cavities cooled by thermal conduction at relevant accelerating gradients for use in accelerators. We have developed a prototype single-cell cavity to prove the feasibility of operation up to the accelerating gradient required for 1 MeV energy gain, cooled by conduction with cryocoolers. The cavity has a ~3 ¿m thick Nb₃Sn film on the inner surface, deposited on a ~4 mm thick bulk Nb substrate and a bulk ~7 mm thick Cu outer shell with three Cu attachment tabs. The cavity was tested up to a peak surface magnetic field of 53 mT in liquid He at 4.3 K. A horizontal test cryostat was designed and built to test the cavity cooled with three cryocoolers. The rf tests of the conduction-cooled cavity achieved a peak surface magnetic field of 50 mT and stable operation was possible with up to 18.5 W of rf heat load. The peak frequency shift due to microphonics was 23 Hz. These results represent the highest peak surface magnetic field achieved in a conduction-cooled SRF cavity to date PB - JACoW Publishing CP - Geneva, Switzerland ER -