Loading…

Near-field microwave magnetic nanoscopy of superconducting radio frequency cavity materials

A localized measurement of the RF critical field on superconducting radio frequency (SRF) cavity materials is a key step to identify specific defects that produce quenches of SRF cavities. Two measurements are performed to demonstrate these capabilities with a near-field scanning probe microwave mic...

Full description

Saved in:
Bibliographic Details
Published in:Applied physics letters 2014-06, Vol.104 (23)
Main Authors: Tai, Tamin, Ghamsari, Behnood G., Bieler, Thomas R., Tan, Teng, Xi, X. X., Anlage, Steven M.
Format: Article
Language:English
Subjects:
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A localized measurement of the RF critical field on superconducting radio frequency (SRF) cavity materials is a key step to identify specific defects that produce quenches of SRF cavities. Two measurements are performed to demonstrate these capabilities with a near-field scanning probe microwave microscope. The first is a third harmonic nonlinear measurement on a high Residual-Resistance-Ratio bulk Nb sample showing strong localized nonlinear response, with surface RF magnetic field Bsurface∼102 mT. The second is a raster scanned harmonic response image on a MgB2 thin film demonstrating a uniform nonlinear response over large areas.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4881880