Document Type

Conference Paper

Publication Date




Publication Title

Proceedings of the 19th International Conference on RF Superconductivity



Conference Name

19th International Conference on RF Superconductivity, June 30th - July 5th, 2019, Dresden, Germany


Achieving ever decreasing surface resistance at higher field in superconducting RF accelerating structures is one of most outstanding developments in modern accelerators. The BCS theory has been used widely to estimate the surface resistance and to direct the technology. However, recent research results show that the behavior of the surface resistance further deviates from the BCS theory. So far the study on surface resistance was performed usually with cavities of single frequency which limited the study of frequency dependent surface resistance. The Center for Accelerator Science at Old Dominion University has designed and built several half wave coaxial cavities to study the frequency, temperature, and RF field dependence of surface resistance. TRIUMF in Canada also joined this line of research using such multi frequency quarter wave and half wave coaxial cavities. This type of multi mode cavity will allow us to systematically study the parameters affecting surface resistance on the same cavity surface. In this paper, we review the results ODU and TRIUMF collected so far and proper analysis methods.


Published by JACoW Publishing under the terms of the Creative Commons Attribution 3.0 Unported (CC BY 3.0) 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

Park, H., De Silva, S. U., & Delayen, J. R. (2019). Measurement of surface resistance properties with coaxial resonators - Review. In P. Michel, A. Arnold, & V.R.W. Schaa (Eds.), Proceedings of the 19th International Conference on RF Superconductivity (pp. 374-380). Joint Accelerator Conferences Website.


0000-0002-4809-9439 (De Silva)