Document Type

Conference Paper

Publication Date




Publication Title

Proceedings of the 20th International Conference on RF Superconductivity



Conference Name

20th International Conference on RF Superconductivity, June 27th- July 2, 2021, East Lansing, Michigan


The twin axis cavity with two identical accelerating beams has been proposed for energy recovery linac (ERL) applications. Nb3Sn is a superconducting material with a higher critical temperature and a higher critical field as compared to Nb, which promises a lower operating cost due to higher quality factors. Two niobium twin axis cavities were fabricated at JLab and were proposed to be coated with Nb3Sn. Due to their more complex geometry, the typical coating process used for basic elliptical cavi-ties needs to be improved to coat these cavities. This development advances the current coating system at JLab for coating complex cavities. Two twin axis cavities were coated recently for the first time. This contribution dis-cusses initial results from coating of twin axis cavities, RF testing and witness sample analysis with an overview of the current challenges towards high performance Nb3Sn coated twin axis cavities.


Published by JACoW Publishing under the terms of the Creative Commons Attribution 4.0 International license. Any further distribution of this work must maintain attribution to the author(s), the published article's title, publisher, and DOI.

Original Publication Citation

Tiskumara, J.K., Delayen, J.R., Eremeev, G.V., Pudasaini, U., & Reece, C.E. (2021) Nb3Sn coating of twin axis cavity for SRF applications. In K. Saito, T. Xu, N. Sakamoto, A. Lesage, V.R.W. Schaa (Eds.), Proceedings of the 20th International Conference on RF Superconductivity (146-150). JACoW.


0000-0001-7212-3550 (Tiskumara)