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TY - CONF AU - Ciovati, G. AU - Cheng, G. AU - Daly, E. AU - Eremeev, G.V. AU - Henry, J. AU - Parajuli, I.P. AU - Pudasaini, U. AU - Rimmer, R.A. ED - Michel, Peter ED - Arnold, André ED - Schaa, Volker RW TI - A Multi-layered SRF Cavity for Conduction Cooling Applications J2 - Proc. of SRF2019, Dresden, Germany, 30 June-05 July 2019 CY - Dresden, Germany T2 - International Conference on RF Superconductivity T3 - 19 LA - english AB - Industrial application of SRF technology would favor the use of cryocoolers to conductively cool SRF cavities for particle accelerators, operating at or above 4.3 K. In order to achieve a lower surface resistance than Nb at 4.3 K, a superconductor with higher critical temperature should be used, whereas a metal with higher thermal conductivity than Nb should be used to conduct the heat to the cryocoolers. A standard 1.5 GHz bulk Nb single-cell cavity has been coated with a ~2 µm thick layer of Nb₃Sn on the inner surface and with a 5 mm thick Cu layer on the outer surface for conduction cooled applications. The cavity performance has been measured at 4.3 K and 2.0 K in liquid He. The cavity reached a peak surface magnetic field of ~40 mT with a quality factor of 6×10⁹ and 3.5×10⁹ at 4.3 K, before and after applying the thick Cu layer, respectively. PB - JACoW Publishing CP - Geneva, Switzerland SP - 538 EP - 542 KW - cavity KW - SRF KW - cryogenics KW - ECR KW - niobium DA - 2019/08 PY - 2019 SN - "" SN - 978-3-95450-211-0 DO - doi:10.18429/JACoW-SRF2019-TUP050 UR - http://jacow.org/srf2019/papers/tup050.pdf ER -