Document Type

Conference Paper

Publication Date




Publication Title

Proceedings of the 21st International Conference on RF Superconductivity



Conference Name

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


Recent advancement in superconducting radio frequency cavity processing techniques, with diffusion of impurities within the RF penetration depth, resulted in high quality factor with increase in quality factor with increasing accelerating gradient. The increase in quality factor is the result of a decrease in the surface resistance as a result of nonmagnetic impurities doping and change in electronic density of states. The fundamental understanding of the dependence of surface resistance on frequency and surface preparation is still an active area of research. Here, we present the result of RF measurements of the TEM modes in a coaxial half-wave niobium cavity resonating at frequencies between 0.3 - 1.3 GHz. The temperature dependence of the surface resistance was measured between 4.2 K and 1.6 K. The field dependence of the surface resistance was measured at 2.0 K. The baseline measurements were made after standard surface preparation by buffered chemical polishing.


© 2023 Content from this work may be used under the terms of the Creative Commons Attribution 4.0 International (CC BY 4.0) license. Any distribution of this work must maintain attribution to the authors, title of the work, publisher, and DOI.

Original Publication Citation

Raut, N. K., Ciovati, G., De Silva, S. U., Delayen, J. R., Dhakal, P., Khanal, B. D., & Tiskumara, J. K. (2023). Temperature, RF field, and frequency dependence performance evaluation of superconducting niobium half-wave coaxial cavity. In K. Saito, T. Xu, N. Sakamoto, V. R. W. Schaa, & P. Thomas (Eds.), Proceedings of the 21st International Conference on RF Superconductivity (pp. 686-690). JACoW.


0000-0002-4809-9439 (De Silva)