8th International Workshop on Thin Films and New Ideas for Pushing the Limits of RF Superconductivity

Session

RF characterization for SRF films

10 Oct 2018, 09:00

Villi Room (INFN - Laboratori Nazionali di Legnaro)

17. Measuring field penetration on thin film Samples above 150 mT

Dr Claire Z. Antoine (CEA)

10/10/2018, 09:00

RF and material characterization for SRF films

Developing thin films deposited with complex superconductors like Nb3Sn or multilayers requires being able to test the maximum field achievable on numerous samples. In classical magnetometer where the sample is immersed in homogenous field, there is always some ambiguity resulting from the fact that the penetration of field can start on the back or the edges of the samples. We have tried to...

18. Tunneling spectroscopy - correlations between superconducting properties and RF performances

Mr Thomas Proslier (Commissariat de l'énergie atomique)

10/10/2018, 09:25

RF and material characterization for SRF films

I will present recent analysis of tunneling spectroscopy data measured on cut out samples from a N doped cavity, and from commonly processed hot and cold spot regions of a BCP cavity. The hot spot samples reveal small gap area consistent with a proximity effect model along with spectroscopic signature of magnetic impurities, caracteristic of two level systems. The cold and N doped samples on...

19. Characterizations of superconducting materials at HZB with Quadrupole Resonator

Mr Dmitry Tikhonov (Helmholtz-Zentrum Berlin (HZB))

10/10/2018, 09:50

RF and material characterization for SRF films

At the present time more and more low temperature superconducting materials and compounds are being developed around the world for new applications in future accelerators and industry. However, the production processes and recipes are not fully developed and require measurement tools for studies and optimization. The Quadrupole Resonator (QPR) is a cavity that is able to perform the most...

13. Microscopic Investigation of Materials Limitations of Superconducting RF Cavities

Prof. Steven Anlage (University of Maryland)

10/10/2018, 10:15

RF and material characterization for SRF films

Based on the needs of the SRF community to identify and evaluate defects on Nb surfaces, a novel near-field magnetic microwave microscope was successfully built using a magnetic writer from a conventional magnetic recording hard-disk drive [1]. This magnetic writer can create an RF magnetic field in the 100 mT range, localized and strong enough to drive Nb into the mixed state, and may have...