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 - CONF
AU - Pudasaini, U.
AU - Reece, C.E.
AU - Tiskumara, J.K.
ED - Saito, Kenji
ED - Xu, Ting
ED - Sakamoto, Naruhiko
ED - Lesage, Ana
ED - Schaa, Volker R.W.
TI - Managing Sn-Supply to Tune Surface Characteristics of Vapor-Diffusion Coating of Nb₃Sn
J2 - Proc. of SRF2021, East Lansing, MI, USA, 28 June-02 July 2021
CY - East Lansing, MI, USA
T2 - International Conference on RF Superconductivity
T3 - 20
LA - english
AB - Nb₃Sn promises better RF performance (Q and E_{acc}) than niobium at any given temperature because of superior superconducting properties. Nb₃Sn-coated SRF cavities are now produced routinely by growing a few microns thick Nb₃Sn films inside Nb cavities via the tin vapor diffusion technique. Sn evaporation and consumption during the growth process notably affect the quality of the coating. Aiming at favorable surface characteristics that could enhance the RF performance, many coatings were produced by varying Sn sources and temperature profiles. Coupon samples were examined using different material characterization techniques, and a selected few sets of coating parameters were used to coat 1.3 GHz single-cell cavities for RF testing. The Sn supply’s careful tuning is essential to manage the microstructure, roughness, and overall surface characteristics of the coating. We summarize the material analysis of witness samples and discuss the performance of several Nb₃Sn-coated single-cell cavities linked to Sn-source characteristics and observed Sn consumption during the film growth process.
PB - JACoW Publishing
CP - Geneva, Switzerland
SP - 516
EP - 521
KW - cavity
KW - SRF
KW - experiment
KW - niobium
KW - factory
DA - 2022/10
PY - 2022
SN - 2673-5504
SN - 978-3-95450-233-2
DO - doi:10.18429/JACoW-SRF2021-TUPTEV013
UR - https://jacow.org/srf2021/papers/tuptev013.pdf
ER -