Proceedings of the 18th International Conference on RF Superconductivity
18th International Conference on RF Superconductivity, 17-21 July, 2017, Lanzhou, China
A theory of surface resistance of superconductor was rigorously formulated by Bardeen, Cooper, Schrieffer more than 50 years ago. Since then the accelerator community has been used the theory as a guideline to improve the surface resistance of the superconducting cavity. It has been observed that the surface resistance is dependent on frequency, temperature and rf field strength, and surface preparation. To verify these dependences, a well-controlled study is required. Although many different types of cavities have been tested, the typical superconducting cavities are built for specific frequencies of their application. They do not provide data other than at its own frequency. A superconducting half wave cavity is a cavity that enables us to collect the surface resistance data across frequencies of interest for particle accelerators and evaluate preparation techniques. This paper will present the design of the half wave cavity, its electromagnetic mode characteristics and experimental results.
Original Publication Citation
Park, H., De Silva, S., & Delayen, J. R. (2018). Measurement of frequency, temperature, RF field dependent surface resistance using superconducting half wave cavity. In V.R.W. Schaa, Y. He, L. Li, & N. Zhao (Eds.), Proceedings of the 18th International Conference on RF Superconductivity (pp. 925-927). Joint Accelerator Conferences Website. https://doi.org/10.18429/JACoW-SRF2017-THPB080
0000-0002-4809-9439 (De Silva)
Park, Hyekyoung; De Silva, Subashini; Delayen, Jean R.; Schaa, Volker R.W. (Ed.); He, Yuan (Ed.); Li, Lu (Ed.); and Zhao, Ning (Ed.), "Measurements of Frequency, Temperature, RF Field Dependent Surface Resistance Using Superconducting Half-Wave Cavity" (2018). Physics Faculty Publications. 672.