Document Type

Conference Paper

Publication Date




Publication Title

NAPAC2022: Proceedings of the North American Particle Accelerator Conference



Conference Name

North American Particle Accelerator Conference, 7-12 August 2022, Albuquerque, New Mexico


Nb3Sn is a next-generation superconducting material for the accelerator cavities with higher critical temperature and superheating field, both twice compared to Nb. It promises superior performance and higher operating temperature than Nb, resulting in significant cost reduction. So far, the Sn vapor diffusion method is the most preferred and successful technique to coat niobium cavities with Nb3Sn. Although several post-coating techniques (chemical, electrochemical, mechanical) have been explored to improve the surface quality of the coated surface, an effective process has yet to be found. Since there are only a few studies on the post-coating heat treatment at lower temperatures, we annealed Nb3Sn-coated samples at 800 C - 1000 C to study the effect of heat treatments on surface properties, primarily aimed at removing surface Sn residues. This paper discusses the systematic surface analysis of coated samples after annealing at temperatures between 850 C and 950 C.


Published by JACoW Publishing under the terms of the Creative Commons Attribution 4.0 International (CC BY 4.0) 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. (2022). Lower temperature annealing of vapor diffused Nb3Sn for accelerator cavities. In S. Biedron, E. Simakov, S. Milton, P.M. Anisimov, V.R.W. Schaa (Eds.), NAPAC2022: Proceedings of the North American Particle Accelerator Conference. (pp. 695-698) JACoW.


0000-0001-7212-3550 (Tiskumara)