RF and Surface Properties of Bulk Niobium and Niobium Film Samples
نویسندگان
چکیده
At CERN a compact Quadrupole Resonator has been developed for the RF characterization of superconducting samples at different frequencies. In this contribution measurements on bulk niobium and niobium film on copper samples are presented. Surface resistance results are being correlated to surface analyses measurements carried out on the same samples.
منابع مشابه
RF and Surface Properties of Superconducting Samples
At CERN a compact Quadrupole Resonator has been developed for the RF characterization of superconducting samples at different frequencies. In this paper, results from measurements on bulk niobium and niobium film on copper substrate samples are presented. We show how different contributions to the surface resistance depend on temperature, applied RF magnetic field and frequency. Furthermore, me...
متن کاملStudy of Ac/rf Properties of Srf Ingot Niobium
In an attempt to correlate the performance of superconducting radiofrequency cavities made of niobium with the superconducting properties, we present the results of the magnetization and ac susceptibility of the niobium used in the superconducting radiofrequency cavity fabrication. The samples were subjected to buffer chemical polishing (BCP) surface and high temperature heat treatments, typica...
متن کاملReview of Rf-sample Test Equipment and Results
A calorimetric technique enables precise measurements of the surface resistance RS of superconducting samples. One of the devices exploiting this technique at multiple frequencies is the Quadrupole Resonator. Its measurement capabilities and limitations are discussed and compared with similar devices. Results on bulk niobium and niobium film on copper samples are presented. It is shown how diff...
متن کاملDevelopment of an Optimized Quadrupole Resonator at HZB
Current superconducting cavities are generally made of solid Niobium. A possibility to reduce cost as well as increase the quality factor and/or accelerating fields is to use thin film coated cavities. Apart from Niobium thin films, other substances such as Magnesium diboride, Niobium nitride and Niobium-tin are promising candidates. Measuring the RF-properties of superconducting thin films, sp...
متن کاملPlasma Treatment of Bulk Niobium Surface for Superconducting RF Cavities: Optimization of the Experimental Conditions on Flat Samples
This Article is brought to you for free and open access by the Physics at ODU Digital Commons. It has been accepted for inclusion in Physics Faculty Publications by an authorized administrator of ODU Digital Commons. For more information, please contact [email protected]. Repository Citation Rašković, M.; Upadhyay, J.; Vuskovic, L.; Popovic, S.; Valente-Feliciano, A.-M.; and Phillips, L., ...
متن کامل