Computing and Library Services - delivering an inspiring information environment

RF and Surface Properties of Superconducting Samples

Junginger, T., Weingarten, W., Welsch, C. and Seviour, Rebecca (2011) RF and Surface Properties of Superconducting Samples. In: Proceedings of the 2nd International Particle Accelerator Conference IPAC 2011. JACoW, San Sebastian, Spain, pp. 310-312. ISBN 978-92-9083-366-6

PDF - Published Version
Available under License Creative Commons Attribution.

Download (1MB) | Preview


The surface resistance Rs of superconducting cavities can be obtained from the unloaded quality factor Q0. Since Rs varies strongly over the cavity surface its value must be interpreted as averaged over the whole cavity surface. A more convenient way to investigate the surface resistance of superconducting materials is therefore to examine small samples, because they can be manufactured cheaply, duplicated easily and used for further surface analyses. At CERN a compact Quadrupole Resonator has been developed for the RF characterization of superconducting samples at different frequencies. In this contribution, results from measurements on bulk niobium and niobium film on copper samples are presented. It is shown how different contributions to the surface resistance depend on temperature, applied RF magnetic field and frequency. Furthermore, measurements of the maximum RF magnetic field as a function of temperature and frequency in pulsed and CW operation are presented. The study is accompanied by measurements of the surface properties of the samples by various techniques

Item Type: Book Chapter
Subjects: Q Science > Q Science (General)
Q Science > QC Physics
Schools: School of Applied Sciences
Related URLs:
Depositing User: Sara Taylor
Date Deposited: 08 Nov 2012 16:12
Last Modified: 11 Nov 2015 08:00


Downloads per month over past year

Repository Staff Only: item control page

View Item View Item

University of Huddersfield, Queensgate, Huddersfield, HD1 3DH Copyright and Disclaimer All rights reserved ©