Document Type

Conference Paper

Publication Date

2023

DOI

10.18429/JACoW-SRF2023-TUPTB020

Publication Title

Proceedings of the 21st International Conference on RF Superconductivity

Pages

428-432

Conference Name

21st International Conference on RF Superconductivity, June 25-30, 2023, Grand Rapids, Michigan

Abstract

Nb₃Sn is a next-generation superconducting material that can be used for future superconducting radiofrequency (SRF) accelerator cavities, promising better performance, cost reduction, and higher operating temperature than Nb. The Sn vapor diffusion method is currently the most preferred and successful technique to coat niobium cavities with Nb₃Sn. Among post-coating treatments to optimize the coating quality, higher temperature annealing without Sn is known to degrade Nb₃Sn because of Sn loss. We have investigated Nb₃Sn/Nb samples briefly annealed at 800-1000 °C, for 10 and 20 minutes to potentially improve the surface to enhance the performance of Nb₃Sn-coated cavities. Following the sample studies, a coated single-cell cavity was sequentially annealed at 900 °C and tested its performance each time, improving the cavity’s quality factor relatively. This paper summarizes the sample studies and discusses the RF test results from sequentially annealed SRF Nb₃Sn/Nb cavity.

Rights

© 2023 The Authors.

Content from this work may be used under the terms of the Creative Commons Attribution 4.0 International (CC BY 4.0) licence. Any distribution of this work must maintain attribution to the authors, title of the work, publisher, and DOI.

Comments

The DOI to this article does not currently resolve as of September 2023. The publisher will develop a landing page and correct this in the future.

Original Publication Citation

Tiskumara, J. K., Delayen, J. R., Pudasaini, U., Eremeev, G. (2023). Surface properties and RF performance of vapor diffused Nb3Sn on NB after sequential anneals below 1000 °C. In K. Saito, T. Xu, N. Sakamoto, V. R. W. Schaa, & P. Thomas (Eds.), Proceedings of the 21st International Conference on RF Superconductivity (pp. 428-432). JACoW Publishing. https://srf2023.vrws.de/papers/tuptb020.pdf

ORCID

0000-0001-7212-3550 (Tiskumara)

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