TITLE

Note: Radio frequency surface impedance characterization system for superconducting samples at 7.5 GHz

AUTHOR(S)
Xiao, B. P.; Reece, C. E.; Phillips, H. L.; Geng, R. L.; Wang, H.; Marhauser, F.; Kelley, M. J.
PUB. DATE
May 2011
SOURCE
Review of Scientific Instruments;May2011, Vol. 82 Issue 5, p056104
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
A radio frequency (RF) surface impedance characterization (SIC) system that uses a novel sapphire-loaded niobium cavity operating at 7.5 GHz has been developed as a tool to measure the RF surface impedance of flat superconducting material samples. The SIC system can presently make direct calorimetric RF surface impedance measurements on the central 0.8 cm2 area of 5 cm diameter disk samples from 2 to 20 K exposed to RF magnetic fields up to 14 mT. To illustrate system utility, we present first measurement results for a bulk niobium sample.
ACCESSION #
62010757

 

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